Blepliarocorys angusta Blepliarocorys curvlgiila Bundleia postciliata Didesmis oTalis Tripalmaria dogieli Tetratoxum unifasciculatum Triadinium caudatim Ditoxum funinucleum Cocliliatoxum periachtum No« 10. Feces Cyclopostliima. bipalmatam Blepliarocorys augusta Didesmis quadrata Ciiiaroii equi-14-Eo. 11. 5/4/gS geces Blepliarocorys angusta Didesmis quadrata Allantosama intestinalis TriclicQjionas equi Ho. 12, 5/14/23 Cecmn Colon Cyclopostliiiiin. bipalmatum CyclopostiiixiEL edentatum Cyclopostnium scutigeinim Paraisotriclia colpoidea Paraisotrielia minuta Paraisotrieha beclceri Didesmis spiralis Blep]iarosp!iae2?a intestinalis Blepharospliaera ellipsoidalis Bundleia postciliata Alloiozona trizona Cyclopostiiium. bipalmatimi C^eloposthiiiDi edentatum Blepliarocorys cufvigula Blepliarocorys angusta Paraisotrieha colpoidea Bundleia postciliata BlepiiaroprostMuiii pireum Blepharoconus cervicalis Blepliaroconus benbroolci Triadinium caudatum Triadinium galea Coeliliatorum periacktuiii Tripalmaria dogieli Spirodiniujn eqiii Ditosum funinuclem Tetratosnim •unifasciculatuni Tetratosum parTrom Polymorpba ampulla Allantosojsia dlcomiger IIo. 15, 5/14/38 Cecum Cyclopostiiium bipalmatuia Cycloposthium. scutiserum Cyeloposthiuiii edentatum Blepliarocorys uncinata Blepliarocorys jubata Paraisotriclia minuta Paraisotriclia beckeri Didesmis oralis Didesmis spiralis Bundleia postciliata Ho. 14. 10/6/28 Cecum. Cyclopostiiium. bipalaatum Cyclopostiiium scutigerum Cycloposthium dentiferiim Cyclopostliiuni corrugatum-15-Ho« 14« 10/6/28 Cecum (Continued) Blepharocorys uncinata Blepharocoiys jubata Paraisotricha colpoidea Paraisotricha mirnita Paraisotriciia Iseckeri Blepliaroprostiiiim pireum Blepliarospliaera int es t inali s Alloiozona trizona No. 15 > 10/13/23 Cecum Cycloposthiizm bipalmatum Gyclopostliiiia edentatim Cyeloposthiinii dentiferom Blepliarocorys nncinata BlepharoGorys jnl)ata Paraisotriciia colpoidea Paraisotriclia minuta Allantosoma "bre'vlcomiger Tricliomonas eq.ui Sndamoeba gedoelsti Ho. 16» 10i/l9/38 Cecum. Colon Cyelopostliium liipalmattm CycloposthiiM dentifenm Cyclopostliimri edentatim Cyclopostiiitim scutigerum Blepharocorys uncinata Blepliarocorys jubata Paraisotriclia minuta Bundleia postciliata Didesais oralis Blepharosphaera intestinalis Callimastis: equi Blepliarocorys curvigula Blepliarocorys angusta Blepliarocorys iralvata Bundleia postciliata Didesmis ovalis Blepliarospliaera intestinalis Triadinium caudatum Triadinium galea Allantosoma intestinalis Allantosccia dicorniger No. 17. 10/30/28 Cecum Cycloposthium bipalmatum Cyclopostnium scutigerum Cyelopostliium dentiferum Blepliarocorys Jubata Paraisotriclia colpoidea Paraisotriclia minuta Paraisotriclia beclceri Didesmis ovalis Bleptiaroprostliium pireum Alla-ntosoma intestinalis Allantosoma "bre-ylcorniger Trichomonas equl •16. Ho> 18« IQ/27/38 Cecnm Gycloposthim bipalmalnini Cycloposthlimi scutigerum Blepharocorys nncinata Blepharocorys jubata Paraisotrielia eolpoidea Paraisotricha minuta BlepharoprosthiTiDi pirem No. 19, ll/lO/SB Cecum Colon Gyclopost...

The total gain in weight for the infusoria-free lot in 8 weeks was 156 lbs. as contrasted with 117 lbs. for the normal infected lot. Thus to date the infusoria-free lot has shown a weight increase of 133.3% as much as that of the other lot. The lambs were weighed individually and a table of individual weights each week in pounds and ounces will be published in a later paper. The experiment will continue at least until September first. The results of the experiment to date certainly indicate that, as measured by weight gains of growing animals, ruminants derive no benefit from the infusoria normally present in the first two divisions of their stomachs. We reserve our judgment as to whether or not these protozoa are a handicap until the experiment has progressed further. Acknowledgment.-The experiments reported in this note are being made possible by grants from the American Association for the Advancement of Science and from the BACHI FUND OF THs NATIONAL ACADZMY OF SCIENCES.

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Jameson (1926) has described from the caeca of cattle a ciliate belonging to the family Isotrichidae to which he has given the name Buxtonella sulcata. The most prominent character of this ciliate is a dorsal ridge running in a wide sweeping curve from one end of the body to the other with a groove running down the middle. Other characters of importance are a peculiar indentation near the mouth and the not uncommon occurrence of the macronucleus in two separate rounded portions. Roundish oval cysts of this ciliate, 80 to 100 microns in length by 60 to 80 microns in width, were also found by him.

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