On Lumbricillus Scoticus n. sp.

Abstract

A small orange-coloured Enchytraeid Oligochaete has been known for some years to occur fairly abundantly in certain sheltered parts of the shore on the Cumbraes. It is also generally present, though scarce, on exposed parts of the shore. Hitherto it has been confounded with other species of Lumbricillus, but is now described as a new species.

Marine Oligochaeta from the Koster Area, West Coast of Sweden, with Descriptions of Two New Enchytraeid Species

“…The male genitalia are very similar in the two species, especially the anatomy of the penial bulbs. Elmhirst & Stephenson (1926) gave a very detailed description of the histology of the bulbs of L. scoticus, which conforms relatively well to the morphology of the same structures in L. algensis (Fig. 4).…”

“…The type material of Lumbricillus scoticus Elmhirst & Stephenson, 1926 was kindly placed at my disposal from the British Museum (Natural History), London.…”

On the Occurrence of Echinus esculentus on the Foreshore in the British Isles

“…The seatemperature off Plymouth rises in this period from about 9-0° to about 13° C. (12 , Table I), and at Millport, in shallow water, from about 45° to 52° F. (7-22 to 11-11° C.) (13). esculentus spawns naturally at Plymouth during the period April-June (ripe individuals regularly give successful fertilisations in March in the Plymouth Easter Class), and April-June is the period Elmhirst gives (loc.…”

“…for the inshore spawning migration at Millport. The seatemperature off Plymouth rises in this period from about 9-0° to about 13° C. (12,Table I), and at Millport, in shallow water, from about 45° to 52° F. (7-22 to 11-11° C.) (13). Thus, if a temperature of 10° to 11° C. be required for spawning, it is clear that E. esculentus would need to migrate shorewards at Millport in order to obtain the required temperature in spring or early summer.…”