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View related articles Citing articles: 1 View citing articles On some new Species of Earthworms. 51 Described from a single example taken by Mr. Bell-Marley at Krantzkloof, Natal, July 1910. Plalyn~s (Anchomenus) zuluanus, sp. n. Length 7{-8 ram. ; width 2]-3 mm. Head, prothorax, labrum, and mandibles pieeous red, the head a shade darker than the other parts; first three and tips of ultimate joints of antennae, palpi, and legs light testaeeous brown, the remaining joints of antennae, annulets on terminal joints of palpi, the femora about knees, the tibiae above, and tarsi at apiee~ of joints infuseated or more deeply browned. Ely~ra greenish black, ~eneseent, very shiny, outer margins and beneath rufo-testaceous. Head smoothj t~ons shallowly grooved on either side above epistome. Prothorax narrow, as long as wide, much narrower in the posterior than in the anterior parts, apical angles declivous, prominent, moderately sharp, sides reflex-margined, gently ampliated to about middle, thence sinuately narrowed to the basal angles, which are somewhat obtuse and recurred, disc smooth or hardly perceptibly aciculate, a little convex medially, lateral basal sulci elongate and parallel to margins, median groove deep reaching from apex to a little above base. Elytra a~ base nearly twice as wide as prothorax, shoulders rounded, sides (male) very slightly, (female) a trifle more ampliated, broadly rounded to and a little sinuated before apices, very finely striate, intervals plane and smooth, seriate punctures on third intervals very faint, one near base impinging on the fourth stria, a second a little postmedian~ and two others near together on the apical declivity. In the narrowness of the elytra, not in its contour, it approximates to/). alacer, but in its less elongate legs and other charecteristics it is far removed from that species. Of the South-African species known to me its nearest allies are _P. l¢elulus, Pgr., and P. fallaciosus, P6r.

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There is a definite polarity in the ovarian ova as regards the distribution of the fat-bodies in the younger as well as the fully grown examples. It has not been possible to distinguish two types of ova based on the size or distribution of these deutoplasmic inclusions. The deutoplasmic pole is occupied by fat-bodies of uniformly small size, while the periphery and the plastic or nuclear pole are distinguished by the occurrence of small and large varieties of fat-spherules. Nuclear emission takes place very early in the growth of the ovum and initiates the formation of fat-bodies, and in doing so the nucleolus itself increases in size, while in the final stages of its catalytic activities it diminishes before final expulsion into the follicle cells where it is absorbed. The formation of yolk-disks is attributable to the agency of micrometachondria whose general distribution accords with the appearance of yolk and with which they are in intimate relation. Having given rise to the yolk-disks, they disappear from the fully grown ova. The Golgi bodies also initiate the formation of yolk which appears in the archoplasm, and in this process the Golgi rods are noticed to undergo appreciable diminution in size. Later in the development of the ovum the Golgi rods form a close cap on the nuclear membrane, and those which have not participated in the formation of yolk lie scattered in the general cytoplasm. Deep imaginations and their secondary ramifications occur in the ovary throughout the life of the lemur, and fresh ova arise from the germinal layers of these invaginations as well as the interstitial cells. The nuclear changes involved in the production of fresh ova are in accord with the observations already published by the other authors who have studied these changes in the rabbit, and the only point worth recording is that the diplotenic stage is less clearly marked and the dictyate stage is speeded up in the lemur.