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Show 226 ME. F. E. BEDDARD ON NEW EAETHWOEMS. [Mar. 19, confine myself to those characters which appear more or less to distinguish the species. It is a small species, about an inch in length ; there is no pigmentation at all discernible. The clitellum occupies segments xiv.-xx., and is incomplete ventrally on the genital segments, i. e. segments xvii.-xix. On those segments only the inner of the two ventral setae are present. There is a not very well developed gizzard in segment vii. The calciferous glands, as usual, are in ix. They are rather thick-walled, but are without any folds of the lining epithelium. The walls are vascular, but whether there is the mass of tubules which I have described in the last species I a m unable to say. The intestine appears to begin in segment xiii. At any rate in this segment the lining epithelium undergoes a sudden change in thickness, being from that segment onwards much thinner; at the end of the twelfth segment the thick epithelium projects into the lumen of the gut of the next segment and forms a kind of trap which would allow of the passage of food backwards, but would not allow of its passage in the opposite direction. The first segment of the intestine, however, as I find it, is of less calibre than the section which commences in the fourteenth segment; but it differs from the section which begins in that segment by being rather folded. The thick septa occupy segments v./ix., but the next two are thicker than those which follow. The last heart is in xi. The spermathecae, without any diverticula, are in viii., ix.; they consist of a thick-walled duct and of a thin-walled portion which is stored with sperm. The length of the two regions of the spermathecae is about the same. The epithelium which lines the thick-walled section of the organ which may be regarded as the duct is thrown into folds; there is no folding of the distal section. The testes are, as usual, in segment x. This segment also contains the sperm-duct's funnels. There seems to be only a single pair of sperm-sacs, which are in segment xi., and are not racemose in character. The cavity of the tenth segment contained a mass of developing sperm; but this cannot be regarded as the equivalent of a sperm-sac, for it was not surrounded by any membrane. The sperm-ducts were not developed in the specimen which I examined by means of transverse sections ; on the other hand, the oviducts' were fully developed, and their openings on to the exterior in segment xiv. were quite obvious. The spermiducal glands reached back as far as the twenty-fifth segment. Hab. Valparaiso, Salto. Earn. CBYPTODBILIDJE. The family Cryptodrilidae is represented in the present collection by the genus Microscolex only. Nor has any other genus belonging to this family been recorded from the southern parts of the American continent. Michaelsen's Cryptodrilus spatulifer is the only Cryptodrilid that w e at present know from the temperate |
