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Show 200 MR. F. E. BEDDARD ON EARTHWORMS [Jan. 14, The spermiducal glands extend through three segments; they are coarsely lobate, and the muscular duct is curved like a horseshoe ; there is no terminal sac. The ovaries are in segment xiii., and in the same segment are a pair of rather large kidney-shaped egg-sacs. The spermathecce are four pairs in segments vi.-ix. The pouch, which is pear-shaped, is sharply marked off from the narrow duct. The diverticulum is rather longer than the latter, and ends in an oval dilatation. Locality. Halemanu, Kauai. Remarks.-This species does not possess any very marked distinctive characters, excepting, perhaps, one which will be described immediately. On the other hand, I cannot identify it with certainty with any of the species already known that have four pairs of spermathecae. I may take this opportunity of recording a peculiarity in the sperm-ducts of Perichceta perhinsi, which is new to the genus, and does not therefore help in the identification of this species ; indeed, so few species of Perichceta have been examined microscopically, that the absence of the peculiar relations of the sperm-duct to the spermiducal gland, which I a m about to describe, in the species Perichceta perhinsi. Spermiducal gland (pr.), vasa deferentia (v.d.), and muscular duct (M.) of gland of Perichceta perhinsi (left-hand figure) and of a normal Perichceta (right-hand figure). already investigated, does not go for much. The two sperm-ducts retain their separateness, and perforate the duct of the spermiducal gland at some little distance from its external opening, but at a point where it is already wrapped up in a moderately thick coating of muscular fibres, not so thick, however, as they will ultimately become. The two sperm-ducts, however, do not at |
