OCR Text |
Show 1895.] PEOF. A. MILNE-EDWAEDS ON A NEW CRAB. 239 Fam. PEEICHJETID^E. Of this family there was but a single specimen in the collection, belonging to the genus Perichceta. (1) Perichaeta sancti-jacobi, n. sp. As I have already pointed out, the genus Perichceta is far from abundant in South America. Indeed only one species, viz. P. elon-c/ ata,is at all well-known, and that species is by no means exhaustively described. As for P. dicystis and P. tricystis of Perrier, they are only known by the number of spermathecae which they respectively possess. The present species may or may not be identical with one of these. In the meantime I give it a new name. The single specimen measured 70 mm. by 5 mm. in breadth. The number of segments is 75. The colour (in alcohol) a greenish brown. The clitellum occupies segments xiv.-xvi. and is complete. There are setae (about 16) on the last segment of it. I detected no genital papillae. There are about ten setae between the male pores. The gizzard, as usual, is in segments viii., ix. The intestine begins in xv. The last heart is in segment xiii. The sperm-sacs are in segments x., xi., xii. The spermathecae are in vi., vii.; each is a pear-shaped sac with a narrow tubular diverticulum ending in a swollen extremity. The spermiducal glands are solid, though much lobulated. The duct is short and straight, without any terminal sac, which is so frequently present in the species of this genus. There are of course no penial setae. Hab. St. 1, Santiago, Quinta normal. 2. Description of a new Species of Crab of the Genus Hyastenus. By Prof. A L P H O N S E M I L N E - E D W A E D S. (Communicated by Prof. F. JEFFREY BELL, M.A., Sec. R.M.S., F.Z.S.1) [Received March 11, 1895.] HYASTENUS CONSOBEINES, sp. nov. Cette espece ressemble beaucoup a, YHyastenus spinosus2; elle n'en differe que par des caracteres de faible importance et, quand 1 Being uncertain as to the exact position of this Crab, I submitted it to the examination of the learned carcinologist who has lately investigated the Crustacea of Cape Horn, and I have been favoured by him with the description which I submit to the Society. 2 A. Milne-Edwards, Nouvelles Archives du Museum, Memoires, t. viii. p 250 (1872). |