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Show 624 MR. F. E. BEDDARD ON THE [May 22, position of the spermathecal orifices is unusual, but is paralleled A. trinitatis. 24. Amyntas vordermanni Horst. Perichceta vordermanni, Horst, Notes Leyd. Mus. xii. p. 231. 315 mm., 175 segments. Seta? 80-90 behind clitellum. Suckerlike papillae paired on xvii., xviii. ; besides these, prominent papillae on same segments in line of setae, in front of that of xvii. and behind that of xviii. on each side. Also papillae on vii., viii. Spermiducal glands xvii.-xxii. Large gland corresponding to papillae in this region of body. Spermathecae with diverticulum half their length. Hab. Billiton. 25. Amyntas padasensis Beddard & Fedarb. Perichceta padasensis, Beddard & Fedarb, Ann. Nat. Hist. (6) xvi. p. 73. Non Amyntas padasensis, Michaelsen, Jahrb. Hamb. wiss. Anst. xvi. p. 74. 280 mm., 96 segments. Setae slightly larger anteriorly; occasionally more closely crowded ventrally, especially on xvii., xviii. Male pores divided by 10 setae. Spermiducal glands with thick straight duct. Diverticula of spermathecae with accessory sperm-chambers. Sperm-sacs in x.-xiii., those of xi., xii. with a small apical lobe, as in many other species. Hab. Borneo. In this species the difference in size between individuals is great. Two examples from Padas Valley were respectively 280 and 187 m m . Those from Merabah about 120 m m . or so. The spermathecae have a remarkably strong duct, nearly as wide, and quite as long, as the pouch. The diverticula are not always provided with additional swellings; but they are often so. The arrangement is like that of the Japanese worm I called Perichceta nipponica, Amyntas darnleiensis, and also A. martensi, where the fame occurrence and non-occurrence of the supplementary diverticula is met with. I have seen five specimens of this species, the two large ones from Padas and the smaller ones from Merabah. 26. Amyntas trinitatis Beddard. Perichceta trinitatis, Beddard, P. Z. S. 1896, p. 206. 150 mm., 100 segments. Setae on vi.-ix. larger, 45 on xvii.; 19 setae between male pores. Spermiducal glands in xvii.-xxi., with horseshoe-shaped duct. Spermathecae open near to dorsal middle line, with diverticulum longer than pouch. Hab. Trinidad. This species appears to be distinct. It differs from A. heterochcetus mainly in dorsal position of spermathecal pores, in larger number of setae between male pores, and in larger diverticulum of spermathecae. It has egg-sacs in xiii., xiv. |