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Show 638 MR. F. E. BEDDARD ON THE [May 22, 71. Amyntas supuensis Mich. Perichceta supuensis, Michaelsen, Abh. Senck. nat. Ges. xxiii. p. 225. 115 mm., 145 segments. Seta? very numerous and small, 132 on vi., 154 on vii., 106 on xxvi. Papillae on xviii., xix., several pairs, and on viii., ix., one pair each. Spermiducal gland not large, embracing a thick short duct. Hab. Halmahera, Supu. Here again, as in A. halmaherce, the generative orifices are closely approximated to each other. K. Spermathecae 2 pairs in vi., vii. 72. Amyntas biserialis Perrier. Perichceta biserialis, Perrier, Comptes Bend, lxxxi. p. 1044; Beddard, P. Z. S. 1890, p. 63. Perichceta biserialis, Michaelsen, Abh. Senck. nat. Ges. xxiii. p. 226 ; Horst, Notes Leyd. Mus. xx. p. 201 ; Beddard & Fedarb, P. Z. S. 1899, p. 803. Perichceta acystis, Beddard, Monograph Oligochaeta, p. 423. Megascolex biserialis, Vaillant, Annele's, 1889, p. 76. 135 mm., 167-220 segments. Seta? on each side of ventral line much enlarged ; those of anterior segments also enlarged ; 81 on v., 90 onx., 70 on xxvi. 14 seta? between male pores. Papillae paired on xix.-xxv. (maximum number). No caeca. Sperm-sacs in xi-xiii. Spermiducal glands in xvi.-xix., with curved duct. Spermathecae paired, 3-6 in each segment, often asymmetrical, sometimes entirely absent, Hab. Philippines, Madagascar, Guiana. There can be no doubt as to the identity of the two species included in the present. The number of setae on the segments varies considerably. The numbers given above are those of Michaelsen. The prevalent number of papilla? is 3 to 5 pairs. Perrier found 7, a number which has not been found by other observers. Out of the 33 examples of the species which have been studied, 12 bad no spermathecae. Generally there are no setae upon the clitellum ; but in one individual at any rate there were a pair upon segment xvi. 73. Amyntas hasselti Horst. Megascolex hasselti, Horst, Notes Leyd. Mus. v. p. 190. Perichceta hasseltii, id. Vermes in ' Midden-Sumatra,' p. 5. 70 mm., 100 segments. Seta? 70-75, those of ventral surface crowded together. Spermiducal glands much divided, with short straight duct. Spermathecae with diverticulum half the length of pouch. Hab. Lebong. |