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Show 1900.] EARTHWORMS OF THE GENUS AMYNTAS. 615 with not long diverticulum ; dorsal in position. Sperm-sacs with long dorsal process.1 Hab. Mahe Island ; Madagascar. B. Spermathecae 4 pairs in vi.-ix. 4. Amyntas cingulatus Vaillant. Perichceta cingulata, Vaillant, Ann. Sci. Nat. (5) x. p. 228 (in part), and M e m . Soc. Montpellier, vii. p. 146 (in part). P. darnleiensis, Fletcher, Proc. Linn. Soc. N. S. W . (2) i. p. 966. P. vaillanti, Beddard, P. Z. S. 1890, p. 66. P. martensi, Michaelsen, Arch, f. Naturg. 1892, p. 242; id. Abb. Senck. nat. Ges. xxiii. p. 240, and Oligochceta in Semon's Forsch. Beise, v. Lief. i. p. 99. P. indica, Horst, Vermes in ' Midden-Sumatra,' p. 4. P. eoa, Eosa, Ann. Mus. Civ. Genova, (2) xvi. p. 528 & p. 609. P. martensi, Horst, Notes Leyd. Mus. xv. p. 324. P. madelince, Benham, Journ. Linn. Soc, Zool. xxvi. p. 219. Amgntas padasensis, var. lokonensis, Michaelsen, Jahrb. Hamb. wiss. Anst. xvi. p. 78. Perichceta belli, Rosa, Ann. Nat. Hist. (7) ii. p. 286. Megascolex cingulatus,YaiWant, Anneles, 1889, p. 7 2 2 (in part). 45-180 mm., 70-125 segments. Setae up to 66 in a segment, 10-16 between male pores. Sperm-sacs often with dorsal processes. Spermiducal glands xvi.-xviii., with straight or S-shaped duct. Diverticula of spermathecae not long, often with one or more secondary diverticula. Septum viii./ix. occasionally present, but thin. Hab. Java, Sumatra, Celebes, Mentawei, Philippines, Torres Straits. It seems to m e to be impossible to separate specifically these forms. I point out later that Perichceta indica of Horst (as figured in his account of the worms in ' Midden-Sumatra') cannot be Perichceta indica of subsequent authors, since it has a large terminal sac to the duct of the spermiducal gland. As far as can be judged, it is, as Horst supposed, the same species as Vaillant's Perichceta cingulata figured in his plate. From these I cannot differentiate m y Perichceta vaillanti in the light of fuller knowledge. The characters of the latter offer no differences from P. madelince, with which Michaelsen, as I think, rightly unites his " Amgntas padasensis, var." As to martensi and eoa, they are doubtless identical with each other. The accessory diverticulum reminds us 1 It is often the case that the dorsal ends of the sperm-sacs have a narrow knob-like projection. It seems to m e to be merely a part of the sperm-sac which has not become fully expanded with semen. In the meantime, however, I mention the character where it has been noted. 2 Perichceta cingulata of Schmarda is of course a Megascolex, as now defined. |