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Show 636 MR. F. E. BEDDARD ON THE [May 22, spermathecae in vi.-viii., instead of vii.-ix. as described by Horst, Bosa, and Michaelsen. The latter has now solved the difficulty by finding that in some specimens, which he distinguishes as a variety lenzi, the spermathecae have that position. Moreover these worms are smaller than the type, 90-145 mm., and have rather fewer setae. The gizzard-septa are entirely absent, and the sperm-sacs have a small " Anhangsblase " such as occurs in many worms, but (as is also sometimes the case elsewhere) sunk into the proper sperm-sac. The example studied by myself belongs to this variety, and has the spermathecal pores between v./vi.-vii./viii. It is smallish, and has a bent instead of* a straight duct to the spermiducal glands. I observed the same accessory lobe to the sperm-sacs that Michaelsen refers to. 64. Amyntas ijimae Rosa. Perichceta ijimce, Rosa, Ann. k.-k. Hofm. Wien, vi. p. 402. Perichceta kamakurensis, Goto & Hatai, Ann. Zool. Japon. ii. p. 68. Perichcetaparvula, iid. ibid, p, 68. Perichceta decimpapillata, iid. ibid. p. 71. 110-150 mm., 115 segments. 60 seta? on viii. Papillae paired on vi.-viii. and on xvii.-xix., as many as two pairs to each segment. Spermiducal gland extensive, in xv.-xx. ; sometimes absent. Spermatheca? with minute diverticula or without any. Hab. Japan. I unite the three species described as separate by Messrs. Goto & Hatai with Dr. Rosa's Perichceta ijimce on account of the missing or small spermathecal diverticula. Rosa's species only differs iu the greater number of seta? in tbe spermathecal region (6() as against 36) and in the absence of papillae. But these latter are so inconstant that tbe fact is not necessarily fatal to the collocation of these forms. P. parvula is very minute, only 32 mm., with 48 segments, and has no genital papilla or spermiducal gland. To this form it may be necessary to assign a separate specific name. But I do not do this for the present. It has no diverticula, while decimpapillata has " very small diverticula." 65. Amyntas acrophilns Bosa. Perichceta acrophila, Bosa, Ann. Mus. Civ. Genova, (2) xvi. p. 527. 73 mm., 110 segments. Setae closer ventrally, 30 on vii., 40 on xxv. 14 seta? between male pores. Septum viii./ix. feeble Spermiducal glands occupying five segments, with short duct. Diverticulum of spermatheca zigzag, longer than pouch. Hab. Sumatra. 66. Amyntas brevis Bosa, Perichceta brevis, Bosa, Ann. Nat. Hist. (7) ii. p. 283. 20 mm., 80 segments. Seta? 50 on xxv. 14 seta? between male |