438 OLIGOCHAETA 



a dorsal median gap. Gizzard feebly developed in VI; a dilatation in XIII, which is 



probably a caleiferous gland. Spermathecae in, VIII, IX, each with a small stalked 



piriform appendix. Spermiducal gland limited to segment XVIII. No penial setae. 



Hah, — Java; Sumatra. 



HoKST remarks about this species that it is possible to distinguish the nephridia 



lying anterior to the eighteenth segment by the fact that the excretory tube is more 



highly developed than in the rest of the body. I have had a specimen of either 



this or the last (my notes are imperfect) from Durban. 



(5) Perionyx macintoshii, Beddakd. 

 p. M'Intoshii, Beddaed, Ann. Mag. Nat. Hist., Oct. 1883, p. 317. 



Definition. Length, 249 mm.; diameter, 9 mm.; number of segments, 261. Clitelhim, 



XIII— XIX. Dorsal pores commence V/VI. Male pores upon an oval depression 3 mm. 



wide, behind setae which are but little modified. Gizzard in VI ; intestine begins in 



XIX. Last hearts in XIII. Sperm-sacs in X-XII. Spermathecae without diverticulum, 



two pairs. Hab. — India; Burmah. 



The first individual of this species that I examined was immature ; hence there 



is a possibility that it is not really the same as some specimens (57) from either 



Seebpore or Darjiling (unfortunately I have mislaid my notes relative to the locality); 



in the meantime its large size is a feature which characterises both and distinguishes 



them from any other form. The mature examples are further to be differentiated by 



the extensive clitellum. 



(6) Perionyx arboricola, Kosa. 



p. arboricola, Rosa, Ann. Mus. Civ. Genova (aa), x, 1890, p. 119. 



Definition. Length, 70 mm.; diameter, 5 mm.; number of segments, 110. Clitellum, 

 XIV-XVl. Setae, 56-60 per segment, much closer ventrally. Dorsal pores commence 

 V/VI. Gizzard small in V. Spermathecae in VI, VII, VIII, IX, with a tubular 

 diverticulum. Spermiducal glands enormous, occupying nine segments. Hab. — Burmah. 



(7) Perionyx sansibaricus, Michaelsen. 



p. sansibarieus, M1CHAEL8EN, JB. Hamb. wiss. Anst., ix, 1893, p. 4. 



Definition. Length, 63 mm.; diameter, 3 mm.; number of segments, 108. Clitellum, 

 XIII-XVII. Setae, 40 per segmsnt in front of clitellum, 50 behind. Dorsal pores 



