404 OLIGOCHAETA 



responding in position to male pores ; in front of posterior and behind anterior of these 

 a sucker ; on XFIII a pair of papillae to inside of male pores and in front of line of 

 setae. Setae 80-90 behind clitellum, fewer in front, diminishing forwards. Dorsal pores 

 commence IIII/XIV. Septa V/VII, X/XII thickened. Hearts in X-XIII. Spermathecae 

 in VI-IX ; papillae on VII, Fill. Spermiducal gland, with horseshoe-shaped duct. 

 Hah. — Billiton. 



(4) Perichaeta enganensis, Rosa. 



p. enganensis, RoSA, Ann. Mus. Civ. Genova, vol. xii (2a), 189a, p. 546. 



Definition. Length, I'jomm.; breadth, 7 mm.; mmber of segments, 140. Clitellum, 

 XIF-XVI, without setae. Male pores on line with seta, 8, 3 mm. apart. Setae, 80 on 

 segment IX, closer ventrally. First dorsal pore, XII/XIII. Caeca in XXFI, reaching to 

 XX. Septa FIII/X absent; none specially thickened. Spermathecae in FI-IX; 

 diverticulum swollen at end, longer than pouch. Sperm-sacs in XI, XII ; sperm-reservoirs 

 in X, XI. Spermidtwal gland with short duct. Hab. — Engano. 

 Of this species Rosa describes a variety which he has called ' Tetra.' The variety 

 is much darker in colour than the type, being of an uniform black brown ; the sperma- 

 thecae also are different in that the pouch is quite distinct from its long duct. 



(5) Pericliaeta carinensis, Rosa. 



p. carinensis, RosA, Ann. Mus. Civ. Genova, vol. x (aa), 1890, p. 107. 



Definition. Length, aoo mm.; breadth, 7 mm.; number of segments, 150. Clitellum, 

 XIF-XFI. Male pores on line with seta, i§. A pair of genital papillae on XFIII 

 between male pores, but a little anterior to line of setae, while male pores are behind 

 line of setae. Setae, 60 per segment in region of spermathecae. Dorsal pores commence 

 XI/XII. Septa FIII/X absent; none are mentioned as specially thickened. Hearts in 

 X-XIII. Spermathecae in FII-IX; diverticulum shorter than pouch. Sperm-sacs in 

 XI, XII, the last pair much larger, extending through several segments. Spermidtical 

 gland occupying three segments, with long duct. Hab. — Mount Carin (1,100 m), Burmah. 



(6) Perichaeta feae, Rosa. 



p. Feae, Rosa, Ann. Mus. Civ. Genova, vol. vi (aa), 1888, p. 161. 



Definition. Length, 360 mm.; breadth, 8 mm.; number of segments, 160. Clitellum, 

 XIII-XFII, with setae. Male pores on line with fifteenth seta. Setae, 100 in 

 spermathecal segments. Oesophagus with a circle of glands (calciferous glands?) in 



