196 Memoirs of the Indian Museum. [Voiy. I, 



sac-shaped, sessile accessory pouches, in appearance nearly resembling the ampulla. 

 Besides these the main pouch bears a long, tubular, thread-like diverticulum, swollen at 

 the proximal end to form a pear-shaped simple seminal chamber nearly three times 

 as thick as the thread-like stalk of the diverticulum. The diverticulum is irregularly 

 coiled. Extended it would surpass the main pouch in length, being nearly twice as 

 long as the latter. It opens into the distal part of the duct of the main pouch. 



Hab. — South Andaman Isl., N. Cinque Island, 100', in dense forest 

 about 3" below surface of ground; B. B. OSMASTON leg., 23-xii-o6. 



Remarks. — This species is allied to Ph. burchardi (MICHIySN.) and Ph. osmatoni,. 

 MiCHIySN. (Vide " Remarks" below the description of the latter species, supra.) 



Pheretima suctoria, Michi^sn. 

 (Plate xiii, fig. 28.) 



Ph. s., MICHAELSEN, in Mt. Mus. Hamburg, xxiv, p. 165, f. 12. 



I examined several partly mature specimens. 



External Characters. — Dimensions of the mature specimens very different: 

 lycngth 75 — 135 mm., greatest thickness 4^ — 7 mm., number of segments 103 — 123. 



Colour : At the anterior segm.ents dorsally chestnut-coloured, in other parts 

 of the body lighter, yellowish bro-wTi. 



Head epilobous (abouti). The dorsal hinder a p p e n d i x of the prostomium 

 is very short and broad, close behind. 



Setae all nearly of equal size. Circles of setse continuous, in general of equal 

 density, only on the anteclitellar segments dorsally somewhat further apart than ven- 

 trally. Numbers of setae on the anterior segments vary greatly : 25 — 38-v, 35 — 58-x, 

 60 — 70-xiii, 75-xix, 8o-xxvi. 



First dorsal pore on the intersegmental furrow 12-13. 



Clitellum developed all round the body, occupying segments 14 — 16 ( = 3), 

 without setae. 



Male pores on small papillae in the zone of the setae of the i8th 

 segment, about one-third of the circumference of the body distant one 

 from the other. 



Female pores very near the ventral median line, if not in 

 juxtaposition, on a minute, transversely oval area or a short transverse 



furrow. 



Spermathecal pores four pairs on the intersegmental furrows 

 5_6 — 8-9, ventro-lateral , about one-fourth of the circumference of the 

 body distant from one another. 



Copulatory organs, apparently always constant, and similar 

 in all mature specimens examined by me ; a pair of great, circular or 

 transversely oval areas on the i8th segment in the zone of setae, 

 placed medially between the male pores. The papillae of the male ^ ' ^.^' 



pores project a little over the lateral borders of these areas, and the suctoria. 



rim-like zone of the setae over the medial borders. The diameter of the 



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