igoS.J W. MiCHAKi/SEN : OligochcBta of the Indian Empire and Ceylon. 



227 



External Characters, — Dimensions: I^ength 130 mm., thickness 4— 4| mm., 

 number of segments 118. 



Colour grey. 



Head indistinctly tanylobous ; prostomium small, in the examined specimen 

 completely retracted into the buccal cavity. 



Setae moderately large, the ventral ones paired, but not strictly, the lateral ones 

 separated, cd = hc = i\ah=j — faa. Median dorsal distance hardly larger than half 

 the circumference (^^ = ca. f u). 



First dorsal pore on the intersegmental furrow 11-12. 



Clitellum nearly regularly ring-shaped, only on the median ventral part be- 

 tween the lines of setae a somewhat less distinct, occupying the segments 13 — 17 ( =5). 



Male pores on the 17th segment, on nearly circular papillae the centres of which 

 are situated in about the lines of setae h. 



Female pores before the setae a of the 14th segment. 



Sperm a thecal pores one pair in the intersegmental furrow 7-8 in the lines of setae ô. 



Copulatory organs: Four pairs of transverse slits or narrow transverse 

 areas behind the ventral setae of segments 13 — 16, if not in the 

 intersegmental furrows 13-14 — 16-17, apparently a little before these 

 intersegmental furrows. 



Internal Anatomy. — Septa 4-5, 5-6 and 8-9 — lo-ii thick- 

 ened, 6-7 and 7-8 missing. 



Alimentary tract: A big gizzard between septa 5-6 and 

 8-9. CEsophagusin the 12th segment swollen, doubtless containing 

 a pair of calciferous glands. 



Nephridial system micronephric. 



Anterior male organs: One pair of sperm-duct-funnels 

 in the nth segment (enclosed in a common seminal vesicle ?). 

 A pair of sperm-sacs depending backwards from septum 11-12, ex- 

 tending through a great number of segments, in the examined 

 specimen as far as into the 33rd segment, broader and lobed in the 

 anterior part, restricted by the septa. 



Prostates tube-like, glandular part very long, convoluted, occupying about 

 four segments, muscular duct thinner and very much shorter, but nevertheless rela- 

 tively long, describing two loops. 



Penial setae (fig. 57) about if mm. long and 26 m thick, bent only at the 

 distal part, hardly tapering towards the distal end which has a simple, blunt tip. 

 Beneath the extreme distal end, which is quite smooth, the seta is ornamented by sparse, 

 scattered, small, irregularly- toothed transverse ridges, or rows of short teeth. 



Spermathecae (fig. 56) : Main pouch with a nearly globular ampulla which 

 opens by an indistinct, very short duct, about half as broad as the ampulla. Into this 

 duct open three or four groups of diverticula. The diverticula are unstalked, simple 

 and globular, or formed by a more or less complete union of two, three or four such 

 ones. They form an interrupted rosette round the duct, in situ hidden by the ampulla. 





XX 



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Fig. 28. 



Eutyphoeus phar- 

 pingianus. 



