1920.] J. Stephenson: Oligochaeta from India and E. Persia. 205 



original single specimen, and in 4/5 in the examples from the Palni Hills, begin here 

 in 3/4, remarkably far forward. 



The region of the male pores is characteristic (fig. 7). Segment xviiiis somewhat 

 lengthened in the mid-ventral region, its anterior and posterior limits being bulged 

 forwards and backwards respectively. The male apertures are small transverse 

 slits close to the middle line ; while in front and behind the pores there is a cres- 

 centic depression, the convexity of the depressions facing forwards and backwards 

 respectively, and causing the bulging, forwards and backwards, of the intersegmental 

 grooves ; the pores are thus situated on a transverse ridge between the crescentic 

 depressions. A characteristic feature is that the setal ring is not interrupted by the 

 pores, but is continued across the segment, on the ridge but just behind the 

 male pores. 



Internal Anatomy : — I find the gizzard to be in segment vi (Michaelsen in v) ; 

 it is very rudimentary. The intestine is somewhat swollen in xiii, but not specially 

 vascular, nor are there any ridges in the interior. 



Testes and funnels are free in segments x and xi. Besides the seminal vesicles 

 in segments xi and xii, there was. in one specimen dissected a minute structure in 

 ix, on the left side and attached to the anterior face of septum 9/10, consisting of 

 two small ovoid lobules, and perhaps representing a rudimentary vesicle. The 

 vesicles in xii were larger than those in xi, and were somewhat lobulated; those in xi 

 were markedly so. 



The ampulla of the spermathecae is pear-shaped, narrowing towards the ectal end 

 to a duct ; this is short, relatively narrow, cylindrical, one-third as long and one- 

 fourth as wide as the ampulla. There is a single diverticulum, on the inner side of 

 the duct, consisting of a few indistinct seminal chambers aggregated together on a 

 short stalk; the diverticulum is one-fourth the length of the ampulla. 



Perionyx millardi, Stephenson. 

 Plate IX, fig. 8. 



Bombay, Malabar Hill, l-vii-1917. B. Prashad. Three specimens. 

 Talegaon, on the way to Poona. 2-vii-1917. B. Prashad. A single specimen. 

 Kalyan, a short distance inland from Bombay, Bombay Pres. 7-vii-1917. B. Prashad. 

 Four specimens. 



Virar. N. of Bombay, Bombay Pres. 7-vii-1917. B. Prashad. A single specimen. 



The present species was described by me (11) from three specimens from Malabar 

 Hill, Bombay ; these were however much softened and in bad condition, and a few 

 supplementary notes may therefore be of interest. 



The lengths of the specimens which have now come to hand show rather greater 

 variation than those of the original batch ; these are from 35 mm. (though this was 

 perhaps regenerated at its hinder end) to 90 mm. 



The ventral break in the setal rings is very small, — about lj ab, — but it is regu- 

 lar from the clitellum backwards. The dorsal break is very irregular, small or absent, 

 and often not in the middle line. The setae are slightly closer set, and certainly more 



