NEW SPECIES OF PERICH^TA. 205 



theca, and severa] other points. P. mandhorensis has long 

 diverticula to the sperinathecse, a long peaial duct, paired caeca,, 

 and so on. 



I consider the facts above recorded to be sufficient to differ- 

 entiate the present species as distinct — more especially, the 

 peculiar ventral intestiual csecum and the porophoral area. 



Peeich^ta Aetuei, n. sp. 



There were about a dozen specimens of this third species,, 

 ranging in length from 70 mm. to 125 mm., with a diameter of 

 about 4 mm. In addition, there are three immature individuals 

 of 50 mm. to 80 mm. in length. 



The coloicr of the worm, with the cuticle still on, is violet 

 anteriorly to the clitellum, and brown posteriorly ; the clitellum 

 itself is deep purple, with a very narrow nearly white band at 

 each end of it, which is better marked in some specimens than 

 in others. The clitellum occupies the usual segments. After 

 removal of the cuticle the general tint of the body is purple- 

 brown, darker anteriorly, the clitellum is deep brown, and the 

 body greyish brown posteriorly. Thus the violet tinge, so 

 noticeable at first, is due to the cuticle. 



There are no chsetal bands, the chsetse being set in a ring 

 only very slightly paler than the rest of the surface. 



The body-wall is very transparent, even in front of the 

 clitellum. 



On stripping off the cuticle, I was astonished to see a long 

 penis issue from the male pore — pulled out with the cuticular 

 lining of the penial duct. This penis (PI. 16. fig. 4«) is a 

 thread-like, cylindrical, slightly-pointed, organ 5 mm. long, so 

 that when pressed forwards it reaches to about the 14th. 

 segment. 



A penis quite of this kind has not been recorded hitherto in. 

 any earthworm, so far as I am aware ; but it is almost precisely 

 similar to that of the Leech {Hirudo). 



The male pores are slit-like, on oval, slightly raised porophores,. 

 which are separated by twelve chgetse. There are no copulatory 

 papillae. There is a single pair of spermathecal pores, not very 

 evident, between segments vii./viii., with about 18 chsetse 

 between them. 



The series of dorsal pores commences between segments 

 xi./xii. 



