new Earthworms in the. British, Museum. 287 



colouring is zebra-like on the back, there being large brown 

 bands which alternate with the light chfetal bands ; these 

 brown bands are widest dorsally, in correspondence with the 

 dorsal gaps, and are laterally evanescent. 



The prostomium is short, its dovetailed portion extends 

 over § of the first segment. 



The seta3 are closer together ventrally than dorsally ; they 

 number 48 on segment xii., 60 on xxv. There are no seta? 

 on the clitellum, which occupies the three usual segments. 



The male pores arc in a line with setse 6-7 and are sepa- 

 rated by 8 setse ; these pores are not placed on prominent 

 porophores and appear only as short slits with slightly granu- 

 lated margins. 



The oviducal opening is placed on a small oval tubercle 

 contoured by a slight furrow. 



There are four pairs of spertnathecal openings between 

 somites 5-6, 6-7, 7-8, 8-9, in a line with seta 8. 



The first dorsal pore opens between somites 12 and 13; 

 no copulatory papillae. 



None of the septa are thickened, two (the 8-9 and 9-10) 

 are wanting. 



The gizzard is bell-shaped, occupying nearly the whole 

 length between septa 7-8 and 10-11. 



Two simple cteca arise from the intestine in segment 26 and 

 are seen to lie transversely on its dorsal surface in segment 25. 



The sperm-sacs in segments 1 1 and 12 are thick, tongue- 

 shaped, and not lobate, save for a very small terminal lobe. 



The prostates are not large, between discoid and crescent- 

 shaped, incompletely divided by a transverse groove. The 

 ejaculatory duct arising from their notch is very short and 

 slightly sigmoid, terminating in a spherical bulb. 



The main sac of the oval sperm athecse is anteriorly 

 enlarged ; its duct is short and thick and gives off from the 

 inner side a tubular diverticulum, ending in a slight dila- 

 tation ; this diverticulum (which is usually bent at an angle) 

 is, if straightened out, equal in length to the main poucli with 

 its duct. 



This species seems to come near to P. Floiveri*, Benh., 

 which ; however, differs externally, having a clitellum pro- 

 vided with seta? (on the 16th segment) and not stretching 

 over the whole of segments 14 and 16. P. Floweri differs, 

 too, in the number of the setse, which on the xxvith 

 segment only amount to 45, while in our species they number 

 on the xxvth segment as many as 60. The internal differ- 

 ences consist in the absence (in P. Floweri) of a muscular 

 * Journ. Linn. Soc, Zool. vol. xxvi. p. 217. 



