188 ON A COLLECTION OF EARTHWORMS FROM NEW BRITAIN, THE 



the neighbourhood of the male pores and suggest those of Perichaeta papulosa 1 . The 

 papillae are small sucker-like structures like those of Perichaeta upoluensis, not large 

 flat papillae like those of P. sedgwickii. They have the following arrangement. On 

 segment XVII are a pair lying side by side and close to the anterior boundary of the 

 segment. Exactly corresponding to these in position are a pair on each of segments 

 XVIII and XIX. On the border line of segments XVII and XVIII (this boundary 

 line is not marked on the ventral side of the body) are two papillae on each side, 

 and to the outside of, and wider apart from each other than are the median papillae 

 already spoken of. Two papillae lie just to the inside of each male pore one above the 

 other, and finally a papilla lies to the outside of and in line with the male pore. 



The male pores are not near together; but there appear to be only four setae 

 between them ; these however do not occupy the entire space between those pores 

 but lie in the middle of the area. 



The gizzard has the form of a truncated cone, being narrower anteriorly than 

 posteriorly. Caeca are present. 



Two particularly strong septa follow the gizzard, enclosing between them the 

 Xlth segment. 



The last hearts are in segment XIII. 



The sperm sacs lying in XI, XII are unusually small, not very much larger 

 indeed than the egg sacs in XIV. The spermiducal glands lie in segments XVII, 

 XVIII, XIX ; they are rather bean-shaped and not greatly broken up into lobes and 

 lobules. From the hilum runs the short stout duct unprovided with any terminal 

 sac. The spermathecae are two pairs in VIII and IX ; the diverticulum is long and 

 stout, and those of the anterior pair lie in the Vllth segment. The diverticulum 

 has a distinct duct and is longer than the pouch. 



Perichaeta Solomonis, n. sp. 



Of this rather large new species of Perichaeta the collection contained two 

 examples from Narowol, Solomon Islands, and a third specimen from Rubiana, 

 New Georgia, Solomon Islands. 



The species is of a rich brown colour, becoming purple on the dorsal surface 

 anteriorly ; whitish lines mark the implantation of the setae. 



The largest specimen measures about 140 mm. in length by 9 mm. in greatest 

 breadth ; it consists of 90 segments. 



The clitellum is not that of typical Perichaetae. In the larger specimen it em- 

 braces only half of the XlVth segment, the XVth and the XVIth. There is a complete 

 circle of setae on segment XVI. In the second specimen from Narowol the clitellum 

 is more restricted still ; it occupies only half of XIV and the whole of XV. 



The genital papillae (Fig. 1) are numerous and characteristic. But here again, as is 

 so very usually the case, there is some variation from individual to individual. In all 



1 Rosa, I lombriohi raccolti in Sumatra, Ann. llus. civ. Genova (2), xvi. p. 525. 



