1902.] NEW SPECIES OF EARTHWORMS. 199 



is continuous with that lining the oviduct. At the sides this 

 epithelium thins out and apparently disappeai's. Near to the 

 oi'ifice of the ovidvict into the spermathecal sac, the tall granular 

 cells disappear, so that there is a perfectly open oviducal funnel. 

 At the actual opening of the funnel, the columnar cells are raised 

 to form a lip sui-i'ounding the lumen. There can be no question 

 therefore about the termination of the oviduct Avithin the sper- 

 mathecal sac in a funnel-like expansion. I could not, however, 

 detect any cilia upon the epithelium. 



(3) POLYTOREUTUS BETTONIANUS, n. Sp. 



Of this new species two individuals, of which one is fully adult, 

 were collected at Lagari, Bi-itish East Africa, by Mr. Stuart 

 Betton. The worms were rather softened, so that the following- 

 account of their structure is not so full as it might otherwise have 

 been. 



The mature individual is incomplete at the posteiior extremity ; 

 it measures 77 mm. by 5 mm. in diameter. The immature speci- 

 men is 93 mm. long. The colour (in alcohol) is of an uniform 

 grey. The prostomium is procheilous, fitting into the concave 

 anterior margin of the peristomial segment. The setse show the 

 usual arrangement met with in Polytoretdus. The clitellum 

 occupies segments xiv.-xvii. entirely and about one-third of 

 segments xiii. and xviii. The male pore is boiiie upon a j)rominent 

 papilla and is intersegmental, xvii./xviii. The female pore lies 

 between segments xviii. /xix. Thei-e are no papillae of any kind. 



The alimentaiy tract and vascular system appear to be as in 

 other species. The sperm-sacs of this species are unusual in their 

 character. They are more normal speaking generally, but less 

 normal for this pai-ticulai- genus Polytoreutus. In eight out of the 

 twelve species already known and in the two species which have 

 been dealt with in the present communication, the sperm-sacs 

 commence as thin strands which pass back for a considerable 

 distance before they acquire the more capacious dimensions 

 usually associated with the sperm-sacs of earthworms. In Poly- 

 toreibtiis hettonianus the sperm-sacs are as wide at their com- 

 mencement as they are in any part of their coui'se. Coupled with 

 this increase in diameter is a deci'ease in length. The sperm-sacs 

 of the present species reach hai'dly further back than the point of 

 opening of the spermiducal glands. The sperm-sacs ai'e plump 

 and sausage-shaped, of greater calibi-e than the spermiducal glands ; 

 they are marked by one or two deep constrictions. The two 

 sperm-sacs are perfectly independent, and are not fused or even 

 approximated posteriorly. 



The spermiducal glands are about 14 mm. long; there is 

 nothing remai'kable in their form. Each gland is furnished with 

 a narrower duct. A bursa propulsoria is practically absent. The 

 female apparatus is constituted upon exactly the same plan as 

 that of the two sjDecies just described. There is no bursa copu- 

 latrix. The spermathecal sac itself is single and median, without 



