DESCRIPTIONS OF GENERA AND SPECIES 497 



complete. Clitellnm, XIII XVIII. Setae distant, ventral closer to each other than 

 dorsal. Male pores between setae i and a. No genital papillae. No dorsal pores. 

 Gizzard in V; no calciferoiis glands; intestine begins in XFIL Nephridia paired, 

 alternate. Testes in X. Sperm-sacs in XII. Spermathecae in VI IX, without diverticula. 

 Rob. Queen Charlotte t Island, British Columbia. 



The anatomy of this species is fully illustrated by BENHAM. 



Genus CRYPTODRILUS, FLETCHER. 



Syn. Megascolides, SPENCER (in part.). 



DEFINITION. Nephridia usually diffuse. Last pair of hearts in XII. Spermiducal 

 glands lobate, rarely furnished with penial setae. Male pores upon XVIII. 



I have already stated the reasons which lead me to divide somewhat differently 

 from either FLETCHEE or SPENCER the total of the species which those authors refer 

 to the two genera Cryptodrilus and Megascolides. It appears to me, after consideration 

 of the various structural features which characterise the family Cryptodrilidae, that 

 the form of the spermiducal glands is rather more important than the variations 

 offered by any other organs. The genus Cryptodrilus as defined here contains species 

 with, and species without, a diffuse nephridial system. It might be held that these 

 species should be referred to different genera ; but it is not possible in the present 

 state of our knowledge to discover from the descriptions any other characters which 

 vary coincidently with the nephridia. There are, in fact, only seven species of 

 Cryptodrilus which possess paired nephridia. It is highly possible that Cryptodrilus 

 canaliculutus may not be a Cryptodrilus in the sense that the genus is here defined ; 

 but as no information about the spermiducal glands is to be found in FLETCHER'S 

 account of the species it is impossible to be certain. For the present, therefore, and 

 it must be understood that I lay no claim to have devised anything like a permanent 

 arrangement, I shall include within this genus Cryptodrilus all the remaining 

 Cryptodrilids with lobate spermiducal glands opening on to segment xviii. 



In the accompanying table the species are arranged according to the spermathccac 

 and sperm-sacs, which will perhaps facilitate their identification. In the six species 

 with only one pair of sperm-sacs there are generally, but not always, only one pair of 

 testes and funnels. 



3 s 



