252 W. B. BENHAM. 



Spermathecse.^ — Three pairs in Somites vi, vii, and viii, 

 opening at the posterior edge of the somites. 



Gizzard in Somite yi ; uo accessory glands or cseca. 



Septa in anterior somites strong as in the other two genera. 



Nephridia large^ the duct simple without a caecum. Those 

 of the first pair^ which open externally in Somite iii, are much 

 larger than the rest ; the coil of tubules compact, and having 

 a glandular appearance. It no doubt serves as a " pepto- 

 nephridium." I have not observed any funnel to this first 

 nephridium.] 



Species 1. D. thomasii, W. B. B., 1886; St. Thomas, W. 

 Indies. 



See Benham, * Quart. Journ. Micr. Sci./ xxvii. 



Remarks on Geoscolecidse. 

 I have divided Rosa's family of this name into two families, 

 retaining his name to include three genera which agree closely 

 with one another, especially in having a single pair of testes 

 and sperm-sacs. But the structure of the nephridia do not here 

 serve as a family character, since the caecum of Geoscolex 

 is not present in other two genera. 



The position of the male pores is noticeably different from 

 that in most other families, and resembles that in the Rhino - 

 drilidse. 



The fact that Perrier's worm Tit anus is identical with 

 a worm described by Leuckart some thirty years before was 

 apparently discovered by Rosa, who pointed out the curious 

 agreement even in the words used by these two zoologists in 

 their description of the worm. 



b. The eight setge are in couples and exhibit no alternation 

 in their arrangement. There are two or more pairs of 

 sperm-sacs. 



Family VIII. Rhinodrilidae, mihi (= partly L. intraclitel- 

 liens, E. P., partly Eudrilidae, Glaus, Vejdovsky, Rosa). 



The eight setae are in four couples, the individual setie of 

 each couple being close togetiier. 



