Earthworm f ruin Ecuador. 245 



of tcsfos and ciliateJ rosettes lying iu somites xi. and xii., as 

 dctcnniiicd by tracing out tlie nepliridia and other organs ; 

 but tlicy come to lie at the level of two somites t'lirtlier back, 

 l^'^acli ])air of tcsti's and rosettes is contained in a common 

 transversely-placed sac extending below tlie gut — the " tes- 

 ticular sac" [t.s.) as we may term it (the " Sameidvupsel " of 

 JJergli, the " median seminal vesicle" of some authors). 



The anterior sperm-sacs arise from the sides of the anterior 

 " testicular sac," and the posterior sperm-sacs from the poste- 

 rior testicular sac. Ilorst describes a similar arrangement, 

 though, as in the case of the other organs of R. Tenkatai^ he 

 refers tiiem to a more posterior position than in the present 

 species. JJeddard tinds the same arrangement and position for 

 these sacs in his si)ecies. Perrier found only one pair of sperm- 

 sacs and ciliated rosettes, lying " immediatement en arri^re du 

 gesier." But in neither of these species is any mention made 

 of the sperm-sacs extending beyond the segment in which 

 they arise; they appear to be limited to one somite in each 

 case ; and the condition here described recalls that usual in 

 the allied family Geoscolecida3, mihi, viz, in Geoscolex^ Uro- 

 cliata, and Diachata, where each sperm-sac extends through 

 at least four and usually more somites. 



The sperm-ducts were easily traceable from the funnels to 

 the body- wall, and, as I have stated above, open externally 

 on each side between somites xix. and xx. 1 could find no 

 ovaries, although I looked carefully for them ; Beddard and 

 Horst found them in the normal position, viz. somite xiii. 



There are four pairs of spermathecte (spth.) concealed by 

 the pharynx [? perhaps that is the reason why Perrier found 

 none ; he would have expected them rather more laterally 

 placed than is the case] and lying in somites v., vi., vii., and 

 viii. ; each is a nearly globular sac, with a narrow muscular 

 duct, sharply sc])arated from the sac, and passing to the 

 external aperture on the anterior margin of the somite ; these 

 pores lie in the same line as the nephridiopores. On the left 

 side of the specimen an additional very small spermatheca 

 occurs in somite iv. 



In R. Tenkatei there are three pairs of long pyriforni 

 spermatheca) in somites vii., viii., and ix., wiiereas in R. 

 Guliehnus there is only one pair of " spherical or pear-shaped 

 pouches " in somite vii. 



For the purpose of ready comparison with the other species 

 I will summarize the characters of R. ecuadoriensis : — 



1. Length 7*5 centim. 



2. Clitellum on somites xiv, to xxv. ; tubercula on souiites 



XX. to xxv. 



