Earthicorms of the Vienna Museum. 121 



fig. 8), that, as in Antens^ the distal extremity of cacli seta is 

 ornanK'iited by .sli<;lit ridges with a jae'gcd outline. The setaj 

 present tlie same character on the clitellum and at the poste- 

 rior cxtremify of tiie body. I may remark that it is not 

 always easy to detcet the ornamentation of the seta3. It is 

 jiot sufficient to strip off a bit of the cuticle and then to 

 examine under the microscope the cuticle and the setaj that 

 have been accidentally detached in tearing it off. The cuticle 

 itself in such a case frequently obscures the markings on the 

 setoj. 



The seta3 must be picked out one by one ; this is quite 

 easy with a large species like Geoscolex maximus ; when the 

 body is opened the cavities where the set£e are planted are 

 seen to be very large, and the sctai can be readily seized with 

 the forceps and detached. 



The nephridia open, as i^errier and Leuckart stated, in 

 front of the ventral setie ; they have a large muscular vesicle. 



In the anterior region of the body the nephridial duet passes 

 straight from the tuft of tubules to the external pore ; in the 

 hinder region this duct is bent upon itself, but there is no 

 crecum such as is found in Anteus. The nephridia there- 

 fore show only the very slightest traces of the specialization 

 into an anterior and a posterior series that is found in Anteus. 

 The funnel, as in other earthworms, depends into the segment 

 in front of the one in which the nephridium lies. 



The sperm-sacs are long and were doubled upon themselves 

 in the specimen which I examined. The vas deferens where 

 it leaves the sj)erm-sae runs at first forwards and downwards 

 side by side with the duct of a nei)hridium ; it opens into a 

 large mur-cular sac whicli occupies three or four segments and 

 is constricted where it passes through the mesenteries. I did 

 not notice the three bands figured by Perrier* attached to the 

 atrium. 



There are, as Terrier has stated, no spermatheeaj. 



(3) ^^Perichceta Itucocycla.^'' 



The collection contains a number of individuals labelled 

 with this name. One smallish individual (no. 16) is evidently 

 the type figured by ISchmarda. Being quite immature, it is 

 impossible to be absolutely certain whether it is really iden- 

 tical with a large individual measuring 37 inches in length, 

 which has a similar label. So far as it was possible to form 

 an opinion from the arrangement of the setaa (which show 

 dorsal and ventral gajjs) and from the general appearance of 



* Loc. cit. pi. i. fig. 15, 



