On the anatomy of Ocnerodrilus. 



No gland, albuniinifera '). 

 No exterior penis. 



RHYNCHELMIS Hofi-mkistek 1843. 



i^lin.: 1843, lilii/nchebin's, Hoff.meistek, Arch. f. Xatuigcscli. .Tahrg. 9. Bii. 1. pasç. 183. 

 .. 1844, Kaa.fes, Giiube, Arcli. f. Naturirescli. lid. 10. pag'. 204. 

 » l.sTC, Jlhipirhdnu.'^, Vf..ii)()vskv, Zeitsclii-. f. wis?. Znol. Bd. X.WII pag. 332. 



Tilt' dorsal iiessel is not brandling; no hearts. 



The vimtral vessel is forked in the 4"' setigerous segment. 



The dorsal lateral vessels two pair in every segment: the anterior, 

 not feathered, is gastric, the posterior, feathered, is perigastric. 



The efferent diiet.'^ enter an atrium, which is an all sides sur- 

 rounded by prostate glands, and opening in the 9*'' setigerous segment. 

 No exterior penis. 



The testes one jjair, in 13"' to 50"" segments. 



The oviducts between tlie 10"' & 11"' segments. 



The ovaries one pair, in .^0*'' to .')1"' segments. 



The receptacles in the 7"' segment. 

 •A large glandula albuminifera in the 8"' segment. 



STYLODRILUS Clai-arkde 1862. 



A'////.: 1862, Sti/liiilrilxs ('i,Al>.\itKl)R 1. c. pag. 47. 



The dorsal vessel is entire as in the preceding genus, and not 

 furnished with hearts. 



The ventral vessel is forked in the 4"' setigerous segment. 



The dorsal lateral ve-'^sels are not feathered, in every segment two 

 ]iair, Iff which the anterior is gastric and the posterior perigastric. 



The efferent ducts are not grown together, and enter an atrium, 

 which is on all sides surrounded by prostate glands, and opening in the 

 9"' setigerous segment. A large exterior penis. 



The testes are throe, but not in pair; one is situated in each of 

 the segments 7, 9, 11 and 12. 



') As it therefore is likfly, that the worms studied by 1>ATZel, VE.ii)OVfKY and 

 others, and by them referred to the genus Lumhrindtiti, have really belonged to quite 

 different, and as Vejdovsky suggests even new genera, have I here retained all char- 

 acteristics given by Ci-apakede, not withstanding the opinions of later investigators. 



