4 G. EiisEN, 



The oviducts are very miinite and t'niinelsliaped, opening in the 

 11"' segment. 



The ovaries are small, like those ot" Ocnerodrilas, situated in the 

 lO**" segment, and attached to the dissepiment between the 10"" and 11'" 

 setigerous segments. 



The receptacle resembles that ot" Lumhriculus, and opens in the 8*'' 

 setigerous segment. 



No glandula albaminifera. 



PHREATOTHRIX Vejdovsky 1876. 



Syn.: 1876, Phreatotliri.r Vejdovsky, Z. I', wiss. Zoolcifiic Bd. XXVU pag. .541. 



The dorsal vessel is entire and not furnished with hearts. 



The ventral vessel is forking in the 8*'' setigerous segment. 



The seccondary dorsal lateral vessels are in every segment of 2 

 kind, both branching. The anterior pair is gastric and connected with 

 the ventral vessel; the four to six posterior pairs are perigastric and not 

 connected with the ventral vessel. 



The efferent ducts are not grown together. Tlie}' enter an atrium, 

 which opens in the O"" setigerous segment, and which is surrounded at 

 the top by numerous prostate glands. An exterior and retractile penis 

 proper. 



The testes are one pair, tilling the whole bod}- between the 6"' and 

 the 15"' segments. 



The oviducts are very minute, situated in the 12"' setigerous segment. 



The ovaries are situated in the 10"' segment, and attached to the 

 dissepiment between the 9"' & the 10"' segments. 



The receptacle is wholly confined to the 10"' setigerous segment, 

 and behind the eff'erent ducts. 



No (jlandula alhuminifera. 



TRICIIODRILUS Cl.u'arkde 1862. 



jSi/ii.: 1862, Trichodi'iliis Claparkde 1. c. pa;;. .51. 



The dorsal vessel is not forked, liut entire, and not furnished 

 with hearts. 



The ventral vessel is forked in one of the anterior segments. 



