499 



(Van Name) (= Tethyum atlanticum Van Name 

 1912). 



Spinules well developed. 



In this genus there are two short species, — 

 B. atlanticus (Van Name) and *B. longitubis 

 (Traust. andWeltn.); and one stalked species, 

 — B. clava (Hrdmn.). The first two species 

 have only two gonads on each side. The last 

 species has been reported as having sometimes 

 two and sometimes more than two. Possibly- 

 distinct species have been reported under the 

 one name. The matter requires investigation. 

 (ßÖTQvg, a bunch of grapes and oq%iç, a testis.) 

 A 2 . Gonads few and large or numerous and small. 



Testes placed between the ovary and the body wall (Figs. II and 

 V, 3). 



Ducts of testes pass from both sides of ovary to form the vas de- 

 ferens. 



Atrial velum variable, narrow or broad. 

 Atrial tentacles in a single row at base of velum. 

 Spinules imperfectly developed or absent. 



Fi. Only one gonad, which is situated on the 

 right side. 



Genus Bendrodoa McLeay. Type, — B. 

 aggregata (Rathke). 



Pharyngeal folds more or less rudimentary 

 (usually). 



Surface smooth or rough. 

 Of ten species referable to this genus, I have 

 examined only two, — B. carnea (Agassiz) 

 and B. tuberculata Ritter. As has been in- 

 dicated by Hartmeyer and Van Name, 

 the genus is readily divided into two groups, 

 one consisting of the species *grossularia, 

 carnea and *uniplicata, having an unbran- 

 ched gonad and very much reduced pharyn- 

 geal folds (this might be considered a sub- 

 genus and Traustedt's name Styelopsis 

 retained for it), and the other consisting of 

 the remaining species, having a branched 

 gonad and the pharyngeal folds less re- 

 duced. 



32* 



