NOTOPYGOS. 25 



Key to Genera. 



a. Branchiae arborescent. 

 b. With no caruncle, 

 c. Branchiae only on the anterior somites; dorsal and ventral cirrus present on the first parapodia, 



rudimentary on others Puramphinome Sars. 



bb. With a caruncle. 



c. Caruncle much reduced. 



d. Neuropodial setae bifurcate. 

 e. Caruncle of three small lobes in a transverse row, not extending beyond the first somite 



and preceded by a median tentacle; eyes none Benthoscolex Horst. 



ee. Caruncle a flexuous crest with short lateral folds, reaching third or fourth somite; eyes 



present Eurylhoe Kinberg. 



dd. Neuropodial setae not bifurcate, simply hooked. 



Caruncle tongue-shaped or cordiform; notopodial setae partly serrate along two sides, 



harpoon-shaped, partly more elongate, spinose Amphinome Bruguifire. 



cc. Caruncle well developed. 

 d. With dorsal cirrus single, 

 e. Caruncle without crest or folds, a few transverse grooves, narrowed caudad; eyes none. 



Sangiria Horst. 

 ee. Caruncle not so. 



/. Caruncle very large, heart-shaped, with the lateral branches diverging caudad. 



Pherecardia Horst. 

 //. Caruncle of more moderate size, not cordate. 



g. Caruncle with lateral branches diverging cephalad Hermodice Kinberg. 



gg. Caruncle not so. 



h. Dorsal setae harpoon-like, a double series of retrorse teeth; caruncle with lateral 



branches diverging caudad Pherecardiles Horst. 



hh. Dorsal setae simply bifurcate; caruncle weakly transversely plaited, true lateral 

 branches not evident; branchiae small, with few filaments .... ParacMoeia Horst. 



dd. With a dorsal and an intermediate cirrus Notopygos Grube. 



b. With no caruncle Hipponoe Audouin and Edwards. 



bb. With a caruncle. 



c. With a single dorsal cirrus. 



d. Eyes present; neuropodial setae smooth Chloeia Savigny. 



dd. No eyes ; neuropodial setae coarsely serrate along inner border .... Bathychloeia Horst. 

 cc. With a dorsal cirrus and an intermediate cirrus Chlocnea Kinberg. 



Synonymy of Genera. 



Didymobranchus Schmarda is too imperfectly known at present to be 

 placed with certainty. Eucarunculata Malaquin and Dehorne (1907) is synony- 

 mous with Pherecardia Horst (1886). Cryptonota Stimpson and Oniscosoma 

 Sars are the same as Spinther Johnston, type of the amphinomoid family 

 Spintheridae, not represented in the present collection. 



NoTOPYGOS Grube. 



Archiv. naturg., 1855, 21, p. 93; Annulata Semperiana, 1878, p. 7. 

 Lirione Kinberg, Ofvers. K. vet. akad. Forh., 1857, 14, p. 12. 



Notopygos was used by Grube in 1850 in his tjbersicht der annelidengat- 

 tungen und arten (p. 21) but without mention of any species, and again in 1851 



