466 THE ANNELIDA POLYCHAETA. 



Synonymy of Genera. 



Eisig in his monumental work on the Capitellidae (Monog. 16 Fauna flora 

 Golfes Neapel, 1887, p. 810, 814) divided Notomastus into two subgenera to 

 which he applied the names respectively of Clistomastus and Tremastomastus 

 Eisig. However, since the second division contains A^". latericeus Sars {Capitella 

 rubicunda Keferstein and Arenia cruenta Quatref ages) , the type of the genus, 

 that division must be known as Notomastus sens. str. and Tremastomastus sup- 

 pressed as its synonym. 



DasymaUus was proposed as a genus by Grube in 1846; but as the name 

 had previously been used in Coleoptera (1834) he replaced it with Dasybranchus 

 (1851). 



Ancistria Quatrefages (1865) is the same as Heteromastus Eisig (1887); 

 but as Ancistria was earlier in use for a genus of Coleoptera (1845) Eisig's name 

 must be used. 



Valla Johnston is a synonym of Capitella Blainville. 



Capitellides Ehlers (1907) is preoccupied by Capitellides Mesnil (1897) 

 and is accordingly here replaced by Capitellethus, nom. nov. 



Notomastus Sars. 



Nyt. mag. naturw., 1851, 6, p. 199; Eisig, Monog. 16 Fauna flora Golfe Neapel, 1887, p. 807. 



Arenia Quatrefages, Hist. nat. annelcs, 1865, 2, p. 250. 



Sandanis Kinberg, Ofvers. K. vet. akad. Forh., 1865, no. 4, p. 343. 



Notomastus latericeus Sars. 



Nyt. mag. naturw., 1851, 6, p. 199; Eisig, Loc. cit., 1887, p. 861; McIntosh, British annelids, 1915, 3, 



pt. 3, p. 276, pi. 92, fig. 1, pi. 98, fig. 19, pi. 107, fig. 9-9b. 

 Capitella rubricunda Keferstein, Zeitschr. wiss. zooL, 1862, 12, p. 123, pi. 11, fig. 7-18. 

 Arenia cruenta Quatrefages, Hist. nat. annelcs, 1865, 2, p. 250, pi. 11, fig. 16-23. 

 Sandanis rubricundus Kinberg, Ofvers. K. vet. akad. Forh., 1865, no. 4, p. 343. 

 Notomastus rubricundus Eisig, Loc. cit., 1887, p. 863. 

 N otomastus Jerlrilis Eisig, Loc. cit., 1887, p. 819, pi. 1, fig. 1. 



Locality. A fragment labeled Albatross, 1886. Probably from New 

 England. 



Sabellidae. 



In this family the body is divided into two distinct regions, an anterior, or 

 thorax, most usually consisting of nine somites, in which the parapodia have the 

 notopodial fascicles of cai)illary setae with uncinigerous tori ventrally, and an 



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