186 THE ANNELIDA POLYCHAETA. 



Psamathe cirrata Keferstein, is now considered the same as Johnston's fusca 

 {Cf. Mcintosh, British annehds, 1908, 2, pt. 1, p. 128). Halimede Rathke (1843) 

 is also the same and is, moreover, preoccupied in the Crustacea (Haan, 1835). 

 CastaUa Savigny, the earliest of these names, is unfortunately antedated by 

 Castalia Lam. (Moll., 1819). The next available name is Psammate Sars, a 

 revised form of Psamathe, and is accordingly here used. 



Mania Quatrefages is the same as Podarke Ehlers, the supposed difference 

 in number of tentacular cirri being due to error. 



Magaha Marion and Bobretzky is synonymous with Syllidea Quatrefages, 

 its type species perarmata being identical with arviata Quatrefages, the type of 

 Syllidea. 



Harpochaeta Korschelt (1894) is regarded by Ehlers (Deutsch. tiefsee exped. 

 Valdivia, 1908, 16, p. 59) as the same as AncistrosylUs Mcintosh. 



Lamproderma Grube (1877), type L. longicirra Grube from New Britain, 

 seems from the description to be close to if not identical with Psammate. 



Hesione Savigny. 



Descript. Egypte. Hist, niit., 1809 [ = 1822], 1, pt. 3, p. 12, 39. 



Fallacia Quatrefage.-;, Hi.st. nat. annelcs, 1865, 2, p. 98. 



Telamone Claparede, Aiinelides Chctop. Golfe Naples, 1868, p. 231. 



Hesione pacifica Mcintosh. 



Challenger Annelida, 18S.5, p. 184, pi. 29, fig. 2, pi. 32, fig. 14. 



Locality. Society Islands: Bora Bora. Fringing Reef . 17 November, 1899. 



A single specimen about 23 mm. long, exclusive of the fully extended and 

 wholly smooth proboscis. The species was described originally from Tonga- 

 tabu in the Friendly Islands, having been taken off Nufalofa at a depth of 

 eighteen fathoms. 



Hesione genetta Grube. 



Plate 22, fig. 7, 8. 



Jahrcsb. f^cliles. ge.scllscli., 1866, 44, p. 63; Annulata Serapcriana, 1878, ]>. 1(11. 



The specimens have the usual sixteen parapodia-bearing somites. A repre- 

 sentative specimen is 21.5 mm. long and has a maximum width, exclusive of 

 the parapodia, of 4 nam. The body increases in length to the tenth parapo- 

 diferous somite, and then more gradually narrows caudad from the thirteenth or 

 fourteenth somite. The dorsum is moderately arched. 



