A REVIEW OF THE MYSIDACEA 



47 



identified by Sars as Boreomysis scyphops. Willemoes-Suhm also 

 described the female of this species as the female of Petal ophthalmus 

 aivniger (1875), and Faxon (1893), recognizing that the supposed 

 females of P. amiiger were in reality specimens of Boreomysis, sug- 

 gested the name Boreomysis suhmi for the species. Hansen (1908a) 

 arrived at the conclusion that the Challenger specimens attributed to 

 B. scyphops were in reality different from that species and he renamed 

 them B. distinguenda, without reference, apparently, to the history of 

 the species. It is true that Willemoes-Suhm did not publish any de- 

 scription of the species to which he gave the name Petal ophthalmus 

 inermis, and it would, perhaps, be legitimate to ignore his name as 

 a nomen nudum. In my view, however, since it is possible to identify 



Figure 6. — Boreomysis nobilis G. O. Sars: a, Dorsal view of anterior end; b, antennal scale; 



c, telson. (Afer G. O. Sars.) 

 the specimens to which the name was given definitely with those de- 

 scribed and recorded in the Challenger report as B. scyphops, the 

 name inermis should be applied to the species, and, since it is the 

 earliest name it should be given priority over the later names suhmi 

 and distinguenda. Hansen (1910, p. 26) described a new species of 

 Boreomysis as B. inermis, and if the specific name inermis is used for 

 B. distinguenda, Hansen's species will require a new name (see p. 58). 



BOREOMYSIS NOBILIS G. O. Sars 

 FlGUEE 6 



An American species not represented in the National Museum col- 

 lection. The species is recorded on page 213. 



