On new Generic Names for some Entomostraca. oG7 



spine oil their upper surface near apex and with four shorter 

 spines arranged in pairs beneath. 



Long. 7 niillim.; exp. pronot. angl. 3 inillim. 



Hab. Dorej {Wallace, Brit. Mus.). 



Nabinm. 



Nahis suhcoleoptratus. 



Nabis suhcoleoptratus, Kirby, in Rich. Faun. Bor.-Amer. iv. p. 282 



(1837). 

 Nahis xanthopus, MSS., Walk. Cat. Het. vii. p. 143. 22 (1873). 



XLVIT. — New Generic Names for some Entomostraca and 

 Cirripedia. Bj Canon A. AI. NORMAN, F.R.S. &c. 



In preparing for publication a second edition of the Catalogue 

 of the Crustacea in raj collection and tracing the generic 

 names of the lower orders in that class I find that the 

 following changes are necessary. 



Cladoceea. 



Genus SiMOSA*, nov. nom. 

 = Simocep/ialus, Schcedler. 



Two genera named Simocephalus were published almost 

 simultaneously. The name was used for a genus of snakes 

 by Dr. GUnther in his ' Catalogue of Columbrine Snakes,' 

 the exact date of the publication of which, I learn from him, 

 was October 9, 1858 ; and the name was applied to a 

 genus of Cladocera by Schcedler in a paper read September 22, 

 1858, and as it was illustrated by a quarto plate, it is not 

 likely that it could have been published within so short a 

 time after the reading as October 9. 



Genus Ehynchotaloxa t, nov. nom. 



In 1861 G. O. Sars instituted a genus HarporJiynchus for 

 the interesting species he was describing — 11. falcatus ; but 

 that name having been previously (in 1848) employed by 

 Cabanis for a genus of birds, in 1884 C. L. Herrick substi- 

 tuted the name Leptorhynchus — a still more unfortunate 

 choice, for that name had been employed at least three times 

 previously, and it is therefore necessary to supersede it. 



* aiiioi, snub-nosed. 



t (ivy\u>T6s, hiivini^ a beak. 



