284 Duclos's Histoire Naturelk de Coquilles Univalves. 



for our palmicornis, but this has never more than from 33 to 35 

 rays, while his species has from 50 to 51." Mr Yarrell's specimen 

 was procured by Dr Johnston near Berwick. 



Tbe Pholis of Fleming is adopted. A new genus is formed from 

 the Blennius rostratus, Solander, a native of the new Guinea seas. It 

 is named from the large developement ofthe canine teeth, Blennechis 

 ((3Xzmg and £%/$,) and several undescribed species are added. Another 

 contains a single species, Bl. Bosquianus, Lacep. In these the charac- 

 ter of the gills of Blennechis are combined with a wide gape, but 

 with a single row of regular teeth on the outer part of the jaws on- 

 ly, and has been termed Chasmodes. The other genera admitted are 

 Salarias, remarkable for their moveable teeth, and 33 species 

 are described. Clinus, into which the Bl. argentatus, Risso, the 

 only European species will range. Myxodes, formed from a single 

 species, a native of the N. Holland seas, CI. Australis, Cuv. dif- 

 fering in having the first rays of the dorsal fin separated and ad- 

 vanced upon occiput in the manner of a crest. Cirrhibarbes, a na- 

 tive of the seas of South Africa. Tripterygion j Tript. nassus, Ris- 

 so, a native of the Mediterranean, is typical ; the dorsal fin is di- 

 vided into three parts or divisions. Gidnellus, Zoarces, Anarrhichas, 

 of the latter a second species A. leopardus, Agass. is admitted on 

 the authority of a single specimen in the collection of Munich : and 

 Opisthognalhus, of which a single species, scarcely perfect, was known 

 to Cuvier, on the publication of the Regne Animal. Another has 

 since been discovered from the coast of South America, and is dedi- 

 cated to the Baron. — Opist. Cuvierii, Val. 



Histoire Naturelle Generale et Parlicidiere de tons les Genres de 

 Coquilles Univalves marines a I'etat vivant et fossiles, publie par 

 monographies. Par P. L. Duclos. Genre Olive, i. ii. Livraison. 

 Paris, 1835. Folio. 



The two parts published contain eleven plates, on each of which 

 several species of the genus are figured. They are beautifully exe- 

 cuted, but, from the expensive style in which the work is brought 

 out, it is to be feared that even the genus now being published will 

 never be finished. The text consists merely of a tabular list of the 

 species to be figured, and an index, occupying in all two leaves. 

 —J. E. G. 



Observations on the Genus Unio, together with descriptions of new 

 Genera and Species in the families Naiades, Concha*, Columacea, 

 Lymnceana, Melaniana and Perislomiana. By Isaac Lea. 4to, 

 Philadelphia, 1836. 

 This work consists of four papers, published at intervals in the 



