284 Duclos's Histoire Naturelle 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. 
The 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 of the canine teeth, Blennechis 
(jSXswog 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, Cl. 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 ; Tript. nassus, Ris- 
so, a native of the Mediterranean, is typical ; the dorsal fin is di- 
vided into three parts or divisions. Gulnellus, 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 
Opisthognathus, 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 Generate et Parliculiere de tons les Genres de 
Coquilles Univalves marines a I'etat vivant et fossiles, public par 
jnonographies. 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 Unto, together with descriptions of new 
Genera and Species in the families Na'iades, Concha?, Columacea, 
Lymnceana, Melaniana and Pcrisiomiana. By ISAAC LEA. 4to, 
Philadelphia, 1836. 
This work consists of four papers, published at intervals in the 
