56 Genera of recent and fossil Shells. 



It is said to inhabit the marshes in the isle of Ely and Huntingdon- 

 shire, and to be found on the flowers of the golden rod at the end of 

 August. Polyommatus (/;o/j/*, many, owwna, eye). Six species, none of which 

 are very common. 



Sowerbi/y George Brettingham, F.L.S. Collector of objects of Natural His- 

 tory, and general Agent and Salesman in articles of this description, re- 

 siding at No. 156. Regent Street, London : The Genera of recent and 

 fossil Shells, for the use of Students in Conchology and Geology. With 

 original Plates, drawn and engraved by J. D. C. Sowerby, F. L. S. Lon- 

 don. In 8vo Numbers, monthly. 45. plain ; 6s. highly finished in colours. 

 Of this very beautiful work thirty numbers have appeared. The nomen- 

 clature followed is generally that of Lamarck ; but some alterations have 

 been made in the species, and some new genera formed by the author. 

 The species are not arranged according to any system ; but, each plate 

 having a distinct page of letter-press, the whole may be methodised, when 

 completed, at the pleasure of the purchaser, or according to the system 

 which may be thought best at the time. In short, by this plan of pub- 

 lishing, which is also that of the botanical periodicals, the plates may 

 undergo, in the course of their duration, as many modifications of arrange- 

 ment, as the shells themselves in a cabinet. One great advantage of it is, 

 that it never compels the author to figure from a bad specimen, in order 

 to go on regularly with his system ; neither is he likely to be so hurried as 

 he otherwise would be, in order to produce the work regularly ; and the 

 consequence is, that the execution of the plates in this work, is of the very 

 first order of merit. 



No. XXX. for April, contaim 



Fasciolaria {fasciola, a winding band j small folds near the base of the 



columella, or neck,) aurantiaca. Triton (the sea god ; beauty of the shell). 



Six species from the West Indies and islands of the South Seas. Ji^urex 



{murcx, the point of a rock ; resemblance). Three very singular species : 



M. haustellum, so named on account of its remarkably elongated canal ; 

 M. cervicornu, alluding to the stag's-horn-likc protuberances with which 

 it is covered; M. phyllopteris, from its leaf-like appendages; M. tenui- 

 spin6sus(^g. 25.), from its slender spines; ilf. scorpio (^g. 26.) from the 

 scorpion-like apices of its fronds ; and M. melanamathos, from its black 

 fronds. " The species of the genus Murex are numerous, and many of 

 them are very beautiful and singular. The long-pointed and regularly 



