188 Dr. Maton's and Mr. Rackett's 



measure compensating for imperfections in the descriptive part. 

 It is a work that deserves to be more generally known than it 

 seems hitherto to have been in this country; and as the figures 

 are both original and accurate, they ought to be more commonly 

 quoted. 



Among the Mem. Etrang. de I'Acad. des Sciences we find an ex- 

 cellent account of Mytilus lithophagus, written by 



FOUGEROUX. 



This account is illustrated by a beautiful plate, which exhibits 

 very accurately the nidus, shell, and structure of the animal. 

 The 9th volume of this same work contains a memoir by 



DE LA FAILLE, 



" stir VOvigine des Macreuses," In which a full refutation is given 

 of the strange story of the Barnacle Goose, and there is a large 

 figure of the well-known shell originally supposed to produce it. 

 This was a subject on which it was scarcely worth while for a 

 writer of so late a period to employ any pains. 



GEOFFROY 



merits mention among writers on the Testacea for his " TraitS som- 

 maire des Coquilles taut fluviatilcs que terrestres qui se trouvent ttux 

 Environs de Paris." The number of species described is forty-six, 

 which are included in seven genera; and the system is the author's 

 own, though not materially different from that of Linnaeus, ex- 

 cept that more attention is paid to the animal itself than in the 

 works of the latter. The specific descriptions are given in Latin, 

 but the bulk of the work is in the French language. An artist of 

 the name of DUCHESNE published three plates of Fresh-water 

 and Land Shells, which form a good accompaniment to these 



descriptions 



