MOLLUSCA. 215 



page and index are supplied. At p. 189 the author pro- 

 raises to give, in the second volume, a complete, methodical 

 review of the Swiss Gasteropoda. There will thus be a 

 second volume. 



H. Scholtz has published a Memoir : (Schlesieus Land-mid 

 Wasser-Mollusken, systematise!! geordnet uud beschrieben.) 

 A Systematic Arrangement and Description of the Land 

 and Fresh-water Mollusca of Silesia. Breslau, 1843, 8vo. 

 This praiseworthy contribution to the Fauna of Silesia, shows 

 that the author has spared no pains to render his work as 

 complete as possible. He has described in it 128 Mollusca, 

 two of which are new (Helix Charpentieri and Pisidium 

 roseum). With each species is given the Latin and 

 German name, a German diagnosis, the synonymy, a 

 description of the shell and of the animal, and a parti- 

 cular account of the locality in which the species occurs. 

 The ova, also, are frequently described. There are no 

 figures. 



A valuable contribution to the Molluscous Fauna of 

 New Holland has been furnished by Menke : Molluscorum 

 Novse Hollandise, specimen, &c. Hanover, 1843. In this 

 Avork the author enumerates 263 species of Mollusca, col- 

 lected by Preiss, in the south-west of New Holland, and 

 amongst which 64 species are described as new. Brief de- 

 scriptions, but no figures are given. Menke himself, after- 

 wards, in his ' Malocozoological Journal/ reviews this state- 

 ment, and after comparison with some conchyliological 

 works, declares twelve of his new species to have been 

 already described, so that only 48 new species remain. 



Carpenter has communicated to the Royal Society a 

 paper on the microscopical structure of the hard parts of 

 the Invertebrata, the first portion of which refers to the 

 shells of the Mollusca. He found shells, with a prismatic 

 cellular structure, as Pinna, which are composed of nume- 

 rous depressed, hexangular, calcareous prisms ; others, which 

 consist of a membranous shell-substance without cellular 

 tissue ; thirdly, some of a nacreous substance ; and 



