MOLLUSC A. 415 



Part 4 : Helix, Nerita, Trochus, Pyrula, Psammobia, Pecten ; 

 in Part 5 : Steganotoma and Cyclostoma, Fusus, Paludina, 

 Haliotis, TeHina, Venus ; in Part 6 : Glandina, Trochus, 

 Sigaretus, Haliotis, Cytherea ; in Part 7 : Helix, Bulimus, 

 Melania, Mactra, Cytherea, Venus ; in Part 8 : Cylindrella, 

 Trochus, Murex, Psammobia, Cytherea, Pecten. It appears 

 highly conducive to convenience, that with each genus the 

 month and year of publication are stated. Would that 

 French authors could be induced to attend to this little pre- 

 caution ! Their Livraisons frequently appear altogether 

 without the date of the year. 



In the year 1838 a work was published by Potiez and 

 Michaud, under the title ' Galerie des Mollusques, ou Cata- 

 logue methodique, descriptif et raisonne des Mollusques et 

 Coquilles du Museum de Douai.' The first volume contains 

 the Cephalopoda, Pteropoda, and Gasteropoda, a considerable 

 portion of which has been figured in 37 plates. The 

 second volume has now appeared in the year 1844, con- 

 taining the Brachiopoda, Testacea, and Tunicata; conse- 

 quently the second great division of the Mollusca. To this 

 volume belong 33 lithographic plates. The text, for the 

 most part, affords only the name of the species with the 

 synonomy and habitat. Some new species are described, 

 and of these, as the work, perhaps, has not an extensive cir- 

 culation, the diagnoses are given below. 



In the Uebersicht cler Arbeiten und Veranderungen der 

 Schlesischen Gesellschaft, fiir vaterlaiidische Kultur, im 

 Jahre 1844, supplements to the Molluscous Fauna of Silesia 

 are given, by H. Scholtz. In these some species, and also 

 the genus Pupula, Ag., are added to the Silesian Fauna. 

 In an appendix is given an alphabetical list of the genera 

 and species indigenous in Silesia, together with an account 

 of their distribution according to the different conditions of 

 altitude. According to this there occur, in the plains, 91 

 species ; in lower declivities, 92 species ; and in the moun- 

 tainous regions, 25 species. Of the 135 species, arranged 

 in 26 genera, 78 in 14 genera are terrestrial, and 57 in 



