QucM'terly Journal of Cmchology. 37 



Note on the habitat of Neritina Tristis (Orbigny). — M. Maz6, 

 in his catalogue of Martinique shells (Journal de Conchyliologie, 

 1874, p. 173), says that the above is a freshwater species. 

 My experience in Jamaica was just the reverse. The only locality 

 where I found it was at a place on the north coast of the island 

 called Rio Bueno (but which is no more a river than Rio Janeii'o). 

 It occurred in immense numbers on the rocks of the open coast, to- 

 gether with Nerita -peleronta and versicolor, Littorina muricata, and 

 other marine species. It would appear that several species of Neritina 

 inhabit both fresh and salt water. I found this to be the case with 

 N. virginea, as I have mentioned in " Journal de Conchyliologie," 

 1872, p. 37. I should be glad to know if there is any difference in 

 size between marine and freshwater specimens of N. tristis. If the 

 same ratio obtains as in iV. virginea, freshwater specimens of N". tristis 

 ought to be about half an inch in diameter, at least. — C P. Gloyne, 

 Cork. 



REVIEW. 

 Catalog der Conchylien-Sammlung von Fr. Paetel Nehst Ueber- 

 sicht des Angewandten systems. Berlin, Verlag von Gebriider 

 Paetel, 1873. 



A good catalogue, at a reasonable price, has long been a desideratum 

 with collectors of shells. This want has been well met by the publi- 

 cation of a classified catalogue of the extensive collection of Dr. 

 Paetel, the title of which we give above. It is a small volume of 

 172 pages, costing in London only 4s. 6d., and contains a carefully 

 classified list of about 13,000 species, named according to the most 

 modern authorities. 



The fij'st twenty-three pages are devoted to a systematic table of 

 orders, families, genera, and sub-genera, with the sjTionyms of most 

 frequent occurrence ; and the rest of the book, except fourteen pages 

 of index, is taken up with the catalogue of species, which are alpha- 

 betically arranged under each genus, and have the sub-genus or 

 section denoted by a figure prefixed to each species and referring to 

 the preceding table. 



We cannot better illustrate the method followed than by bi'iefly 

 describing a single genus. Selecting for this purpose the genus 

 Murex, we find that in the table of genera it is placed at the head of 

 the Gasteropoda, and is divided into ten sub-genera, or (as we prefer 

 to call them) sections, numbered consecutively as follows : — 

 Sub-Genus 1. Murex L. 



2. Hanstellum Klein. 



3. Ehinocantha E. Ad. 



4. Chicoreus Monffort. 



5. PteronotTis Sivain. 



6. Phyllonotus Swain. 



7. Vitularia Swain. 



8. Homalocantha M'Orch. 



9. Ocenebra Leach. 

 10. Mnricidea Swain, 



