196 Qiiarterly Jon) nal of ConcJwIogy. 



JP. ttimidus, Morelet. 



Some general considerations follow : the most striking feature of 

 the fauna is the abundance of the genus Faludina, of most varied 

 forms. The genus Pachydrobia and Lacmiopsis are peculiar to this 

 region. Canidia is found, a freshwater Biicciiiimi [see Dr. Brot's 

 paper], a fact not without example in other groups. The genus 

 Pseudodon attains its maximum, and the Unioiiida generally are 

 remarkable. Corhicula is very well represented. 



Brot, a. — Note sur les genres Canidia et Clea^ avec la des- 

 cription de deux especes nouvelles (Note on the genera Canidia 

 and Clea, with descriptions of two new species), pp. 343 — 353. 



These two genera have hitherto been placed among the Me- 

 laniadix, but the examination of the radula proves them to belong 

 to the Buccinidce. The median plate has seven denticulations in 

 Canidia and ten in Clea, the lateral has 3 stout teeth in both 

 genera, the external tooth being extremely large and much curved 

 Eleven species of Canidia and two of Clea are enumerated ; Ca- 

 nidia temncostata (PI. XII, fig. 5), and C. Bocon7ii (fig. 6), both 

 from Siam, being described as new, 



MoRCH, O. A. L. — Revision des Mollusques terrestres des lies 

 Nicobar (Revision of the terrestrial MoUusca of the Nicobars) pp. 

 353—367- 



35 species are enumerated, a mere fragment of what may be 

 expected from the Islands. The following are new: Nanina Roep- 

 stoj'Ji near N. Fraiienfeldi^ N. iopJiarynx near to N. Timorensis, 

 Helix microtrochus, Bulimus (^rather Stenogyra) Roepstorji, Cyclo- 

 pliorus polynema. The author mentions that in almost all the 

 species, two forms, a larger and a smaller, have been met with, 

 and that the larger was found by the old collectors, whilst the 

 smaller occurs now. He attributes this to a diminution in the 



