96 THE NAUTTLtJB. 



In his " Economic Zoology, an introductory text-book in Zoology 

 with special reference to its applications in Agriculture, Commerce and 

 Medicine," by Herbert Osborn, M. Sc, 1908, the chapter on Mollusca 

 (p. 147-173) is partially illustrated by original figures. Figs. 94 

 and 95, labeled "Common Snail, Patula ahemata" is apparently 

 Polygra profunda ! Except for a very brief allusion to the pearl 

 and pearl-buttoij industry, the only "economic" moUusks mentioned 

 are the oyster and Mya arenayia, although to go no further away than 

 our own coast, commercially the round clam or quahog is much the 

 more important of our clams, and the scallop industry has assumed 

 large proportions. 



Alcadia pusilla intermedia^ n. var. Shell intermediate in size 

 between A. pusilla and A. hollandi, alt. 5.2, diam. 7.7 mm. ; opercu- 

 lum roughened externally much as in A. hollandi, its columellar mar- 

 gin with sharp comb-like costulae. Jamaica, (S. Raymond Roberts.) 



H. A. PiLSBRY. 



BiFiDARiA TUBA INTUSCOSTATA Clapp. Plate VII, figs. 1, 2, 

 3, 4, Broken shells showing internal lamella X 10. o, 6, 7, 8, Ab- 

 normal shells X 10. 9, 10, 11 Typical X 12. 



PUBLICATIONS EECEIVED. 



Description of New Cretaceous and Tertiary Fossils 

 FROM the Santa Ckuz Mountain, California. By Ralph 

 Arnold. (Proc. U. S. Nat. Mus. xxxiv, p. 345, plates 31-37, 

 1908.) Descriptions of the various geological formations with lists 

 of species, followed by descriptions of some thirty-seven new species. 



Descriptions and Figures of some Land and Fresii-"water 

 Shells from Mexico, Believed to be New. By TVm. H. 

 Dall, (Proc. U. S. Nat. Mus. xxxv, p. 177, plates 29-33, 1908.) 

 A new species of Coslocentrum (^C- palmer i Dall and Bartsch) forms 

 the type of a new section Crossostephanus. Three new Streptostylas, 

 one Euglandina and one Lampsilis are described and figured. 

 Anodonta coarctata Anton and Diplodon wehsteri Simpson are also 

 figured. The latter from New Zealand, was described in The Nau- 

 tilus, Vol. xvi, p. 30, 1902. 



