NORTH AMERICAN CONCHOLOGT, 



319 



"W. "Wliittemore. — (From the same.) 



Page. Name. Locality. 



381 Planorbis armigerus. Cambridge. 



381 Cyclas similis. Cambridge. 



381 Physa heterostropha. Cambridge. 



Agassiz and Gould. — Principles of Zoology, &c. Part I. 

 Comparative Physiology: by Louis Agassiz and Augustus A. 

 Gould. Boston, 1848. 



[The work being general in its cbaracter, no descriptions of sbells occur. 

 Among tbe diagrams, however, occur the following]: — 



Fig. I Fig. 



11 Natica heros (nerv. system.) 52 Tebennophorus Carolinien- 

 47 Loligo illecebrosa. \ 58 Natica heros (teeth). [sis. 



Anonymous. — On the Economical Uses of some species of 

 Testacea. (From Silliman's Journal, o. s., vol. xxxii, No. 1, 

 p. 53 Xo. 2, p. 285. 1837.) 



[No descriptions are given, but numerous interesting remarks on the 

 following]: — 



Page. 



5G Mytilua margaritiferua Zi'n. 

 68 Mya margaritifera Linn. 



235 

 239 

 241 

 241 

 247 

 248 

 248 

 248 

 248 

 249 

 249 



Murez 



tritonia Linn. 



? 



Ostrea edulia Linn. 



Bcabra Linn. 

 Mya pictorum Linn. 

 Turbo littoreua Linn. 

 Buccinum lapillus Linn. 

 Pecten maximum Penn. 



opercularis Penn. 



concentricum. 



70 Pinna rotundata Linn. ? 



73 Mytilus . 



250 Voluta gravis Linn. 



250 Cypraea moneta Linn. 



251 Chiton fasciatus Linn. 

 251 Murex despectus Linn. 



251 Solen siliqua Linn. 



252 Mytilus edulis Linn. 

 254 Cardium edule. 



254 Helix pomatia. 



25 f3 Unio . 



256 Chama gigas Linn., &c. 



S. P. Hildreth.— Disease among Shell-fish (Naiades). (From 

 same as last, p. 97.) 



