NORTH AMERICAN CONCHOLOGY. 



319 



"IV. WMtteinore. — (From the same.) 



Page. Name. Locality. 



381 Planorbis armigerus. Cambridge. 



381 Cyclas similis. Cambridge. 



381 Physa heterostropha. Cambridge. 



Agassaz and CmOuIcI. — Principles of Zoology, &c. Part I. 

 Comparative Physiology: by Louis Agassiz and Augustus A. 

 Gould. Boston, 1848. 



[The work being general in its character, no descriptions of shells occur. 

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



Tig. i Fig. 



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



47 Loligo illecebrosa. j 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 No. 2, p. 235. 1837.) 



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

 following]: — 



56 Mytilus margaritiferua Lin. 

 t!8 Mya margaritifera Linn. 



Page. 

 70 Pinna rotundaca Linn. ? 

 73 Mytilus . 



Voluta gravis Linn. 

 Cyprsea moneta Linn. 

 Chiton fasciatus Linn. 

 Murex despectus Linn. 

 Solen siliqua Linn. 

 Mytilus edulis Linn. 

 Cardium edule. 

 Helix pomatia. 



Unio . 



Cliama gigas Linn., &c. 



S. 1*. BliBdretSa. — Disease among Shell-fish (Naiades). (From 

 same as last, p. 97.) 



