SECTION B.] NORTH AMERICAN CONCHOLOGY. 



521 



Coiirad. — Monograph of the genus Argonauta, Linnc, with 

 descriptions of five new species : by T. A. Conrad. (From 

 same as last, p. 331.) 



Gould. — List of Shells brought home by the U. S. N". Astro- 

 nomical Expedition : by Aug. A. Gould. (From the United 

 States Astronomical Expedition to the Southern Hemisphere, 

 during the years 1849-52, Lieut. J. M. Gillis, Superintendent. 

 Yol. ii, p. 263. Washington, 1855. Thirty-third Congress, 

 First Session, House of Representatives, Ex. Doc, Xo. 121, 

 4to.) 



[No descriptions are given. — W. G. B.] 



Page. 



263 Chiton aculeatus Linn. 



Coquimbo. 

 263 spiniferus Frembl. 



263 magnificus Desk. 



263 olivaceus Frembl. 



Page. 



263 



263 



263 



263 



Chiton Peruvianus Lam. 



granosus Frembl. 



Cumingii Sowb. 

 Oliva Peruviana Lam. 



Coquimbo. 



