8 BIBLIOGRAPHY OP 



Le«i.eur. — Description of a new species of Cephalopode of the 

 genus Loligo: by C. A. Lesueur. (From Journal Acad. Nat 

 Sci. of Philadelphia, 0. S., vol. iii, pt. 2, 1824.) 



Lesiicm*. — Description of several new species of Ascidia: by 

 C. A. Lesueur. (From the same, vol. iii, pt. 1, 1823.) 



Coates. — Remarks on the floating apparatus and other peculiari- 

 ties of the genus Janthina: by Reynell Coates, M. D. (In 

 the Journal of the Academy of Natural Sciences of Philadelphia, 

 vol. iv, pt. 2, p. 356-360, 1825.) 



Barnes. — Notes on the Murex corona of Graelin : by D. H. 

 Barnes. (From the Annals of the New York Lyceum of Na- 

 tural History, vol. ii, pp. 291, 292. Read Oct. 8, 182?. Date 

 of title-page of vol. ri, 1828.) 



Green* — Description of Helix Pennsylvanicus : by Jacob Green. 

 (From the Contributions of the Maclurian Lyceum to the Arts 

 and Sciences, vol. i, No. 1, p. 8. Philadelphia: Jan. 1827. 



Green. — Some remarks on the Unios of the United States, with 

 a description of a new species: by Jacob Green, A. M., Prof. 

 Chem. Jeff. Med. Coll. (From the same, vol. i, No. 2, p. 41. 

 July, 1827.) 



[Specific characters, variations, nacre, monstrosities, erosion, pearls, 

 habits of various species, and facts concerning synonymy.] 



Page. Fig. Name. Locality. 



46 iii Unio .SIsopuB Green. Pittsburg. 



[Descriptions and figures of Achatina Stewartii and A. Oahuensis are 

 given in the succeeding article, and in No. 3, by the same author.] 



