American Journal of Sciences and Arts. '281 



geurs, dans les lies de la Societe, principalement dans celle de Taiti, 

 par J. B. A. Guillemin. 



Decembre. — Notice sur les Plantes cryptogames recemvient de- 

 couvertes en France, contenant anssi Vindication precise des locali- 

 tes de quelques especes les plus rares de la Flore Franfaise, par C. 



MoNTAGNE. DuRiAEi iter Aiisturicum Botanicum, continued. 



Biasolettia et Kladnikia^ deiix nouveaux genres de la famille 



des Omhelliferes, par le Prof. Koch. A translation from the ' Flora.' 



Conspectus Monograpkice Cistacearum, auctore Eduardo 



Spach. Rapport fait a VAcademie des Sciences par MM. de 



MiRBEL;, DuTRocHET, et AuG. DE Saint-Hilaire, rapporteur, 

 sur un Memoire relatifd la structure et au developpement desorganes 

 generateurs d'une espece de Marsilea trouvee par M. Esprit Fabre 

 dans les environs d'Agde. 



American Journal of Sciences and Arts. Conducted by Benjamin 

 SiLLiMAN, M. D., LL.D. Vol. xxxii. No. 1. April 1837. New- 

 haven. London agent, O. Rich. 



The April number of this long established and important Ameri- 

 can periodical has just reached us, commencing the present year. 

 The following is a condensed abstract of its zoological and botanical 

 papers. 



I. Zoology. 



On the (Economical uses of some species of Testacea, p. 53. 



History of the Mytilus Margaritiferus, Linn., My a Margaritifera, 

 Linn., and Pinna rotundata ? Linn. These historical accounts are 

 compiled from various sources, to which references are given. We 

 may remark, however, that the fishing, if such it may be called, of the 

 second species, the " horse muscle," is much more general in the 

 north of Scotland than the author supposes, and the shell much more 

 plentiful, literally paving the bottoms of some of the streams. In 

 many parts they are gathered into large heaps and either rotted, or 

 the pearl immediately extracted. We here allude to what is pro- 

 vincially termed the " Horse Muscle" as mentioned by the author of 

 the paper. We are not so sure that it is the M. Margaritifera of Linn. 



This paper will be continued. Notice of the Shad and Shad 



fisheries of the river Delaware, by Samuel Howell, M. D. Not a 

 scientific, but nevertheless an interesting paper. The shad (no 

 scientific name for the fish is given) enters the Delaware for the 

 purpose of spawning in prodigious numbers about the middle of 

 March, and are fished in various ways, but chiefly by what are cal- 



