32 AMERICAN JOURNAL 



Note on transversely striated muscular fiber among the G-as- 

 teropoda. By W. H. Dall. 



A reply to Mr. DalTs criticism on the Braehiopods as a di- 

 vision of the Annelids. By Edw. S. Morse. 



American Naturalist. Vol. IV, No. 10. Dec. 1870. 



Distribution of the Marine Shells of Florida. By Dr. Wm. 

 Stimpson. 

 Of three hundred and fourteen species collected by the author, 

 only one hundred and forty-five, or less than half, were common 

 to the east and west coasts of Florida ; fifty-eight being peculiar 

 to the east and one hundred and eleven to the west coast. The 

 higher temperature of that portion of the Gulf of Mexico, due 

 to the Gulf Stream, gives a tropic;) 1 character to its molluscous 

 fauna; yet in the north-western portion of the Gulf, where the 

 temperature is lower, the species of the Atlantic coast appear 

 again predominantly, and indicate a connection of the waters of 

 the Gulf with those of the Atlantic through, perhaps, shallow la- 

 goons and sandy straits, within a comparatively recent geolo- 

 gical period. 



II.— FOREIGN. 



BRITISH. 



Report of the 39th Meeting of the British Association fcr the 

 Advancement of Science, Held at Exeter in August, 18G9. 



On the Land and Fresh-water Mullusca of Nicaragua. By 

 Ralph Tate. 



The land shells of Guatemala, Honduras, Yucatan, and Mex- 

 ico resemble those of the West Indian Islands in the prevalence 

 of species of Cylindrella, Macroceramus, Ada?nsiella, Megalo- 

 mastoma, Ohondropoma, Oistula, and Tudor a, none of which 

 genera have been observed in Nicaragua, and south to the Isth- 

 mus of Darien. This circumstance, viewed in connection with 

 the distribution of the Nicaraguan species, points to a different 

 origin for the fauna, and the author is thereby induced to regard 

 Nicaragua as comprised within the Columbian region of the dis- 

 tribution of land and fresh-water shells, and not within the 

 Mexican. 



Conchologia Iconica. Parts 284, 285. 



Philine, "2 plates, Oct. 1870 (with colored plates) 

 P. truncatissima, Sowb., n. sp. Hab. ? 

 P. orientalis, Adams MSS. Hab. ? 



