25 



extending into the aperture ; base very convex ; aperture white. 

 Length, ^^ inch, breadth, equal to the length. Hab. Oahu. 



Cyp. unifasciata. Shell oblong-ovate, subrostrate, smooth, 

 glossy, light slate color, with a broad, interrapted band of a dark 

 brown color passing over the middle of the shell ; aperture rather 

 narrow, white, with a fine purple stain at the extremities. Length, 

 nearly 4 inch, breadth, ^ inch. Hab. Oahu. 



CyPRiEA sPADix. Shell elongate-ovate, rostrate, smooth, pol- 

 ished, brown or bay color ; base convex, white ; aperture narrow, 

 yellowish, especially at the extremities. Length, | inch, breadth, 

 ^ inch. Hab. Oahu. 



Mr. Binney stated that Dr. Gould, a few other gentlemen 

 and himself, had engaged Mr. John Bartlett, a person well 

 qualified for the task, to make a zoological exploration of 

 the extreme southern part of the peninsula of Florida, with 

 a view of ascertaining its productions in reference to the 

 geographical distribution of both terrestrial and marine spe- 

 cies. Mr. Bartlett's first remittances had arrived. Mr. 

 Binney had examined the land shells ; they are such as to 

 confirm fully the supposition formerly advanced by him that, 

 in respect of the terrestrial mollusks, the southern district of 

 Florida is distinguished from the other districts of the Uni- 

 ted States, and approximates in zoological character to the 

 Antilles, which it approaches so nearly, geographically. Of 

 seven genera, two, Cyclostoma and Siphonostoma are com- 

 mon to it and the Antilles, and the species of these genera 

 are probably the same that have been already noticed in 

 Cuba. There are several forms of Bulimus and Pupa 

 peculiar to this district, the Antilles, and the more southern 

 coasts of the Gulf of Mexico, and one form of Helix com- 

 mon to it and the island of St. Croix. Of twenty-four 

 species, at least one half are common also to the island of 

 Cuba. Mr. Binney proposed to give a more particular 

 account of these mollusks hereafter. 



Dr. C. T. Jackson made some remarks upon Prof. W. R. 

 Johnson's Report on American coals. He explained the 

 processes employed by Prof. Johnson in his various experi- 



PROCEEDINGS B. S. N. H. 4 JAN. 1845. 



