TIIK NAUTILUS. 



Hab.: Little Tennessee River, Tenn., Wm. U. Beaucliamp, and' 

 Holston River, Tenn., Mrs. Geo. Andrews. 



Remarks: I obtained three specimens from Wm. U. Beauchamp 

 a number of years ago; afterwards Mrs. Geo. Andrews sent me 

 several of them from Holston river, Tennessee. 



They are near globatas Lea, but were too different to place with 

 that species. In outline they are subti-iangular, not spherical, and 

 rounded like that species. They are more solid and heavy, and a 

 larger species than globatus. They have a lighter colored epider- 

 mis, with closer growth lines, and the surface of the shell is rougher.. 



They need not be confounded with my Andrewsii, as they differ 

 in outline, teeth and character of the rays, and are a very much 

 larger species, and more solid and heavy. 



They vary greatly in character of the rays; some are rayless, two 

 liave obscure maculations, while some have very obscure, indistinct 

 rays. I name this shell after Wm. U. Beauchamp, who first sent 

 me these shells, and who formerly was greatly interested in this 

 family of shells. 



Qnadrula Andrewsce Marsh. PI. I, upper two figs. Nautilu* 

 XV, p. 115. 



PHOLAS TRUNCATA IN SALFM HARBOR. 



BY KDWAUU S. MOUSE. 



Pliolas truncata, first described by Say in the Journal of the 

 Academy of Natural Sciences, in 1822, with distribution indicated 

 as southern, has been reported by others in Connecticut, Vineyard 

 Sound and New Bedford Harbor. It has never to my knowledge 

 been found north of Cape Cod. Lately Mr. J. J. Connor, connected 

 with the Peabody Academy of Science, in digging for Pholas 

 crispata, in Salem Harbor, Mass., found large numbers of another 

 species, which proved to be P. truncata. They were found at ex- 

 treme low-water mark in very hard, fine clay, in company with very 

 small specimens of P. crispata and large specimens of Petricola 

 pholadiformis. Many young of P. truncata were also found. The 

 burrows of this species were very large, in some cases exceeding an 

 inch in diameter. Prof. Verrill states that in Vineyard Sound they 

 are found at all elevations between tides. In Salem harbor they 

 appear only at low tide. 



