70 . THE NAUTILUS. 



Habitat from Great Egg Harbor, X. J., to Nova Scotia. Com- 

 mon on the shores of Long Island, Nantucket, Martha's Vineyard 

 and Cape Cod. Abundant in Massachusetts Bay. It should be 

 found on the ocean shores of Rhode Island from Watch Hill to 

 Newport, and also on Block Island. 



184. — Astarte qnadrans, Gould. 



Shell small, nearl}' triangular ; basal edge sharp and rounded ; 

 anterior more oblique and longer than the posterior ; beaks central, 

 pointed and eroded ; surface smooth ; epidermis light yellowish- 

 olive ; interior bluish-white, glossy ; margin not crenulated. Length 

 /o ; height ^V ; breadth tV inch. 



Described by Dr. A. A. Gould in the Invertebrata of Mass., p. 81, 

 1841, from specimens obtained from the stomachs of fishes caught in 

 Massachusetts Bay. It is a rare shell but has been quoted from 

 Stonington, Connecticut, to the Gulf of St. Lawrence. 



185. — Astarte iindata, Gould. 



This name was given provisionally by Gould to a variety of A. 

 sulcata, described in his first edition of the Invert, of ^Nlass., p. 80. 

 Binney in the second edition, 1870, p. 119, repeats the same remarks, 

 but all later authors accept the name of undata. 



Astarte sulcata is an European species described in 1778 by 

 Da Costa, British Conch., under the name of Pectunculus sulcatus. 

 Gould, supposing our shell to be identical with the English one, 

 called it by the same name, giving a list of ten or more synonyms, 

 none of which apply to our shell, as it is a distinct species. 



Prof. A. E. Verr'ill in Silliman's Journal for April, 1872, p. 213, 

 remarks as follows: "This is by far the most abundant species on 

 the northern coast of New England. It ranges from Cape Cod to 

 Labrador. In the Bay of Fundy it is very abundant at all depths 

 from three to one hundred and twenty-five fathoms on muddy bot- 

 toms. It varies greatly in form and sculpture, but can easily be 

 recognized in all its varieties by any one familiar with the species 

 of this genus. The beaks are less prominent and the lunule less 

 deeply excavated than in A. sulcata, and other differences exist in 

 the hinge, etc." 



The figure in the second edition of Gould is not characteristic, 

 the drawing having been made from an old eroded specimen of 

 unusual if not abnormal form. 



