﻿400 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



also for its great lieight (from beak to ventral edge), as compared with 

 its length, while the shell figured by Sars is broadly rounded, more like 

 our typical C. GouldiL of whicli I am inclined to consider it the adult 

 state. 



Very large and characteristic specimens of the typical C. obcsus, sev- 

 eral of them more than 15""' broad, but mostly dead, have been fre- 

 quently dredged this season, off New^port, R. I., in 12 to 20 fathoms, and 

 especially at stations 805-871, 873, 87G, and 877, in 05 to 192 fathoms, 

 south of Martha's Vineyard and Newport. 



Cryptodoa ferruginosus ? (Forbes). 



Axiinisfi'rnifjinosus G. O. Sars, Moll. Reg. Arct. Xorv., p. 63, pi. 19, li^s. 10 a, h. 



Li\ing specimens Avere taken at station 871, in 115 fathoms. They 

 were thickly incrusted with iron-oxide, which adheres very tenaciously ; 

 beneath this crust the shell is usually much eroded. 



Loripes lens Yerrill <fc Smith. , 



Amer. Jouni. Sci., xx, p. 400, Nov., 18S0 (publislied Oct.). 



Shell rather thin, moderately convex, well rounded, ne;;rly equilat- 

 eral; beaks acute, a little prominent, curved forward; lunule snuill, 

 deeply excavated, cordate ; ligamental area long, narrow-lanceolate, a 

 little sunken, so that tlie ligament scarcely rises to a level Avith its 

 edges. The i)Osterior dorsal outline of the shell is nearly straight or 

 but slightly convex ; the posterior end is very obtusely rounded or sub- 

 truncate, making a slight angle with the dorsal edge and a very 

 obtusely rounded one witli the ventral edge, which is evenly curved 

 and continuous with the regularly rounded anterior end; dorsal edge in 

 front of the beaks incurved. Surface rather smooth, especially towar<l 

 the umbos, but with more or less numerous and irregular lines of growth, 

 marked by thin ;ind slightly raised lines, which become more regular 

 and more conspicuous at each end of the shell, and especially poste- 

 riorly. A faint ridge runs from the beak to the posterior ventral angle. 

 A slight undulation or depression (often obsolete) runs from the beak to 

 the ui)per part of the anterior edge, bounding a small anterior dorsal 

 area. Hinge without any distinct teeth. Anterior nni*;cular scav elon- 

 gated, somewhat sinuous ; posterior one small, ovate. Shell usually 

 yellowish white ; young specimens, when living, are translucent, tlesh- 

 color, owing to the animal showing through. Length of the larger 

 specimens, 11'""'; breadth or height, 12.5'""'. 



Dredged in 1870 in many locaUties oil' Cape Cod, in 50 to 100 fathoms; 

 in ISSO common at nearly all the outer stations, in 05 to 192 fathoms 

 (stations 805 to 877). Most of the specimens are dead, but fresh. 



Tellimya fsrruginosa (Mont.). 



G. 0. Sars, Moll. Reg. Arct. Norv., p. 70, pi. 20, figs. 1 a-c. 



Montacuta fcrruginosa Jellreys, Brit. Couch., ii, p. 210; \, pi. ol, lig. 9. 



Several living specimens from stations 892, 893, and 891, in 305 to 487 

 fathoms. They Avere all thickly coated Avith a brown ferruginous crust, 

 beneath which the shell is usually eroded. 



