400 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



also for its great height (from beak to veutral edge), as compared with 

 its length, while the shell figured by Sars is broadly roimded, more liLe 

 our typical C. Gouldii, of which I am iucliued to consider it the adult 

 state. ; 



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

 eral of them more than lo"™ broad, but mostly dead, have been fre- 

 quently dredged this season, off Newport, U. I., in 12 to 20 fathoms, and 

 especially at stations 8G5-871, 873, 876, and 877, in G5 to 192 fathoms, 

 south of Martha's Vineyard and Newport. 



Cryptodon ferruginosus ? (Forbes). 



Aj-inttsfcrnifjuiosus G. O. Sars, Moll. Reg. Arct. Norv.,p. 63, itl- 19, iigs. IQa, h. 



Living specimens were taken at station 871, in 115 fathoms. They 

 were thickly incrusted with iron-oxide, w^hich adheres very tenaciously ; 

 beneath this crust the shell is usualh^ much eroded. 



Loripes lens Verrill & Smith. , 



Amer. Journ. Sci., sx, p. 400, Nov., 1880 (iniblislicd Oct.). 



Shell rather thin, moderately convex, well rounded, nearly equilat- 

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

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

 little sunken, so that the ligament scarcely rises to a level with its 

 edges. The ])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 with 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 toward 

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

 marked by thin and 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 ])osterior ventral angle. 

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

 the upper part of the anterior edge, bounding a small anterior dorsal 

 area. Hinge without any distinct teeth. Anterior mu*icular scav elon- 

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

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

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

 specimens, 14"""; breadth or height, 12.5"'"'. 



Dredged in 1879 in many localities off' Cape Cod, in 50 to 100 fathoms; 

 in 1880 common at nearly all the outer stations, in 05 to 192 fathoms 

 (stations Si^o to 877j. Most of the specimens are dead, but fresh. 



Tellimya ferruginoEa (Mout.). 



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



Montacuta fen'uginosa Jt'il'reys, Brit. Couch., ii, p. '210; v, pi. 31, fig. 9. 



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

 fathoms. They were all thickly coated with a brown ferruginous crust, 

 beneath which the shell is usually eroded. 



