’ 
400 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
also for its great height (from beak to ventral edge), as compared with 
its length, while the shell figured by Sars is broadly rounded, more like 
our typical C. Gouldii, of which I am inclined to consider it the adult 
state. ; 
Very large and characteristic specimens of the typical C. obesus, sev- 
eral of them more than 15"" broad, but mostly dead, have been fre- 
quently dredged this season, off Newport, R. I., in 12 to 20 fathoms, and 
especially at stations 865-871, 873, 876, and 877, in 65 to 192 fathoms, 
south of Martha’s Vineyard and Newport. 
Cryptodon ferruginosus ? (lorbes). 
Axinus ferruginosus G. O. Sars, Moll. Reg. Arct. Norv., p. 63, pl. 19, figs. 10a, b. 
Living specimens were 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 Verrill & Smith. 
Amer. Journ. Sci., xx, p. 400, Nov., 1880 (published 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 posterior dorsal outline of the shell is nearly straight or 
but slightly convex; the posterior end is very cbtusely 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 posterior ventral angle. 
A slight 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 muscular scar 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, 12.57". 
Dredged in 1879 in many localities off Cape Cod, in 50 to 100 fathoms; 
in 1880 common at nearly all the outer stations, in 65 to 192 fathoms 
(stations 865 to 877). Most of the specimens are dead, but fresh. 
Tellimya ferruginosa (Mont.). 
G. O. Sars, Moll. Reg. Arct. Norv., p. 70, pl. 20, figs. 1 a-c. 
Montacuta ferruginosa Jeftreys, Brit. Conch., ii, p. 210; v, pl. 31, fig. 9. 
Several living specimens from stations 892, 893, and 894, in 365 to 487 
fathoms. They were all thickly coated with a brown ferruginous crust, 
beneath which the shell is usually eroded. 
