PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 341 



100 fathoms, three specimens. Gulf of Mexico, 30 to 805 fathoms, 

 " Blake "exp. (t. Ball). 

 I have comi^ared our shell with specimens sent to me by Mr. Ball. 



Spisula ovalis (Gould). 



Stations 941, 950, oft' Martha's Vineyard, in 09 to 76 fathoms, dead ; 

 also at stations 905, 075, 970, 978, 981 to 983, off the south side of Cape 

 Cod, in 15 to 41 fathoms. 



Cardium {Fulria) jieramahilis Dall. 



Dall, Biilletiu Mus. Coinp. Zool., ix, p. 132, 18S1. 

 Cardium, sp. Verrill, Proc. Nat. Mua., iii, p. 407, 1880. 



Station 871, in 115 fathoms, 1880 ; one valve. Gulf of Mexico 50 to 

 119 fathoms, "Bache" and "Blake'' exp. (t. Ball). 



I have identified our shell by direct comparison with specimens sent 

 to me by Mr. Ball. 



Diplodonta turgida Verrill & Smith. 



A'errill, Amer. Journ. Sci., xxii, p. 303, 1881; Trans. Couu. Acad., v, pi. 58, 

 lig.42. 



Station 950, in G9 fathoms, 1881. 



Cryptodon subovatus? (Jeffr.). V. 



Axinus sniovatus Jeffreys, Proc. Zool. Soc. London, for 1881, p. 704, pi. 61, fig. 8, 



1882. 



A single specimen, from station 891, in 500 fathoms, appears to be 

 this species. It is very thin and delicate, and very inequilateral. 



Montacuta ovata Jeff. 



Jeffreys, Proc. Zool. Soc. London, for 1881, p. 698, pi 61, fig. 4, 1882. 

 Verrill, Trans. Conn. Acad., v, p. 571, July, 1882. 



Off Martha's Vineyard, 100 to 153 fathoms, living. These shells are 

 encrusted with a thick coat of iron oxide. Perhaps the encrusted shells, 

 recorded by me in 1880 as TelUmya ferruginosa, was the same species. 

 The specimens were too much eroded for accurate determination. 



Solemya velum (Say), var. horealis (Totten). 



Off Chesapeake Bay, station 898, in 300 fathoms ; one living specimen. 



Bead shells of S. velum were taken off' Martha's Vineyard, station 871, 

 in 115 fathoms. I regard S. horealis as the adult of 8. velum. 



Leda unca Gould. 



Verrill, these Proc, iii, p. 401, 1880. 



Mr. Ball has identified our shells with those taken in the Gulf of Mex- 

 ico by the Blake exp., in 54 to 640 fathoms. 



He refers them to L. Jamaicensis B'Orbigny. I am not satisfied that 

 this identification is correct, for B'Orbigny's figure is not very like our 

 shells, of which we have taken large numbers. 



Additional localities, in 1881, were stations 921, 949, 951, 1038, in 05 

 to 219 tathoms. 



