940 PROCEEDINGS OF THE NATIONAL MUSEUM. 



ASTARTE SMITHII Dall, 1886. 



Gulf of Mexico, Cuha, Martinique, Barlnido.s, and Campeche Bank, 

 in 54 to 450 fathoms, bottom temperature 53'^ to 65'^ Fahr. 



Shorter, more inflated, paler, and with ri})s of a different shape 

 from those of suhseqxtlatera or (cluteave^H of about the same size. It 

 is siiarply crenate, while the young- of the other species referred to, 

 at an (M|uivalent growth, are usually without crenations. The species 

 was named in the Blake report. 



ASTARTE GLOBULA Dall, 1886. 



Off Fernandina, Florida, in deep water, south to the coast of Cuba, 

 and in the Gulf of Mexico, in 294 to 539 fathoms. One valve, perhaps 

 drifted, in 1,568 fathoms. 



Of the same general type as A. smitltii., but perfectly smooth and 

 attaining" a larger size. The margin is sharply crenate and the color 

 grayish white. It was at first supposed to ]:>e a smooth variety of 

 smithlt, but more material indicates that it is distinct. 



ASTARTE NANA (Jeffreys MS.) Dall, 1886. 



Cape Hatteras, North Carolina, and south to the Florida reefs and 

 Sombrero Island, West Indies, in 6 to 227 fathoms; temperature, 51° 

 Fahr. 



This shell is somewhat larger and flatter than ^1. xniitJii!., with more 

 erect and prominent beaks, and the ribs cover the whole shell; it is 

 crenate onl}^ when perfectly mature; the color varies from light yel- 

 low brown to rose pink. A still more convex and triangular form 

 occurs among the specimens dredged in the Gulf of Mexico, and among 

 the Florida reefs in 25 to 60 fathoms, which was labeled by Jeffre3^s 

 variety trigona. 



ASTARTE LIOGONA Dall, 1903. 



Near the delta of the Mississippi River, in the Gulf of Mexico, at 

 lis fathoms, muddy bottom. 



A single specimen of a small olivaceous species was dredged as above, 

 it differs from all those hitherto known on the coast, by having the 

 beaks and main part of the disk smooth, while near the margin are a 

 few distinct narrow concentric ribs. The inner margin is sharply 

 crenate. 



Section TRIDONTA Hchumacher. 



ASTARTE ARCTICA Gray, 1824. 



Vadso, Norway; the Arctic Atlantic, Davis Strait, and Greenland, 

 in 15 to 60 fathoms. Also near Bering Strait. 



This convex and smooth form is well distinguished from the A. l><>i'e- 

 alh^ and is whollj^ destitute of concentric ri))bing. It is a circumpolar 



