274 REPORT ON ALBATROSS MOLLUSC A DALL. 



than the above-mentioned figure, and is characterized by a suffusion of 

 dull rufous or orange color in the interior and toward the beaks, the 

 tips of which, however, are usually paler. Stiinpson, from a comparison 

 with Say's specimens, named the specimens found by him in Charleston 

 Harbor T. brevifrons, and I have followed him. 



The shell is rare in South Carolina, extends to Florida and Texas, is 

 reported from the West Indies in several localities, and has been erro- 

 neously identified with T. candeana Orbigny. 



Its southward range is now extended by the U. S. Fish Commission 

 to Station 2764, in 11£ fathoms, off the Rio de la Tlata, in south latitude 

 36° 42' and west longitude 56° 23', on a sandy bottom. 



Family SEMELID.E. 



Genus ABRA Leach. 



Abra longicallus Scacchi. 



This well-known abyssal shell was collected at Station 2751, south of 

 St. Kitts, in GS7 fathoms, ooze; Station 2754, east from Tobago, in 880 

 fathoms, ooze; and Station 27G0, 90 miles north from Ceara, Brazil, in 

 1,019 fathoms ; temperatures 37°.9 to 39°.9 F. 



Genus ERVILIA Turton. 

 Ervilia concentrica Gould. 



This species was collected at Station 2758, 90 miles southeast from 

 Cape San Roque, Brazil, in 20 fathoms, shelly bottom. 



Genus SEMELE Schumacher. 



Semele reticulata Giuelin. 



This species was collected at Station 2758 ; at Stations 2765 and 2766, 

 off the Rio de la Plata, in 10.] fathoms, sand ; and at the Abrolhos 

 Islands, off the Brazilian coast, near Porto Allegre. It ranges northward 

 to Virginia and the Bermudas. 



Semele cancellata Orhigny. 



This very characteristic species was collected at Station 2758, which 

 greatly enlarges its known southward range. Its northern limit as far 

 as known is the vicinity of Cape Hatteras i North Carolina. 



Semele nuculoides Conrad. 



Plate xiv, Fig. 5. 



Semele nuculoides Dall, Bull. U. S. Nat. Mus., No. 37, p. 62; No. 371, August, 1889. 

 ? AmpMdeama nuculoides Conrad, Am. Jonrn. Sci., xli, p. 347 ; Miocene Foss., p. 73, 

 PI. 41, Fig. 6. 



Hab.— Stations 2597, 2002, 2607, 2608, 2610, 2611, 2612, 2615, 

 2617, 2619, 2622, and south to the West Indies, in 2 to 124 fathoms, ex- 

 tending north to Cape Hatteras. 



