NO. 1312. SYNOPSIS OF THE VENERIDJE-DALL. 369 



TIVELA (EUTIVELA) PERPLEXA Stearns. 1891. 



Argentine coast; and oti" the Rio La Plata, in 10 to 15 fathoms 

 muddy bottom. 



Notable for its crenulated margins and yellowish-white coloration. 



TIVELA (EUTIVELA) IHERINGI Ball, 1891. 



Sao Paulo and Santa Caterina, Brazil, Ihering. 



More delicate and arcuate than the last species, and mottled or 

 banded* with purplish brown on a paler ground color, the interior 

 more or less purple. 



GAFRARIUM (GOULDIA) CERINA C. B. Adams, 1845. 



Cape Hatteras. North Carolina, and southward to Bermuda, the 

 Antilles, and to 90 miles southwest of Cape San Roque, Brazil, from 

 low water to 95 fathoms. 



This was first described as Thetis cerina by Professor Adams. 



GAFRARIUM (GOULDIA) BERMUDENSIS E. A. Smith, 1885. 



Bermuda, Barbados, and Cura^'ao in 5 to lOO fathoms. 



More convex, heavy, and more coarsely sculptured than G. cerina 

 as a rule, but sometimes varying toward that species, which is also 

 found in Bernmda. 



GAFRARIUM (GOULDIA) INSULARIS Dall and Simpson, 1901. 



Porto Rico, in 5 to 30 fathoms; also in the Oligocene of Bowden, 

 Jamaica. 



Smaller, more inequilateral, and destitute of the lively color paint- 

 ing charactei'istic of the two species above mentioned. G. insularis is 

 of a grayish-white color. 



MACROCALLISTA NIMBOSA Solander, 1786. 



Beaufort, Nortii Carolina, south to Cuba and west to Mobile on the 

 Gulf coast. 



This is Venus gigantea of Gmelin, 1792 (after Chemnitz, 1788); 

 Peetunc^ihis irimho.sus "Humphrey,'' 1797; Papliia ala-avis Bolten, 

 1798; thjtherea riinltiradidta Menke, 1830; and Callistd {2Iacrocalli.st(() 

 gigantea Meek, 1876. 



This is the most showy of American Venerida?, and the largest of 

 its genus. 



MACROCALLISTA (CHIONELLA) MACULATA Linnaeus, 1758. 



Cape Hatteras, North Carolina, and southward to the shores of the 

 Gulf of Mexico, the Florida Keys, through the Antilles, and to the 

 vicinity of Cape San Roque, Brazil. 



It is the Cardimn trigoniun of Martyn, according to Araugo. 



