22 Palaeontographica Americana 22 



Area Adamsi (Shuttle worth) Smith 

 Plate IV, Figures 16, 17, i8; Plate V, Figure i 



Area ceelata Conrad, Fos. Med. Tert., p. 61, pi. 32, fig. 2, 1845. 



Not Area eeelata Reeve, Concb. Icon., Area no. no, 1844. 



Barbatia (Area) etelata Conrad, Acad. Nat. Sci. Phila., Proc. for 1S62, p. 5S0, 1S63. 



Area laetca of various authors, not of Linu^. 



Area {Aear) Adaiiisii Shuttleworth, JIS.?, Smith, Lin. Soc, Zool., Journ., vol. 20, p. 499, pi. 30, 



figs. 6, 6a, 1890. 

 Area Adaiitsi DaW, Bull. Wus. Comp. Zool. Harvard, vol. 12, p. 243, 1886. 

 Barbatia {Fossularca) Adamsi Dall, Wagner Free Inst. Sci., Trans., vol. 3, pt. 4, p. 629, 1898. 



"Trapezoidal, disk widely and not profoundly contracted; ribs numerous, alternated 

 towards the base, tuberculated, aculeated anteriorly and posteriorly; posterior slope de- 

 pressed; tunbo acutely angulated behind; basal margin slightly arched; posterior margin 

 obliquely truncated ; beaks approximate. 



"Loc. Wilmington, N. C, Mr. Hodge." — Conrad, 1845. 



"This species is well distinguished from the similar looking A. lactea of Europe by 

 the fact that its radial riblets are formed by rows of trailing blisters or hollow flutings, 

 which are very friable and often entirely worn off, leaving the shell practically smooth. 

 Though the shell has long been labelled with Shuttleworth 's name in collections, the first 

 published description I have met with is that of Mr. E. A. Smith, * * * Conrad's spe- 

 cific name is preoccupied. The fossils agree exactly with the living specimens, except 

 that those from the Oligocene are usually somewhat smaller than the full-grow-n recent 

 shells."— Z>a//. 



Ligament occupying only a small, diamond shaped area between the beaks; line of 

 teeth interrupted opposite the ligament. Dall, (Bull. Mus. Comp. Zool. Harvard, vol. 

 12, p, 243, 1886; U. S. Nat. Mus., Proc, vol. 24, p. 508, pi. 31, fig. i, 1902), called a 

 dwarf, short, squarish form with greater proportional diameter the variety Conradiana. 



Dimensions. — Lon. -1-4,-7; alt. -|- 1,-6; semidiam. 3 mm. 



Occurrence. — Oligocene of the Bowden beds, Jamaica, of the Chipola River and Oak 

 Grove, Florida; Miocene of Duplin County, North Carolina; Pliocene marls of the Cal- 

 oosahatchie, Shell Creek, and Alligator Creek, Florida, and the Waccamaw River, South 

 Carolina. Recent, with a range from Cape Hatteras, North Carolina, to the island of 

 Fernando Noronha, on the coast of Brazil, in five to one hundred and sixteen fathoms. — 

 Dall. Oligocene of Bailey's Ferry, Florida; Miocene of Curry and the Natural Well, 

 North Carolina; Pliocene of the Croatan beds, North CaroUna; and recent from Cuba.— 

 C. U. Museum. 



Barbatia {Fossularca?) ovalina Dall; Plate V, Figure 2; (Wagner Free Inst. Sci., 

 Trans., vol. 3, pt. 4, p. 630, pi. 32, fig. 18, 1898), from the Oligocene of Bowden, Jamai- 

 ca, has the form of a Nucula, the cardinal margin of a Limopsis, and the teeth of an Area. 

 Lon. 3.2 mm. 



