so 



Palaeontographica Americana 50 



by d'Orbigny for a French fossil (Pal. Frangaise, Terrains Cretaces, vol. 3, p. 209, pi. 

 311, figs. 4-7, 1844). In the Gabb collection from St. Domingo are shells of another 

 species with the general form of this group but ribbing like that of A. areda and A. 

 campsa. 



Area inequilateralis Guppy; Plate XI, Figures 11, 12; (Quart. Journ. Geol. Soc. 

 Lond., vol. 22, p. 293, pi. 18, figs. 2a, 2b, 1866; Schuchert, U. S. Nat. Mus., Bull., no. 

 53. P- 56. 1905), from the Oligocene of Bowden, Jamaica, is referred to the group Scap- 

 harca by Dall, who says, "This species is closely related to A. laiidenlata Dall, * * * 

 but may be distinguished from it at once by the shorter, more delicate, and much more 

 niraierous hinge-teeth of the Jamaica shell. The latter is also thinner and more elegant 

 in sculpture and less inflated. It somewhat resembles the young of A. /lypomela Dall 

 and A. Jioridana." 



Scapharca {Scapharca) actinophora Dall; Plate XI, Figure 13; (Wagner Free Inst. 

 Sci.. Trans., vol. 3, p. 647, pi. 33, fig. 26, 1898), from the Oligocene of Monkey Hill, 

 Panama Railway, is a long shell with beaks in the anterior fourth, about forty entire 

 ribs, arcuate base and narrow, attenuated and rounded posterior end. 



Scapharca {Scapharca) donacia Dall; Plate XI, Figure 14; (Wagner Free Inst. Sci., 

 Trans., vol. 3, p. 649, pi. 33, fig. 13, 1898), from the Oligocene of Bowden, Jamaica, is 

 a small, donaciform shell (6.8 mm. long), with about twenty-four smooth, entire ribs and 

 attenuated posterior end. 



Dall lists A. auriculata Lamarck; Plate XI, Fig. 19; (An. s. Vert., vol. 6, p. 43, 

 1819; Reeve, Conch. Icon., A?ca no. 35, pi. 6, 1844), under the section Scapharca and 

 gives its occurrence as follows: — ?01igocene of Bowden, Jamaica; Pliocene of Limon, 

 Costa Rica; Pleistocene of the Antilles; Recent from Key West to Martinique, in fifteen 

 to forty fathoms. 



A. Deshayesii Hanley; Plate XI, Figures 15, 16, 17, 18; [111. Cat. Biv. Shells, p. 

 157, 1842, (Dall, Moll. Porto Rico, Bull. U. S. Fish Comm. for 1900, vol. 20, pt. i, p. 

 461, 1901); Reeve, Conch. Icon., Area no. 47, pi. 7, 1844] is found recent in the West 

 Indies and has been reported fossil from the mainland of southern North America. Dall 

 lists it recent from Pernambuco, (Wash. Acad. Sci., Proc, vol. 3, p. 141, 1901). It has 

 about twenty-seven narrow, rounded and finely nodulous ribs, the anterior with a me- 

 dian groove; epidermis brown, thick, scaly between the ribs with bristles near the um- 

 bonal ridge. The shell is practically equivalve and is as near Anadara as Scapharca. The 

 young is auriculate behind and has evidently been confused with A. auriculata Lamarck. 

 Dautzenberg, (Mem. Soc. Zool. France, vol. 13, p. 236, 1900), unites the A. hemider- 

 mos Philippi of d'Orbigny, (Hist. Isla Cuba, pt. 2, vol. 5, Moll., p. 345), with Deshayesii. 



Area Websteri VW^xy (Acad. Nat. Sci. Phila., Proc, vol. 62, p. 4S8, 1910), appears 

 to be a Scapharca. It is from the Oligocene of Haiti. There is also an Area sp. undet. 

 from the same place, (1. c, p. 489). 



Section Anadara Gray 



''Gxo\iyo\ A. antiqua L. {Anadara (Gray, 1847) Adams, 1858, in synonymy ,^Anonialocardia 

 Adams, 1858, not of Schumacher, 1817). 



"Shell heavy, trigonal or oblong, inflated, with prosoccelous beaks, with a wide area 



