TRANSACTIONS OF WAGNER 

 996 



TERTIARY FAUNA OF FLORIDA 



Dorvillea Leach, Moll. Gt. Brit., p. 286, 1852; sole ex. D. anglica Leach, loc. cit.; Jef- 

 freys, Brit. Conch., ii.. p. 444, 1863. 

 Scrobicularia (pars) Jeffreys, Brit. Conch., ii., p. 435, 1863. 

 Lutricidaria Monterosato, Nom. Conch. Med., p. 28, 1884; Erycina ovata Phil., and 



Mactra tenuis Montagu, are cited. 

 Abra Risso, Hist., p. 370, 1826; A. fragilis and siiiuosa Risso, cited; Monterosato, Nom. 



Conch., Med., p. 29, 1884. 

 Syndesmya Fischer, Man., p. 1151, 1887 (S. alba Wood). 

 lacra H. and' A. Adams, Gen. Rec. Moll., ii., p. 409, 1856 ; sole ex. /. scychellarum A. 



Adams. 

 Erycina (sp.) Lam., Ann. du Mus., vi., 1804; Philippi, Moll. Sicil., i., p. 12, 1836. 



Shell tellinoid, with an external ligament and stronger internal resilium ; 

 one or two, often bifid, cardinal teeth in each valve, and feebly developed 

 lateral laminje in the right valve, sometimes obsolete ; surface usually smooth, 

 and with the periostracum often faintly iridescent, as in some Tellinas; pal- 

 lial sinus discrepant in the two valves. The teeth are feeble, often more or 

 less variable in the same species ; in the trigonal species the laterals are fre- 

 quently, but not always, obsolete. There seems to be insufficient ground for 

 more than one sectional division of the genus, as follows : 

 Abra s. s. Type A. tenuis (Mtg.). Exterior smooth or faintly concentrically 



sculptured. 

 lacra Adams. Type A. seychellarum Adams. Surface divaricately sculptured. 

 Strigillina Dunker, Mai. Bl. viii., p. 43, 1861, of which the type is S. lactea 

 Dunker {loc. cit.) is identical with and must be regarded as an exact syno- 

 nym of lacra. Externally this group closely resembles Strigilla. 



Abra nitens Lea. 

 Egeria nitens Lea, Contr. Gaol., p. 51, pi. i, fig. 19, 1833. 

 Mysia nitens Conrad, m Mort. Syn. Org. Rem., App., p. 7, 1834. 

 Amphidesma tellinula Conrad, Am. Journ. Sci., N. S., i., p. 397, pi. 4, fig. 5, 1846; Harris 



Reprint, Fos. Tert., p. 115, pi. 19. fig. 12. 1893. 

 Abra nitens Conrs.A, Am. Journ. Conch., i., p. g, 1865: Checkl. Eoc. Olig. Foss., p. 7, 



1866; Harris, Bull. Pal., i., p. 30. 

 Abra tellinula Conrad, Am. Journ. Conch., i., p. 5, 1865 ; Checkl. Eoc. Olig. Foss., p. 7, 



1866. 

 Tellina nitens Gregorio, Mon. Claib., p. 223 {ex parte), pi. 35, fig. 17, 1890. 

 Syndesmya tellinula Cossmann, Notes Compl., p. 8, pi. i, figs. 7-8, 1894. 



Claiborne sands, at Claiborne, Alabama; Burns and others. 



This little shell is a typical Abra, with which Conrad's Amphidesma tellinula 



