TRANSACTIONS OF WAGNER 

 I188 



TERTIARY FAUNA OF FLORIDA 



Diplodonta ( Phlyctiderma ) punotulata H. C. Lea. 

 Lucina punctulata H. C. Lea, Trans. Am. Phil. Soc, 2d Ser., ix., p. 240, pi. 34, fig. 18, 1845. 



Miocene of Petersburg, Virginia ; Lea. 



I have not been able to obtain additional specimens of this species, but it 

 undoubtedly belongs here. The punctations are microscopic, and cover the 

 whole surface, unlike the pustules of D. seniiaspera. The species superficially 

 resembles D. piiiicturella, but is larger. The type specimen is still in the 

 collection of the Academy of Natural Sciences, where I have examined it. 



Diplodonta (Phlyctiderma) semiaspera Philippi. 

 Diplodonta semiaspera Phil., Wiegm. Arch., i., p. 225, pi. vii., fig. 2 a-d, 1836. 

 Lucina granulosa C. B. Adams, Proc. Boston Soc. Nat. Hist., ii., p. 9, 1845 ; Contr. Conch., 



p. 24s, 1852. 

 Lucina semireticulata Orb., Voy. Am. Men, p. 585, pi. 84, figs. 7-9, 1846. 

 Diplodonta semiaspera Dall, Bull. 37, U. S. Nat. Mus., p. 52, 1889. 



Pliocene of the Caloosahatchie beds, Florida, Dall ; living in moderate 

 depths of water from Cape Hatteras, North Carolina, south to Rio Janeiro. 



Diplodonta caloosaensis n. sp. 



Pl.\te 44, Figure 16. 



Pliocene of the Caloosahatchie beds, Florida, Dall ; and of the Waccamaw 

 River, South Carolina, Johnson. 



Shell large, moderately inflated, sculptured with somewhat irregularly 

 prominent incremental lines ; beaks low, pointed, inconspicuous ; anterior end 

 shorter, smaller, evenly rounded into the evenly arcuate base ; posterior end 

 squarish, longer, larger, more inflated ; in the young the form is even more 

 inequilateral and sometimes rounded trigonal with the anterior end attenuated ; 

 hinge-line short, with hardly any hinge-plate ; ligamentary groove sharp, but 

 the nymph not prominent; teeth and scars normal. Alt. 25, lat. 27, diam. 17 

 mm. 



This species is larger and less equilateral than D. Leana; specimens of the 

 same size are less inflated. It resembles D. punctata Say, which is a smaller 

 shell, but has not the microscopic surface sculpture. 



Diplodonta soror C. B. Adams. 

 Lucina soror C B. Adams, Contr. Conch., p. 247, 1852. 

 Lucina kiawahensis Holmes, Post-Pl. Fos. S. Car., p. 29, pi. 6, fig. 5, 1858. 



Pleistocene of the Kiahwah (Ashley) River and of Simmons Blufif, Wad- 



