TRANSACTIONS OF WAGNER 

 I 146 



TERTIARY FAUNA OF FLORIDA 



radially striated towards the margins ; adductor scars high up, the anterior 

 larger, the pallial line rather wide, somewhat irregular. Lon. 13.25, alt. 7, 

 diam. 4 mm. 



This is the largest and apparently the most common species of Erycina in 

 the later Tertiary of the Carolinas. On occasional specimens a little faint 

 radial striation may be observed under the shelter of the concentric sculpture, 

 but many specimens do not show it, and on none does it appear to cover the 

 surface. From the next species, which has a somewhat similar form, this is 



distinguished by the well-developed lateral lamellae. 



i 



Erycina (Pseudopythina?) americana n. sp. 



PLATE 44, FIGURES 21, 25. 



Miocene of the Calvert Cliffs, Maryland ; Harris. 



Shell large, moderately convex, inequilateral, rounded at both ends, the 

 posterior side shorter; beaks low, surface sculptured only with rather con- 

 spicuous incremental lines ; anterior dorsal margin nearly parallel with the 

 base, posterior dorsal margin arcuate ; hinge-margin narrow, feebly chan- 

 nelled, edentulous, adductor scars small, narrow, high up ; pallial line wide and 

 radially striated. Lon. 16, alt. 10.5, diam. 7 mm. 



A single right valve was collected by Harris. The umbonal angle of the 

 anterior dorsal margin is slightly defective, and it is uncertain whether the 

 species had a subumbonal tooth or not. The shell might perhaps be referred 

 to the subgenus Pseudopythina, but if the lateral laminae are present it would 

 be merely an Erycina with a rather obsolete hinge armature. 



Erycina marylandica Glenn. 

 PLATE 45, FIGURE 19. 



Miocene of Plum Point and three miles south of Fishing Creek ; Maryland 

 Geological Survey. 



This is a small, short species, with a strongly developed hinge. 



Erycina (Pseudopythina) protracta n. sp. 



PLATE 45, FIGURE 22. 



Pliocene of the Waccamaw River, South Carolina, Johnson; and of the 

 Caloosahatchie marls of Florida, Ball. 



Shell small, thin, almost soleniform, inequilateral; surface polished with 

 sculpture only of incremental lines ; beaks inconspicuous ; anterior end longer, 



