TRANSACTIONS OF WAGNER 

 1036 



TERTIARY FAUNA OF FLORIDA 



Tellina (Scissula) calliglypta n. sp. 



PLATE 47, FIGURE i. 



Pliocene of Shell Creek, Florida ; Willcox. 



Shell small, solid, subtrigonal, moderately convex, nearly equilateral, equi- 

 valve; beaks high, dorsal slopes rapidly descending; anterior end rounded, 

 posterior end slightly decumbent and sharply pointed, basal margin sinuous ; 

 rostrum with a feeble ridge bordering the dorsal area, hardly flexed ; surface 

 polished, with faint incremental lines, obliquely, finely, closely grooved over 

 the entire disk from the anterior end to the borders of the posterior dorsal 

 area, which shows only sharp concentric grooving, most obvious in the right 

 valve ; pallial sinus slightly angular above, not reaching the anterior adductor, 

 wholly confluent below, similar in both valves ; interior with a few radial 

 striae, the ray obsolete. Lon. 13.5, alt. 9, diam. 4.5 mm., some specimens reach- 

 ing a length of 18.5 and a height of 11.5 mm. 



This fine species in combination of form and sculpture is unlike any other 

 recent or fossil known from the region. 



Tellina (Oudardia) Buttoni Dall. 



PLATE 47, FIGURE 18. 



Angulus modestus of California collectors, not of Carpenter. 



Angulus? var. obtusus Carpenter, Suppl. Rep. Brit. Assoc. for 1863, p. 639, 1864. 

 Tellina (Angulus) var. obtusus Carpenter, Proc. Acad. Nat. Sci. Phila., p. 56, 1865. 

 Not Tellina obtusa Sowerby, Min. Conch., ii., p. 175, pi. 179, fig. 4, 1818. 



Pleistocene of San Diego, California, Hemphill and Stearns ; recent from 

 Lituya Bay, Alaska, south to the Gulf of California. 



The specific name of this species being preoccupied in the genus, I propose 

 that above mentioned in honor of Mr. F. L. Button, an enthusiastic student 

 and collector of Pacific coast shells. 



The species is milk white, polished, with faint incremental lines, subequi- 

 valve, and slightly flexed ; the pallial sinus is angular above and behind in 

 the right valve and elongate oval in the left, in both reaching to the anterior 

 ray, which is well defined and strong. Below the sinus is wholly confluent 

 with the pallial line; there are two minor posterior rays in front of the pos- 

 terior adductor. Lon. 20, alt. 12, diam. 3.5 mm. 



The original T. (Angulus) modesta Carpenter is a distinct species, as the 

 type in the National Museum indicates. 



This concludes the list of species belonging to the genus Tellina so far 

 known from the Tertiary of the United States. 



