TRANSACTIONS OF WAGNER 

 1028 



TERTIARY FAUNA OF FLORIDA 



Tellina (Scissula) scitula n. sp. 

 Plate 47, Figure 15, 



Oligocene of Santo Domingo and of Bowden, Jamaica. 



Shell small, thin, elongate-ovate, polished, inequilateral ; rounded in front, 

 moderately pointed behind ; beaks low ; surface with fine, regular, rather close 

 striae extending obliquely backward towards the base, with more or less evi- 

 dent microscopic radial striulation ; posterior dorsal areas minutely concen- 

 trically waved ; interior with no thickened rays ; hinge normal, very delicate ; 

 pallial sinus long, high, normal. Lon. 8, alt. 4.2, diam. 1.5 mm. 



From the young of T. iris Say of the same size it is at once distinguishable 

 by the much finer and closer and more oblique striation and the more pointed 

 posterior end. 



Tellina (Scissula) lampra n. sp. 

 Plate 46, Figure 14. 



Oligocene of the Chipola horizon at Alum Bluff, and on the Chipola River, 

 Calhoun County, Florida. 



Shell solid, polished, moderately convex, subequilateral ; anterior part 

 slightly longer, rounded, posterior attenuated, rather bluntly pointed; beaks 

 low, posterior dorsal area with delicate imbricated sculpture; disk with fine, 

 close, sharp striations descending obliquely backward from the anterior dorsal 

 margin towards the base ; hinge normal, delicate ; internal thickened rays in the 

 right valve, the anterior touched by the anterior end of the pallial sinus, which 

 is wholly confluent below. Lon. 8.6, alt. 7.3, diam. 4 mm. 



This recalls T. decora Say, which is more inequilateral and has a blunter 

 and differently shaped posterior end. The oblique sculpture also is differently 

 disposed and more close set. 



This completes the list of species belonging to the various subdivisions of 

 the genus Tellina known from the Oligocene of North America and the West 

 Indies. The Eocene and Oligocene of middle America, judging by material in 

 my possession, will eventually add very largely to this number. Omitting 

 those species of doubtful horizon from Oregon and California which have 

 already been referred to, we may now conveniently consider the Neocene 

 species in one list, not forgetting that some of them which reach the Oligocene 

 have already been referred to. Tellina {Eitrytellina) appressa Gabb, 1881, 

 from the Pliocene of Costa Rica, is unfigured, but is said to resemble T. riifes- 

 cens Chemnitz; T. (Peronidiaf) arctata Conrad, 1843 (not T. arctata Conrad, 

 Wilkes Exped., 1849, from Oregon = A/aro;;;a arctata Dall), from the Upper 

 Miocene of North Carolina; T. abrnpta Conrad (in Meek's Miocene Check- 



