298 SYSTEMATIC PALEONTOLOGY 



Description. — " Shell transversely ovate-orbicular, with an elevated 

 line or fold on the anterior margin : surface with fine, somewhat elevated, 

 concentric, nearly equal, numerous striaB, forming grooves between them : 

 apex nearly central, acute : cardinal teeth deeply grooved : lateral teeth 

 two; edge within, simjjle. 



" Length seven-tenths, breadth nineteen-twentieths of an inch. 



" In general outline, this species has a resemblance to T. ostracea, Lam. 

 In one specimen the apex is central, and m another it is placed before the 

 .middle." Say, 1824. 



This is one of Finch's collection, purporting to be from Maryland, but 

 some of v.'hich were undoubtedly from Virginia. I am inclined to be- 

 lieve the reference of this species to Maryland probably incorrect, but 

 give it on Finch's uncertain authority. A specimen in the collection of 

 Johns Hopkins University kbeHed "Jones Wharf" is stained like the 

 Yorktown, Va., material, and I think is most likely from there. 



Occurrence. — Cjioptank Foemation (r). Jones Wharf (?). 



Collection. — Johns Hopkins University. 



Subgenus ANGULUS Megerle. 



Tellina (Angulus) declivis Conrad. 



Plate LXXII, Fig. 1-i. 



Tellina declivis Conrad, 1834, Jour. Acad. Nat. Sci. Phila., vol. vii, 1st ser., p. 131. 

 Tellina declivis Conrad, 1840, Fossils of the Medial Tertiary, p. 35, pi. xix, fig. 1. 

 Tellina declivis Conrad, 1863, Proc. Acad. Nat. Sci. Phila., vol. xiv, p. 573. 

 Tellina [Angulus] declivis Meek, 1864, Miocene Check List, Smith. Misc. Coll. (183), 



p. 10. 

 Tellina {Angulus) declivis Dall, 1900, Trans. Wagner Free Inst. Sci., vol. iii, pt. v, 



p. 1029. 



Description. — " Shell somewhat elliptical, with the anterior side short, 

 and the margin obliquely truncated; posterior end regularly rounded; 

 beaks hardly prominent; lateral teeth distinct. 



" It resembles in outline the Amphidesma suhreflexa, nobis ; and might, 

 viewing the exterior only, be mistaken for that shell." Conrad, 1834. 



The posterior dorsal margin of this species is more abruptly or angu- 

 larly declining than in T. producta. The anterior dorsal margin is also 

 less nearly parallel to the base, and hence the beak is more prominently 

 angular. 



