166 SYSTEMATIC PALEONTOLOGY 



Length, (of fragment), 32 mm.; width, 9 mm. 



Occurrence. — Kanjemoy Fokmatiox. -J mile below Cliapel Point, 

 Woodstock. 



Collections. — Maryland Geological Survey, Philadelphia Academy of 

 Natural Sciences (No. 6224). 



Family TELLINIDAE. 



Genus TELLINA Deshayes. 



Subgenus ANGELUS Megerle. 



Tellina (Angelus) yiegixiaxa Clark. 



Plate XXXIII, Fig. 3. 



Tellina virginiana Clark, 1895, Johns Hopkins Univ. Circ, voL xv, p. 5. 

 Tellina virgmiana Clark, 1896, Bull. 141, U. S. GeoL Survey, p. 76, pi. xv, tig. 4. 

 Tellina greggi Harris, 1897, Bull. Amer. Pal. No. 9, p. 72. (In part.) 

 Tellina [Angelus) virginiana Dall, 1900, Trans. Wagner Free Inst. Sci., vol. iii, 

 pt. V, pp. 1015, 1016. 



Description. — " Shell elongated, thin, compressed; posteriorly very 

 short, angular, and slightly folded; anteriorly rounded and elongated; 

 umbones posteriorly situated; two small cardinal teeth and indistinct 

 lateral teeth; pallial sinus obscure. Exterior covered with fine concen- 

 tric lines following lines of growth." Clark, 1896. 



This species is more abundant in the Nanjemoy formation, but the 

 specimens from the Aquia formation are much larger. 



Professor Harris has suggested the identity of this form with T. greggi 

 of Alabama, but further study has shown them to be undoubtedly dis- 

 tinct. Dr. Dall agrees with us in this opinion. 



Length, 38 mm. (average, 18 mm.); height, 25 mm. (average, 13 mm.). 



Occurrence. — Nanjemoy Foemation. Woodstock, Popes Creek, East 

 and west of Port Tobacco, Charles Branch between Eosaryville and Up- 

 per Marlboro, 2^ and 3 miles above Popes Creek. Aquia Formation. 

 Aquia Creek, Clifton Beach, 2 miles below Potomac Creek, 1 mile soutli- 

 east of Mason Springs, Fort Washington. 



Collections. — Maryland Geological Survey, Johns Hopkins University. 



