Maryland Geological Survey 171 



Schizophoria striatula Scliuchert, 1897, Bull. U. S. Geol. Surv., No. 87, p. 375. 

 ScMzophoria striatula Grabau and Shimer, 1909, N. Am. Index Fossils, vol. i, 

 p. 2C8, figs. 321d-f. 



Description. — A single specimen of a partly exfoliated ventral valve ( ?) 

 was found, upon which the description is based. Shell considerably wider 

 than long; greatest width near the middle; moderately convex at the 

 sides and flattened toward the umbo: a shallow sinus begins near the beak 

 which broadens and deepens toAvard the front; surface apparently marked 

 by fine, even striae and the texture is conspicuously punctate. 



This specimen was shown Dr. John M. Clarke, who stated that he would 

 call it a ScMzophoria sp., but would not identify it specifically; although 

 on account of the deep siniis it is to be compared with S. impressa Hall. 

 Prof. Schuchert after examining it wrote " I would make it Schiz- 

 oplioria striatula Schl. ( ?)." On account of its similarity to this species, 

 together vnih. the fact that Dt. E. M. Kindle has recently identified it 

 from the Falls of the Ohio and other localities in Indiana, from both 

 the Sellersburg beds and Jefl^ersonville limestone, which are regarded as 

 representing respectively the Hamilton formation and Onondaga lime- 

 stone,* it is refen'ed to this species with a question, although it was found 

 in the lower part of the Roraney formation in Maryland. 



Length, 12 mm. ; width, 16 mm. 



Occurrence. — Romney Formation, Hamilton Member. Ernstville. 



Collection. — Maryland Geological Survey. 



Order TELOTREMATA 



Superfamily RHYNCHONELLACEA 

 Family RHYNCHONELLIDAE 



Genus CAMAROTOECHIA Hall and Clarke 

 Camarotoeciiia congregata (Conrad) 

 Plate XIV, Figs. 15-17 

 Atrypa congregata Conrad, 1841, Fifth An. Rep. N. Y. Geol. Surv., p. 55. 

 Rhynchonella (Stenocisma) congregata Hall, 18G7, Pal. N. Y., vol. iv, p. 341, 



pi. liv, flgs. 44-59. 

 Camarotoechia congregata Hall and Clarke, 1893, Pal. N. Y., vol. viii, pt. ii, 

 p. 192, pi. Ivii, figs. 15-27. 



Mnd. Dept. Geol. and Nat. Resources; 25th An. Kept., 1900 (1901), p. 626. 



