I38 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I48 



Joe Davis Hollow, 17 miles N. 60° E. of Lost Creek, McCulloch 

 County, Tex. (Cloud loc. TF-392) (4 specimens USNM 142507) ; 

 Chappel, 3,800 feet northeast of Elm Pool, Johnson City area, Blanco 

 County, Tex. (1 specimen USNM 142503). 

 Age. — Early Mississippian (Kinderhook). 



Genus STENOSCISMA Conrad 1839 



Figures 1, 2, 33 



Stenoscisma CONRAD, T. A., 1839, New York Geol. Survey, 3d Ann. Rept, p. 



59. 

 Camerophoria KING, W., 1844, Annals and Mag. Nat. Hist., vol. 14, p. 313 



(nom. nud.) ; KING, W., 1845, Neues Jahrb., p. 254 (nom. nud.) KING, W., 



1846 (Aug.), Annals and Mag. Nat. Hist., vol. 18, p. 89. 

 Camarophoria King, HERRMANNSEN, 1846 (Dec), Indices generum mala- 



cozoorum primordia, p. 161 (emended spelling) ; KING, W., 1850, Permian 



foss. of Eng., Paleont. Soc. Monogr., p. 113. 

 Seminula M'COY, F. (part), 1844, Carb. foss. Ireland, p. 150 {fide BUCKMAN, 



S. S., 1906, Annals and Mag. Nat. Hist, vol. 18, p. 325). 

 Stenocisma Conrad, DALL, W. H, 1877, U.S. Nat. Mus., Bull. No. 8, p. 65 



(altered spelling) ; COOPER, G A., 1942, Wash. Acad. Sci. Journ., vol. 32, 



No. 8, p. 229; SHAW, A. B., 1962, Journ. Paleontology, vol. 36, No. 4, p. 



633. 

 Stenoschisma Conrad, OEHLERT, D. P., 1887, in FISCHER, P., Manuel de 



Conchyliologie, p. 1309 (emended spelling). 

 Stenoscisma Conrad, COOPER, G A., 1944, in Shimer and Shrock, Index foss. 



No. America, p. 315. 

 Camaropholia King, NONAKA, 1944, Jap. Journ. Geol. & Geog., vol. 19, art. 7, 



p. 85, (lapsus pro Camarophoria) . 

 NOT Stenocisma Conrad, HALL, J., 1847, Paleont. New York, vol. 1, p. 142; 



(for Atrypae like Producta modesta Say). 

 NOT Stenocisma CONRAD-HALL, in HALL, J., 1867, Paleont., New York, 



vol. 4, pt. 1, p. 335 (for group containing Rhynchonella formosa Hall). 

 NOT Stenoschisma Conrad, HALL, J. and CLARKE, J. M., 1894, Paleont., 



New York, vol. 8, Brachiopoda, pt. 2, p. 187 (Rhynchonella formosa Hall 



designated as type and only known species). 

 NOT Stenochisma Conrad, GRABAU, A. W. and SHIMER, H. W., 1907, p. 



288 (cites S. jormosum (Hall)) ; KOZLOWSKI, R., 1929, Paleont. Polonica, 



vol. 1, p. 146 (cites 5". formosa (Hall) as type species). 



Shell rhynchonelliform, biconvex; outline bluntly subtrigonal to 

 rhombic, transverse or elongate ; commissure strongly uniplicate, with 

 high, gently costate fold, gently costate flanks, valves overlapping at 

 posterior, butting along lateral and anterior margins, with edges of 

 adults extended to form large, thin, wrinkled stolidium, bearing pallial 

 markings on inner surfaces, normally extending from both valves at 

 crest of fold and flanks, also on sides of fold in some species. Costae 

 low, rounded, simple or less commonly bifurcating, beginning at or 

 slightly posterior to midlength of shell, normally weaker on flanks 



