702 



LAMELLIBRANCHIA TA. 



[SOI,.— WHI. 



Fig. 1260— Technophorus di- 

 varicatus. Left valve nat- 

 ural size and magnified 3 

 diameters. 



17th Rep. Geo. Sur. Ind., p. 91, Up. 

 Coal Meas. 

 harlanensis, Herrick, 1888, Bull. Denison 



Univ., vol. 



4, p. 117, 

 Berea Grit. 



newarkensis, 



5. palaon- 

 eiliformis, 

 Herrick, 

 1888, Bull. 

 Denison 

 Univ., vol. 

 3, pp. 64, 96, 

 and S. pro- 

 1 o n g a t u s, 

 vol. 4, p. 36, 

 W a v e r 1 y 

 Gr., and S. 

 spellmani, 



and 8. subcircularis, 1887, vol. 2, pp. 36, 

 41, 42, Coal Meas. 

 wheeleri, Swallow, 1862, (Cypricardia (?) 

 wheeleri,) is in Trans. St. Louis Acad. 

 Sci., vol. 2, p. 96. 



Solenomya cuyahogensis, Her- 

 rick, 1888, Bull. Denison 

 Univ., vol. 4, p. 115, Waverly 

 Gr., and 8. meekana, and S. 

 subradiata, 1887, vol. 2, p. 

 30, Coal Meas. 



Spathella subelliptica, Whit- 

 eaves, 1892, Cont. to Can. 

 Pal., p. 298, Devonian. 



Stkeblopteria gracilis, S. media, 

 S. squamosa, Herrick, 1888, 

 Bull. Denison Univ., vol. 3, 

 pp. 56, 57, Waverly Gr. 



Technophorus extenuatus, Ulricb, 1892, 

 19th Rep. Geo. Sur. Minn. p. 222, 

 Trenton Gr., and T. divaricatus, T. fil- 

 istriatus, T. subacutus, Am. Geo., vol. 

 10, pp. 101 and 102, Trenton Gr. 



Tellinomya diminuens, and T. cuneata, 

 Simpson, 1889, Trans. Am. Phil. Soc, 

 p. 453, Clinton Gr. 

 compressa T. nitida, T. planodorsata, 

 T. subrotunda, Ulrich, 181)2, 19th Rep. 

 Geo. Sur. Minn., pp. 215 to 219, Trenton 

 Gr. ; T. intermedia, p. 218, Galena Gr. ; 

 and T. recurva and T. similis, pp. 220, 

 221, Hud. Riv. Gr. ; and T. longa, Am. 

 Geo., vol. 10, p. 103, Black Riv. Gr. 

 candens, lepida, Sardeson, 1892, Bull. 

 Minn., Acad. Nat. Sci., vol. 3, p. 339, 

 Trenton Gr. 



Whitella, Ulrich. 1891, Am. Geo., vol. 6, p. 

 176. [Ety. proper name.] Shell large, 

 thin, obliquely quadrangular or suboval, 

 equivalve, inequilateral, more or less 

 ventricose, closed all around ; beaks 

 prominent, incurved ; cardinal line 

 straight or slightly convex, the edges 

 inflected to form a sharply defined es- 



cutcheon extending beyond the beaks 

 nearly to the anterior extremity of the 

 shell ; area finely striated longitudin- 

 ally ; hinge-line straight, one-half or 

 two-thirds the length of the shell, with 

 four or five oblique teeth in front of the 

 beaks; ligament probably external and 



, internal ; two simple adductor impres- 

 sions, posterior one faint, pallial-line 

 entire ; surface concentrically lined. 

 Type W. obliquata, described at the 

 same place from the Hud. Riv. Gr. ; 

 and W. compressa and W. scofieldi, 

 from the Trenton Gr. 



concentrica, Ulrich, 1892, 19th Rep. Geo. 

 Sur. Minn., p. 247, Trenton Gr. ; W. 

 pmcipta, p. 246, Galena Gr. ; and W. 

 sulcodorsata, p. 248, Hud. Riv. Gr. 



hindi, Billings, 1862, (Cyrtodonta hindi,) 

 Pal. Foss., vol. 1, p. 151, Hud. Riv. Gr. 



sterlingensis, Meek & Worthen, L866, 

 (Dolabra sterlingensis,) Proc. Acad. 

 Nat. Sci., i>. 260, and Geo. Sur. 111., 

 vol. 2, p. 839, Hud. Riv. (Jr. 



Fig. 1261.— Whitella obliquata. a, Left side of a 

 cast; b, and c anterior and cardinal views of 

 a cast; d, left side of another cast; e, hinge 

 and part of the muscular impressions. 



