86 BRACHIOPODS. 



Spiriferina kentuckensis (SHUMARD). 



Spirifer octoplicatus Hall, 1852 : Stansbury's Expd. Gt. Salt Lake, p. 409, 



pi. xi, figs. 4a-b (not Sowerby). 

 Spirifer kentuckensis Shumard, 1855 : Geol. Sur. Missouri, Ann. Rep., p. 



203. 

 Spirifer kentuckensis Hall, 1856: Pac. R. R. Reports, vol. Ill, p. 103, pi. 



ii, figs. 10, 11. 

 Spirifer laminosus Geinitz, 1866: Carb. und Dyas in Nebraska, p. 45, tab. 



iii, figs. 19a-d. (Not McCoy.) 

 Spirifer kentuckensis, var. propatulus Swallow, 1866: Trans. St. Louis 



Acad. Sci., vol. II, p. 409. 

 Spiriferina kentuckensis Meek, 1872: U. S. Geol. Sur. Nebraska, p. 185, 



pi. vi, figs. 3a-d, and pi. vii, figs, lla-b. 

 Spiriferina kentuckensis White, 1875 : Expl. and Sur. w. 100 Merid , vol. 



IV, p. 138, pi. x, figs. 4a.-e. 

 Spiriferina kentuckensis Keyes, 1888: Proc. Acad. Nat. Sci., Phila., p. 231. 



Shell small, quite variable, wider than long, with a narrow 

 and deep mesial sinus and fold, on each side of which are 

 from four to ten simple, sharply angular ribs. Ventral ^alve 

 slightly more arched than the other ; beak prominent, curved ; 

 area well defined ; foramen slightly higher than wide. Dorsal 

 valve with inconspicuous beak and narrow hinge area. Surface 

 of valves marked by numerous crowded, strongly imbricated 

 lines of growth. 



Horizon and localities. Upper Carboniferous, Upper Coal 

 Measures : Kansas City, Lexington. 



Syringothyris occidentalis (SWALLOW). 

 Cyrtia occidtntalis Swallow, 1860: Trans. St. Louis Acad. Sci., vol. I, 



p. 648. 

 Cyriina occidentalis Miller, 1877: Cat, Am. Pal. FOBS., p. 110. 



Similar to 8. carteri, but much smaller, and with the cardi- 

 nal extremities more rounded. 



Horizon and localities. Devonian, Callaway limestone: 

 Callaway county. 



Syringothyris extenuata ( HALL). 



Spirifer extenuatus Hall, 1858: Geology Iowa, vol. I, p. 520, pi. vii, fig. 6. 

 Syringothyris halli Winchell, 1863: Proc. Acad. Nat. Sci., Phila., p. 8. 

 Syringothyris extenuata Schuchert, 1890: Ninth Ann. Rep. State Geologist 

 New York, p. 33. 



Closely related to 8. carteri, but smaller, with cardinal ex- 

 tremities more attenuated. 



