BRACHIOPODS. 89 



Spirifer cuspidatiformis Miller, 1839: N. A. Geol. and Pal., p. 372. 

 Syringothyris texta Schuchert, 1^90: 9th Ann. Rep. State Geologist New 

 York, p. 34. 



Like S. carteri, but much heavier, larger and robust. 

 Horizon and localities. Lower Carboniferous, Keokuk 

 limestone: Keokuk (Iowa). 



Cyrtina dalmani? (HALL). 



Cyrtia dalmani Hall, 1857: 10th Rpp. New York State Cab. Nat. Hist., 



p. 64. 

 Cyrtia dalmani Hall, 1859: Pa'. New York, vol. Ill, p. 206, pi. xxiv, 



tigs. a-y. 

 Cyrtina dalmani Meek & Worthen, 1868: Geol. Sur. Illinois, vol. Ill, p. 



383, pi. vii, tig*. 3a-b. 



A small form closely related to C. acutirostris. 

 Horizon and localities. Devonian, Hamilton ? limestone : 

 Bailey landing ( Perry county ). 



Cyrtina acutirostris ( SHUMARD ) 



Plate xxxix, figs. lOa-b. 



Cyrtia acutirostria Shumard, 1855 : Geol. Sur. Missouri, Ann. Rep., p. 

 204, pi. C, figs. 3a-c. 



Shell small ; area very high, nearly an equilateral triangle ; 

 greatest width at the cardinal margin. Beak of dorsal valve 

 very slightly incurved in most specimens, sometimes straight ; 

 deltoid aperture narrow, becoming abruptly dilated near the 

 base ; lateral .edges slightly elevated ; the elevation most prom- 

 inent at the dilated portion ; mesial sinus commencing at the 

 tip of the beak, rather deeply impressed, and destitute of ribs. 

 Ventral valve semi-elliptical, flattened, convex; mesial ridge 

 elevated above the general convexity of the valve, and well 

 defined by a wide concave space on either side. Some speci- 

 mens exhibit a faint longitudinal sinus running the whole length 

 of the mesial fold. Valves with four or five simple, rounded 

 ribs on each side of the mesial fold and sinus, crossed by the 

 undulating subimbricating lines of growth. ( Shumard.) 



Horizon and localities. Lower Carboniferous, Louisiana 

 ( Kinderhook ) limestone : Louisiana, Hannibal. 





