96 University Geological Survey of Kansas. 



large regularly arranged punctures." The dental lamellae do 

 not extend much beyond the teeth, and are situated close to the 

 sides of the shell, so that the lateral space enclosed is very small. 

 There seems to be a rounded, indistinct ridge extending about 

 two-thirds the distance to the front on* the interior of the ventral 

 valve. Loop situated a little posterior to the middle of the 

 shell, and is about one-third the length of the shell, the two 

 pointing obliquely forward. Measurements of two specimens 

 illustrating the variation: Length, 21 mm., 25 mm. ; width, 

 14 mm., 19 mm. ; convexity, 10 mm., 16 mm. 



Range and distribution : Upper Coal Measures : Kansas City, 

 Eudora, Lawrence, Lecompton, Topeka, Grand Summit. 



SPIRIFERINA. 



d'Orbigny, Paris Acad. Sci., Comptes Rendus, XXV, p. 268, (1847). 

 Hall and Clarke, Pal. N. Y., VIII, pt. II, p. 51, (1893) ; etc. 



Spiriferina cristata. 



Terebratulites cri status Schlotheim, Beit, zur Naturg. der Verst., Akad. 



der Wiss. zu Muenchen, pi. i, f. 3, (1816). 

 Spirifer octoplicata? Hall (non Sowerby), Stansbury's Expl. Gt. Salt 



Lake, p. 409, pi. iv, f. 4, (1852). 

 Spirifer kentuckyensis Shumard, Geol. Surv. Mo., i, p. 293, (1855); etc. 

 Spiriferina cristata Davidson, Quart. Jour. Geol. Soc. London, p. 170, 



pi. ix, f. 6, (1863); etc. 

 Spirifer laminosus Geinitz (non McCov), Carb. u. Dyas in Neb., p. 45, 



pi. in, f. 19, (1866). 

 Spirifer kentuckyensis var. propatulus Swallow, Trans. St. L. Acad. 



Sci., ii, p. 489, (1866). 

 Spiriferina kentuckyensis Meek, Fin. Rep. U. S. Geol. Surv. Neb., p. 



185, pi. vi, f. 3a-d, pi. vin, f. 11a, b, (1872); etc. 

 Spirifer {Spiriferina) kentuckyensis Hall, 2d Rep. N. Y. St. Geol., pi. 



Lxi, ff. 14-16, (1883). 

 Spiriferina cristata Schuchert, Bull. U. S. Geol. Surv. 87, p. 410, (1897). 



Meek's description : " Shell rather small, varying from sub- 

 globose to semicircular, or even subfusiform, always wider than 

 long ; breadth sometimes twice or even three times the length ; 

 hinge line always equaling the greatest breadth of the valves, 

 occasionally greatly extended, and terminating in slender mu- 

 cronate ears ; anterior and lateral margins generally forming 

 a nearly semicircular curve. Ventral valve somewhat more 

 convex than the other, the greatest convexity being between 

 the beak and the middle ; beak moderately prominent and 



