I'hc l-aiimt (if iJjc MaxvilU' Limestone. 395 



VM). i'yfricardclla oblouija. Grahau and Shinier, N. A. Index Foss., 

 p. 535, fig-. 7-_'8. 

 St. Louis: Indiana. 

 Ste. Genevieve : Kentucky. 



Dcscri/^tioii. — "Shell ()i)l()ng, sul)-(|iia(li"angulai" anterior 

 end, narrow, rotmded ; posterior end broader, flattened, and 

 almost vertically truncate ; cardinal margin nearly straight and 

 hori-zontal behind, declining in front ; base nearly parallel to 

 the hinge-line ; beaks small, somewhat prominent, gibbous below ; 

 posterior umbonal slope gibbous or sub-angular, and extending 



Fig. 'in. — Cypricardclla obloiiga. A view of a right valve, enlarged four 

 times. 



oblitjuely downward and backward to the base of the truncation ; 

 lunule small, ovate, deep in the center; escutcheon linear distinct. 



"Length, .09 to .30; widtli, .06 to .20 of an incli [llall, 

 1883].- 



H()ri::on and locality. — Maxville limestone. 

 Lower zone: Cut No. 4, ATt. Perry-Fultonham. 



CLASS SCAPHOPODA. 



DENTALIUM ILLINOIENSE-^Worthen. 



18S;l llcnialiuui I lliiiniciisc. Worthen, Geol. Surv. III.. Vol. VII, p. 3-25. 



Chester limestone : Chester, Illinois. 

 1S!I(I. Dcutalium iUinoicnsc. Worthen, Geol. Surv. 111., Vol. VIII, p. 

 145, pi. -23, fig. 1. 

 Chester limestone: Chester. Illinois. 

 Description. — "Shell above a medimn size, long, straight, 

 cylindrical, slightly tapering, scarcely inflated at the aperttn^e. 

 Stu-face apparently smooth originally, but slightlv roughened by 

 weathering in the specimen under examination. 



