410 Proceedings of ilie Ohio State Academy of Science. 



revolving striae, having a space between them on the periphery 

 and a single finer line below, and one above near the suture; 

 the last volution not ventricose, and marked by a fifth revolving 

 striation, which is a continuation of the suture line; aperture 



a b 



Fig. 32. — Murchisonia vermicula. 



a. — An outline drawing of an individual which has undergone much 



erosion, enlarged four diameters. 



b. — Two whorls of another specimen, enlarged to eight diameters 



in order to show the characteristic markings. 



broadly oval, roimded below ; cohunella imperforate. Shell 



minute. 



"Length, .14 of an inch [Hall, 1883]." 

 Horizon and locality. — Maxville limestone. 



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



CLASS CEPHALOPODA. 



ENDOLOBUS SP£CTABILIS— Me.fc and Worthen, 



1860. Nautilus spectabilis. Meek and Worthen, Proc. Acad. Nat. Sci. 

 Phil., p. 469. 

 Chester limestone : Gravel Creek, Illinois. 



1865. Nautilus (Endolobus) peramplus. Meek and Worthen, Proc. Acad. 



Nat. Sci. Phil., p. 259. 

 Chester group: Randolph County, Illinois. 



1866. Nautilus (Endolobus) spectabilis. Meek and Worthen, Geol. Surv. 



111., Vol. II, p. 308, pi. 25, figs, la, b. 

 Chester group : Randolph County, Illinois. 

 1891. Nautilus (Temnocheilus) spectabilis. Whitfield, Ann. N. Y. Acad. 

 Sci., Vol. V, p. 594, pi. 14, fig. 22. 

 Maxville limestoiie : Near Rushville, Ohio. 

 1894. Nautilus spectabilis. Keyes, Mo, Geol. Surv., Vol. V, p. 222. 

 Kaskaskia limestone : St. Louis County, Missouri. 



