394 rroiccdiiuis (if Ihc Ohio Stiilr . Iccniriii v of SclcJicc. 



by fainl cunccnlric undulations of unc;|ual strength, Ijut most 

 strongh- marked o!i the ])osterior end and on the umljonal slope 

 [Whitlield, 1895].'" 



Length 22 mm.; height 11 mm. 



The shell is readih' distinguished from the other species of 

 Allorisiiia hv its ^mailer size and more transversely cylindrical 

 otitline. 



Fig. 1!L — .lllorisina iiiiixz'illensis. 



a. — A view of the right valve of a specimen. 



b. — .\ view of both valves of an individual. (After Whitfield.) 



Ilorirjoii and locality. — Maxville limestone. 

 Upper zone: ISelow Thompson Residence. \\'hite Cottage. 

 Shale-nodular zone: Cut No. 5, Upper end Cut Xo. 6. Mt. 



Perry-Fultonham; Stimmel Residence, Maxville. 

 Lower zone: Cut No. 4, 3ilt. Perry-Fultonham. 

 Undetermined zone: ]\liddle of Cut No. 6, Mt. PeiTy-Fulton- 



ham ; Harper Shaft ( ?), Olive Furnace. 



CYPRICARDELLA OBLONGA— Hall. 



1856. Cypricardclla obloiuja. Hall, Trans, .\lbany Inst., Vol. IV, p. 18. 

 St. Louis limestone: Spergen Hill and Bloomington, Lidiana. 



1882. Microdon (Cy/^ricardella) oblonga. Whitfield, Bull. Am. Mus. 



Nat. Hist., Vol. L p. 65, pi. 7, figs. 30-34. 

 St. Louis group: Spergen Hill and Bloomington, Indiana. 



1883. Cypriairdella oblonga. Hall, Ind. Geol. and Nat. Hist., Pith Rep., 



p. 340, pi. 30, figs. 30-34. 

 St. Louis group: Spergen Hill. Lanesville, and Bloomington, Li- 

 diana. 

 1906. Microdon oblonga. Beede, Lul. Dept. Geo]. Nat. Res., 30th Rep., 

 p. 1330, pi. 23, figs. 30-36. 

 Salem limestone : Spergen Hill and Bloomington, Indiana,. 



