^HiTEAVES.] LARAMIE AND CRETACEOUS INVERTEBRATA. 7 



"which have been seat to the author of the species, who confirms the 

 correctness of their identification. 



CoRBicuLA CTTHERiFORMis, Meek & Hajdcn. 



Cyrma (Corbiada ?) cytheriformis, Meek & Hay den. 1860. Proc. Ac. Kat. Sc- 



Phil.,vol. XII., p. 176. 

 CorUcvla a/iheriformis, M. & H. lb., p. 432. 



■Corbicuia cytheriformis, Meek. 1S76. Eep. U.S. Geol. Surv. Terr., vol. IX, &c., 



p. 520, pi. 40. flgs. 5 a, b, c, d, e. 

 " " White. 1880. U.S. Geol. Surv. Terr., Contr. to Pal., Kos. 



2-8, p. 74, pi. 21,figs. 4 a, b,c, d. 

 " ' White. 1883. Rev. Non-Marine Fcss. Moll. X. Am., p. 31. 



pi. 22, figs. 1-6. 



Eye-Gi'ass flat, Old Man Eiver, G. M. Dawson, 1881 and T. C. 

 "Weston, 1883. From the basal beds of the St. Marv E. Series. 



CoRBicuLA occiDENTALis, Meek & Hayden. 



Plate 1, figs. 3 & 3a. 



Cyn na ocod'-nialU, Meek & Hayden. IS.oii. Proc. Ac. Xat. Sc. Phil, vol. VIII. p. 116. 



Corhkvla occidentalis, Meek. 1869. lb., vol. XII, p. 432. 



Corbicuia (Tdoritina), Bannishri, Meek. 1873. Eep. U.S. Geol. Surv. Terr, for 



IS 72, p. 513. 

 Corblcidu occifhniaUs, Meek ^.t Hayden. G.M.Dawson. 1875. Eep. Geol. \ Ees. of 



Eeg. in Vic. of 49th. Par., p. 133- 

 Corbicuia occidrnhiUs, Meek. 1876. Eep. U. S. Geol. Surv. Terr., vol. IX, p. 521, 



pi. 40, flgs. 6a, b,c. 

 Corbicuia ocridi.ntalis, AVhite. (as of M. A- H.) 1880. U.S. Geol. Sur. Terr. Contr. to 



Pal., Xos. 2-S, p. 75, pi. 21, figs. 3 a, b, v. 

 Corbicuia occidentalis, AVhite. (as of jM- & H.) 18S3. Eev. Xon-Marine, Foss. i\Ioll. 



N. Am., p. 31, pi. 17, figs- 6, 7 & pi. 23 figs. 1-6. 



St. Mary Eiver, two miles north of the 49th Parallel, — and four 

 miles west of the St. Mary Eiver; G. M. Dawson, 1874, H. M. North 

 American Boundaiy Commission; St. Mary E. Sei-ios. 



Bow Eiver, mouth of East Arrow-wood Creek, (tojj of section) 

 G. M. Daw,son, 1881 ; Eye-Grass flat, Old Man Eiver, G. M. Dawson, 

 1881 and T. C. Weston, 188.3, very abundant. All St. Mary E. Series. 



UpjDer Belly Eiver, twenty-two and twenty-three railed aliove the 

 mouth of the Waterton, E. G. McConncIl, 1881 ; at both places probably 

 :from the St. Mary E. Series, but in a disturbed region. 



