125 Ohon. 



lections, 1875, at Mansing's quarry, near Ilazardville, Carbon 

 Co., from Lower Held, VI. 



Cheirotherium. See Otozoum parvum. — Trias. Chimx- 

 richnus ingens. E. H. Hitchcock, new species of reptilian 

 footprint found in New Red quarry at Milford, N. J. Boston 

 N. H. S. Dec. 19, 1888. See Appendix. 



Chondrites colletti. See Taonurus coUetti. XV. 



Chonetes acutiradiata. {Strophomena acutiradiata) . 

 Hall, Geology of Fourth District of N. Y., 1843, 

 page 171, fig. 67, 3 ; surface covered with sharp 

 striae, which fork approaching the margin. It 

 o7. 3 ig found in the very high beds of the Cor- 



niferous limestone formation. VIII a. 



Chonetes carinata. (Strophomena carinata.) See Ap- 

 pendix for -figure. — Conrad, Journal ot Academy of Nat. Sci. 

 Phil. 1842, Vol. 8; Hamilton formation. — In Pennsylvania it 

 has been collected by C. E. Hall at Marshall's Falls in Monroe 

 county. — Also abundant in the Hamilton middle sandstone at 

 the south end of Jack's mountain in Huntingdon Co. T, p. 32. 

 Also in Hamilton upper sandstone, T3, p. 111.— In Perry Co. it 

 occurs with Spirorlis, in Ham. Up. shales., at Barnetts mill, 

 spec. 5-137, 138; at Pisgah hill, spec. 59-17.— In Northumber- 

 land Co. at Selinsgrove, spec. 78-4.— Other places in Perry Co. 

 are Crawley hill, spec. 94-2,-7-25 (thirteen specimens ; Rambo's, 

 spec. 107-1 (three).— In Huntingdon Co. at Grafton, spec. 243- 

 5. All the above specimens were got from Hamilton strata. 

 But at Buck hills. Perry Co. spec. 62 is reported as found in 

 Clinton strata., which is probably a mistake. — VIII c. 



Chonetes complanata. See Appendix. — Hall's 10th An. 

 Rt. also Pal. N. Y. Orishany. — In Pennsylvania it has been 

 collected by Dr. Barrett near Port Jervis on the Delaware 

 river from the upper beds of the Stormville shale sub-division 

 of the Lower Helderherg formation, I. C. White's Report on 

 Pike and Monroe counties. — VI. 



Chonetes cornuta. ( Strophomena cormita.) Hall, Geology 

 M,-^^^ of Fourth District, N. Y., 1843, page 72, fig. 17, 3; 



^^^ Clinton formation ; finely and equally striated ; six 



-^^ stiff diverging spines on the hinge line of each valve. 

 Closely resembles Leptcena lata., Von Buch, in Silurian 



