Review of Geinitz on the rocks and fossils of Nebraska. 331 
Coal-measures of Iowa), and Pinna peracuta Shumard ; also the 
following Carboniferous types of fishes, viz: Ctenoptychius semi- 
areularis Newberry and Worthen, Cladodus mortifer N. & Wea 
Autliodus and Chomatodus of undetermined species, and another 
form nearly allied to, or identical with Deltodus. We likewise 
7 know from these supposed Permian rocks of Nebraska and Iow 
7 the following genera, believed to be either exclusively Carbonifer- 
} = (948, or not known above the Coal-measures, viz: Fusulina, Hri- 
AY peculiarly Permian type of fishes, has ever been found in 
these rocks, 
But it may be proper to mention more precisely the localities 
and positions at which these Carboniferous types were discovered. 
In the first place we would state that we found Fusulina eylin- 
4 1n vast numbers along with nearly all our Coal-measure 
Species at Rock-bluff in the very beds referred by Prof. Marcou 
tothe Lower Dyas. We likewise found this fossil in great num- 
22 miles west, and less abundantly at Mr. Morton’s place 
ing, associated with the same 
0al-measure species, at the elevation of 75 to 80 feet above low 
Water mark of the Missouri; also at Wyoming, 7 miles north, 
and at Bennett’s mill, 3 miles northwest of Nebraska City, all in 
4 U per Dyas.* Terebratula bovidens, Orthis carbonaria, Retzia punc- 
4 he referred to the latter horizon at Bellevue. The Chomadotus 
@ ‘ad found by Mr. St. John of the Iowa survey, in the so-called 
= ppber Dyas at Bennett’s mill. The same Phillipsia figured by 
| ‘*‘f Geinitz from Plattsmouth, and a tooth of a Cochliodus have 
E) .. © Pusnlina and other catb. foanils also occur in an 18 inch bed of limestone one _ 
__ ile below the outcrop at Nebraska City landing, and at a higher geological horizon. a 
