Raph. 



852 



Kapliistoma 



? from the Hudson river formation^ 



Hill, Perry Co., Fa., among Olaypole's collections, six speci- 

 mens, marked S. 226. — /// h, 



Rastrites barrandi. A graptolite of the Hudson river 



, shale formation, which may 



^^^^■^^UUjj jjjjjnnnnniiJJJJ JJJJ^ be a form of gracilis. Hall, 



''^^ - Pal. N.Y.,Vol. 3,1859,page 



522, figs. 1,2. nil 





Hsllj!!. R.t- 



Reccptaculites circularis. Emmons, Amer. Geol. I, ii, 



mb 



Fig. 62. 



1855, page 230 woodcut 82 ; 

 Em A.G. ms. ^^^j.^j like a thick flattened 



ring, studded with circiilar 

 cells,arranged in lines across 

 it obliquely. Hudson river 

 formation. III 5. 



Receptaculites iowensis. {Selenoides iowensis)^ Owen, 



Geology of Wisconsin, Iowa and Min- 

 nesota, 1852, plate 2 B, fig. 13 (asso- 

 ciated with plate 2. figs. 8, 9) from 

 Turkey river, Iowa. II c^ III a. 



fA. I. 



Receptaculites infundibuliformis, Hall. Pal. N. Y. Vol. 

 6, 1887, page 289, plate 24, fig. 10 (selected from figs 3 to 10), 

 a large specimen of this sponge, which has been macerated, 

 compressed, and a large part of the substance removed. (On 

 the same plate are figures of the somewhat similar sponges 

 Isohadites squamifer^ and hursiformis.) They ought all to be 

 found in the Pennsylvania outcrops, as they are found at 

 Clarksville, N. Y. in Lower Helderlerg limestone,, YL 



