320 



Report of the State Geologist. 



Anthozc >a : 



152 Streptelasma rectum. C 



In many places Amboccelia mnhonata occurs in vast numbers especially 

 in tlie beds immediately above the Encrinal limestone. 



1). Coral layer, three inches. 



This bed has been traced for about two miles, and throughout contains 

 the same association of corals and brachiopods. It is the only bed in which 

 the larger cup corals, especially Heliophyllwm Halli are at all abundant, a 

 single specimen only of the latter having been found outside of this bed at 

 Eighteen-Mile creek. This is also, with one exception, the only level at which 

 Atrypa aspera is found in this region. 



A. reticularis is also more abundant, robust, and characteristic than in 

 any other bed. Gystiphylli of various species make up the main portion of 

 the bed. Nearly all the corals lie upon their sides, in some cases two or even 

 three and four lying on top of each other. A large specimen of Heliopliyll um 

 Halli which had fallen over, and grown up again, so as to bend at right angles, 

 had again fallen and lay upon one side. A branch, long since broken off, had 

 grown upwards from the angle. The side on which the coral lay was 

 encrusted with Bryozoa, Aulopora, and a species of Crania. Only three 

 corals were seen standing upright, while as many more were completely 

 inverted. The corals do not show any evidence of wear, the delicate organic 

 incrustations retaining their normal perfection. Wherever the corals are 

 scarce, Atrypa aspera, A. reticularis and other brachiopods are abundant. 

 The first is very common, but a few specimens only show the spines. In this 

 respect the specimens strongly contrast with those found at Moscow, N. Y., 

 where nearly all the specimens retain their spines. 



The following is a list of the fossils obtained from this bed ■ 



Brachiopoda : 



Crania (?). rr 



110 Spirifer audaculus var. Eatoni. rc 



124 Atrypa reticularis, c. 



125 A. aspera. C 



Bryozoa : 



Several species. 



