126 



Citicinfiati Society of Natural History. 



A species of Ldngulepis is found in No. 4 of the foregoing 

 section. Prof. W. says: "The remains are exceedingly 

 fragile, and as the grains of sand in which they are embraced 

 are feebly cemented together, it is nearly impossible to trans- 

 port, or even to handle them without their falling to pieces. 

 These fragments, for no entire specimens were obtained, are 

 arranged promiscuously in the coarse sand, and are all con- 

 fined within three feet of the top of No. 4. They seem to 

 have suffered the attrition and friction incident to coarse sed- 

 imentary transportation. They dispel the idea, which has 

 been suggested, of the possible chemical origin of the St. 

 Peter's sandstone, as an oceanic precipitate." 



This same locality was visited by the writer in 1889, and 

 the following section was observed : 



FT. 



No. 1. Trenton limestone in thin courses, 



No. 2. Layers of coarse-grained, hard sandstone, formed 

 of grains of rounded quartz, of nearly uniform size, with 

 occasional fragments of Linguloid shells, 1 



No. 3. Loose sand, with yellow and brown streaks and 

 greenish spots, 6 



No. 4. Greenish shale and sandstone, mostly shale, . . 5 



The upper portion of this bed is a white sandstone, 

 formed of rounded grains of quartz, cemented by carbonate 

 of lime, and containing fragments of fossils. The inter- 

 stices of the sandstone are filled with fine particles of sand. 

 Below this the shale is a mixture of clay, lime, and sand, 

 the former greerr, the latter white, and formed of rounded 

 quartz grains. The green shale contains what appear to be 

 worm burrows (Planolites), and fragments of Lingulepis 

 morsensis Winchell. 



No. 5. White sandstone of St. Peter's, covered, — 



Total observed • 12 



About half a mile further down the railroad another ex- 

 posure occurs. Here the typical St. Peter's sandstone is well 

 exposed, and it is overlaid by the same succession of shale, 

 loose sand, hard sandstone and limestone, as that in the pre- 

 vious section. In the upper portion of the shale are certain 

 iron-stained layers, in which brachiopods of the genus Orthis 

 are found. These are also seen in the sandstone, together 

 with fragments and impressions of Lingulepis morsensis. 



