﻿8 Bulletin 18 34 



A 8 . 12 ft. 8 in. Compact calcareous sandstone which is very- 

 hard and breaks with a conchoidal fracture. No fossils. 



A g . 4 in. A four inch layer of compact gray limestone under- 

 lies the Black River limestone. It may be, and probably is, 

 the Birdseye (Lowville) limestone. It contains no fossils or 

 ' ' birdseye ' ' markings. 



A io . 4 ft. 8 in. Black River limestone. Very lumpy and 

 weathers more rapidly than the Trenton. It is difficult to draw 

 the line between the Trenton and the Black Rivet, and the line 

 drawn is a more or less arbitrary one. The Trenton is more 

 crystalline than the Black River and contains a somewhat differ- 

 ent fauna but there is no sharp break between them in this sec- 

 tion. ' No specimens of Colum?iaria alveata were found in this 

 section, but this species occurs in considerable abundance in a 

 quarry a half mile east. 



A ix . 7 ft. 6 in. Trenton limestone. Crystalline and thin 

 bedded. The large, irregular pebbles spoken of by Prof. C. S. 

 Prosser and Vanuxem as sometimes occurring at the base of the 

 Trenton are found here, one pebble was almost a foot in diameter. 

 The fauna is a characteristic Trenton one. 



Canajoharie Section, 'Tt^jfcUH 



On the farm of Mr. William Allen, near the village of Canajo- 

 harie, one- quarter mile west of the West Shore station, is an old 

 quarry in which about 40 feet of the Upper Calciferous is ex- 

 posed. The rock' is very much as at Tribes Hill and Ft. Hunter, 

 but the fossiliferous beds are thicker. These beds are in the 

 lower 20 feet of the section. The following species were found : 



Lingula ovata cr. Holopea sp. r. 



Dalmanella zvemplei cr. Bathyurus (?) ellipticus r. 



Plenrotomaria hunterensis r. B. levis cr. 

 Ecculiomphalus multiseptarius r. Harrisia parabola cr. 



Ophileta levata a. Asaphus ca?ialis (?) cr. 



Bellerophon calcifer r. Ribeiria niicnlitiformis c. 



Raphistoma obtusa c. R. nuculi. var. equilatera r. 



Murchisonia sp. r. R. turgida a. 

 - ' Cyrtoceras gracilis r. 



