74 



Report of the State Geologist. 



JSTucula, with the form of iV! lirata, but with a finely lineate surface; 

 much more oblique than 1ST. corbul/iformis (cc). 

 Modimnorpla concentriea, normal form. 



.)/. concentriea var. nov., an extremely oblique shell, distinct and new. 

 M. concentriea, a form intermediate in outline between the two foregoing. 



Leda b rev irost i • is. 

 Grammy sia mag int. 

 Tentaculites cf. spiculus (c). 



T. sp. long, slender and sharply annulated ; undescribed (c). 

 Above these heavy-bedded mesastrialis-hijera are sandy shales and slabs 

 from which the following species were collected : 

 Actinopteria perstrialis (c). 

 A. Boydi, very small form (c). 

 PalcBoneilo constricta (c). 

 Microdon gregarius (c). 

 Spvrifer mucronatus var. posterus, 

 Leptostrophia perplana (cc). 

 Schizophoria impressa (c). 



Station XII. One mile north of Lisle, Broome county, at the narrows of 

 the Tioughnioga river, seven miles due south of Marathon. Rocks are here 

 exposed in high bluffs on both sides of the river, but are more accessible on 

 the east side along the highway than on the west along the D., L. <fc W. rail- 

 road. On the east an escarpment of 100 to 125 feet has soft, compact, greenish 

 argillaceous sandstones at the base. Overlying is a bank of heavy concretion- 

 ary sandstones, similar to those observed at Station XI, but not less than 300 

 feet higher, showing the repetition of such formations in these upper beds. 

 Fossils are very scarce in these beds, in contrast to their abundance at Station 

 XI. The u tricircled encrinite " (Melocrvnus tricychis), is found throughout 

 in thin layers, and the following additional species were collected: 



Itpfosfrop/i ia in ucronata. 



Spvrifer mucronatus, var. posterus. 



Sp. mexastritdis, small form only, 



. 1 trig pa reticularis. 



Cgrtina I la in iltonenxix. 



Schizodm appressus. 



( 'ladoohonus. 



