19 



Exposures: Side of Erie railway, (see Frontispiece, PI. I,) 

 especially in a little ravine leading up to the quarries. 

 Cayuta creek valley, quarries 2 miles north of East 

 Waverly. Quarries on hillside east of Sayre. 



Fossils: Spirifer disjiuictus (87), Pterinea chemu?igensis (67), 

 Pt. reversa (68), Schizodus chemungensis (77), Goniophora che- 

 mungcnsis (81), Palceoneilo bisulcata (82), Microdon bellistriatus 

 (20), Mytilarca chemungensis (73), Stropheodonta cayuta (115), 

 Orthothetes chemungensis ( 1 1 6- 1 1 7 ) , Schizophoria Hog a ( 1 1 1 - 1 1 2 ) , 

 Sc. impressa (52-53), A try pa aspera (101), A. reticularis (54), 

 Spirifer me sacostal is (40), Tropidoleptus carinatus (96), Produc- 

 tella lachrymosa (102-104), Ambocoslia u?nbonata (108-109), Cam- 

 arotcechia contracta (90-91), Pleurotomaria, Loxo?iema, corals, 

 crinoid stems, and many others. 



o 



Explanation of Plate V. 



(Portage Fossils.) 



Fig's. T-9 especially characteristic of the Genesee beds. 



Fig. 



1. Orbiculoidea lodensis. Brachial valve. Common in upper- 



most beds of the Genesee shale. A Brachiopod. 



2. Lingula spatula ta. Genesee and Ithaca Portage beds, east- 



ward.* A Brachiopod. 



3. Schizobolus concentricus. Upper Genesee shale. A Brach- 



iopod. 

 4&5. Amboccelia umbonata. Distorted somewhat; both valves; 

 more common in Ithaca Portage, eastward, and in the 

 Chemung. 



6. Chonetes lepidus. Commoner in Portage beds to the east. 



7. Styliolina Jissurella. A Pteropod. Uppermost Genesee 



beds. 



*By the words "eastward," "east," or "eastern" it is meant that the 

 species is more abundant to the east of a line drawn from about Seneca lake 

 southward. "West," etc., indicate its predominance in that part of the 

 State west of the same meridian. 



