Prossek — Hamilton and Chemung Series. 



3. Leptodesnia JSogersi, Hall (?). . (c) 



Rather imperfectly preserved, but more like this than any other 

 fossil figured. 



XX A 2 . In the lower part of the gorge of West brook in New Berlin 

 village are coarse arenaceous shales alternating with those that are somewhat 

 argillaceous. This exposure begins in the brook only a few rods above tin- 

 Eagle hotel and about fifty feet above the railroad level. These upper 

 Hamilton rocks are excellently shown in this gorge of West brook along West 

 street in New Berlin village. Fossils are very abundant in layers, the fol- 

 lowing list giving a good idea of the fauna of this part of the formation : 

 1. Spirifer audaoulus (Con.), Hall (?). 



It is possible that these specimens are all S. granulosus (Con.), 

 Hall. The surface markings are not preserved and they are largely 



internal impressions. 



2. Spirifer granulosus (Con.), Hall. (c) 



3. Spirifer muoronatus, (Con.), Bill. (rr) 



4. Atrypa reticularis (Linne), Dalm. (it) 



5. Tropidoleptus car i nut us (Con.), Hall. (rr) 



6. Nucula J i rata (Con.), Hall. (rr) 



7. Mbdiomorpha niytiloides (Con.), Hall. (rr) 



8. Ambocozlia umbonata (Con.), Hall. (rr) 



9. Chonetes coronata (Con.), Hall. (rr) 



10. Palaxmeilo constricta (Con.), Hall. (r) 



11. Pleurotomaria capillar ia, Con. (rr) 



12. Spirophyton velum (Van.), Hall (?). (rr) 



XX JB 1 . A brook enters the Unadilla river from the west, one and one- 

 fifth miles south of New Berlin village, which affords a good exposure of the 

 rocks just west of the river road. The lowest rocks, which are coarse, are- 

 naceous shales containing an abundance of Hamilton species, form a small 

 fall, above which is a short gorge and second fall. The fauna is as follows : 



1. Spirifer muoronatus (Con.), Bill. (a) 



Typical mucronate forms of this species as in figure l.">, plate .'54, 

 Vol. IV, Palaeontology of New York. 



2. Tropidoleptus carinatus (Con.), Hall. (rr) 



3. Spirifer granulosus (Con.), Hall. (rr) 



Or S. audaculus (Con ), H. Very much weathered external im- 

 pressions. 



