J18 NEW YORK STATE MUSEUM 



PLATE 4 



Estheria membranacea Pacht 

 p. 103 



FIG. 



1-4 Views of the valves showing exterior and interior and 

 living the outline, contour and surface characters of the 

 species. All x4 except fig. 3 which is a young individual. 

 x8. 

 Oneonta-Catskill sediments. Felter's glen, Albany co., N. Y, 



( Estheria ortoni sp. nov. 



p. 109 

 5 A young shell, highly enlarged; showing the strong um- 

 bonal node and the ramifying elevated lines croissing the 

 concentric ridges. xl6. 

 6, 7 Larger shells with similar characters. x8. 

 8 A mature shell with more numorons concentric ridges and 

 fainter crossrlines. x8. 

 Lower barren coal measures. Carrollton O. 



Rhinocaris (?) bipennis Clarhe 



p. 101 



9 The original sixnimen; showing the low and highly dorsad 



undulating carina of the carapace and the abdominal 

 segments. 

 Sherburne sandstone. Ne^ar Deruyter N. Y. 



Rhinocaris scaphoptera Clarke 

 p. 101 



10 Exterior of the left valve with rostrum and showing me- 



dian lance plate and lateral carina. 

 Ithaca beds, Canasawacta creek, Norwich N. Y. 



11 Dorsal view of a specimen with valves conjoined, rostral 



and median plates in position. x2. 

 Ithaca beds. Butteirmilk falls ravine, 3 miles north of South 

 New Berlin N. Y. 



