HrDSON RIVER BEDS NEAR ALBANY 587 



Ctenobolbina ciliata Enunons sp. 



8 Internal cast. xlT 



Upper Utica shale, Menands, Albany co. N. Y. 



9 Gutta percha impression of the same 



lepidocoleus jamesi Hall and Whitfield sp. xlO 



10 Trenton beds of Trenton Falls N. Y. 



11 Middle Trenton beds at Port Schuvler, Albanv co. >". Y. 



12 Lower ITtica beds, Mecbanicsyille, Saratoga co. N. Y. 



Turrilepas ( ?) filosns sp. n. 



13 Smaller plate. x3 \ 



14 Enlargement of part of the same. x9 



15 Larger plate. x3 



Lower XTtica shale of MechanicsTille, Saratoga co. IN". Y. 



Pollicipes siluricus sp. n. 



All figures enlarged three times. 



16 Left tergum 



Upper Utica shale of Green Island, Albany co. N. Y. 



17 A smaller and shorter tergnm from the lower Utica shale of 



MechanicsYille, Saratoga co. X. Y. 



18 Carina 



19 Lateral view of larger carina. This yalve has a prominent 



lateral ridge and narrow marginal border 



20 Fragment of a carina with broad and low lateral ridge an^ 



broad marginal border 



21 Farther enlargement of surface of original of fig. 18. xS 



22 Kostrnm 



23 Lateral view of the same. 



Originals of figures lS-23 are from the upper Utica shale of 

 Green Island, Albany co. X. Y. 



24 Upper latus. from a gutta percha impression. Lower Utio* 



shale of Mechanicsyille, Saratoga co. N. Y. 



