REPORT OF THE STATE PALEONTOLOGIST I903 257 



cross the radiating ribs. It is usually quite well preserved and was 

 found rarely in the Lower and abundantly in the Upper Oriskany. 



Cypricardinia lamellosa Hall 

 One rather small but quite well preserved specimen from the lower 

 part of the Port Ewen. 



GASTROPODA 



Platyceras cf. gibbosum Hall 

 The specimen from the Lower New Scotland identified pro- 

 visionally with this species agrees with it in shape and size of 

 volutions. It is, however, much less strongly plicate. 



P. lamellosum Hall 

 One specimen from the Upper Oriskany agrees exactly with Hall's 

 figures and description^ in size and shape. It preserves, however, no 

 surface markings. 



P. platystoma Hall 



Two specimens from the Lower Oriskany answer to the descrip- 

 tion of this species.^ They measure 35mm by 40mm and 30mm by 

 35mm respectively ; the first measurement in each case is the diam- 

 eter of the aperture at right angles to the breadth of the shell, the 

 other is the distance in a straight- line from the posterior end of the 

 apex to the anterior side of the aperture. Each has three broad 

 rounded plications on one side, the other being mutilated. 



P. reflexum? Hall 

 Two rather poorly preserved specimens from the Middle and 

 Upper Oriskany are questionably referred to this species. 



P. tenuiliratum Hall 



One well preserved specimen from the Lower New Scotland. 



P. ventricosum Conrad 

 One small specimen, 9mm in greatest length, from the Upper New 

 Scotland and one 30mm in greatest length from the Lower Oriskany. 



Platyceras sp. 



A poorly preserved internal mold from the Coeymans shows three 

 or four prominent plications toward the aperture. There is also evi- 



^Pal. N. Y. 3:330, pl.63. 

 ^'Pal. N. Y. 3:326, pl.6o. 



