GASTEKOPODA OF THE LOWER GREEN MAELS. 37 



fragment of the Tippah County specimen in the Am. Mus. Nat. Hist, no 

 such vertical markings are seen. Among the collections from Haddonfield, 

 New Jersey, in the collections of the Acad. Nat. Sci., Phila., there is an 

 imperfect example of a small individual which I suppose to belong to this 

 species, with shell preserved, and in which the rostrum is seen to be about 

 equal in length to the rest of the shell, including the aperture, and to have 

 been apparently very slightly twisted. 



Formation and locality: In the Lower Marls at Upper Freehold and 

 Walnford, from the sand under the Lower Marls at Backmans pits, near 

 Middleton, and from the clays below the marls at Haddonfield, New Jersey. 



Pyropsis perlata? 

 Plate I, Figs. 8-10. 



Tudicla {Pyropsis) perlata Conrad ? : Jour. Acad. Nat. Sci., Phila., 3d ser., vol. 4, 

 p. 388, PI. XLVi, Fig. 39; Gabb, Synopsis, p. 85; Meek, Check List Cret. 

 and Jur. Foss., p. 33. 



Rapa elevata Gabb, and Pijrula Richardsonii ? Tuomey, Conrad: Am. Jour. 

 Conch., vol. 4, p. 348. 



Pyropsis Richardsonii (Tuomey) Gabb: Proc. Acad. Nat. Sci., Phila., 1876, p. 384. 



Tudicla (Pyrula) trochiformis Tuomey, Gabb: Synopsis, p. 85, foot note. 



Shell, as shown by internal casts of moderate size, broadly turbinate, 

 with a low, almost flat spire, and short rostral beak; volutions about three 

 in number, strongly angular on the upper part, nearly flat on the summit 

 and rapidly increasing in size with increased growth ; sutures very strongly 

 marked, the inner whorls having been embedded in the upper part of the 

 outer ones; aperture comparatively large, ovate, wide and angular above 

 and pointed below. Umbilical cavity of the cast very large, indicating a 

 very strong and thickened columella and short rostral beak; no evidence of 

 spiral ridges or striae is shown on the casts examined. 



I am by no means certain that this form, as seen in the New Jersey 

 beds, is identical with T. perlata, Conrad; the specimens do not furnish posi- 

 tive characters by which the question can be determined. Conrad's shell, 

 as figured, would have left very much such a cast as this one, as far as the 

 casts could be preserved, except, perhaps, in the extension of the rostral 



