NATURAL SCIENCES OF PHILADELPHIA. 8 19 



Length about 1 inch (when perfect), width of body whorl -6 in. 

 From Crosswicks, N. J. My coll. from Dr. Slack. 



Resembles Solidula bullata nobis, (Tornatella id. Morton), but is a smaller 

 species, the spire is higher, the whorls are more flattened on the sides, and 

 truncated above, and from a cast of the surface, we believe the exterior to be 

 smooth, while on Morton's type, an internal cast, distinct revolving lines are 

 visible. 



A. ovoidea. Elongated ovoid, spire high, number of whorls uncertain, 

 flattened, cariuate (in casts) on their upper edge. Body whorl regularly, but 

 very gently convex. Mouth longer than the diameter of the body whorl ; acu- 

 minate above, rather narrow to beyond the middle, gradually widening and 

 rounded in advance. One large fold on the columella with a broadly rounded 

 one, not prominent, in advance of it. From faint signs on the surface, there 

 can be detected traces of apparently rather broad longitudinal ribs and revolv- 

 ing lines. 



Length of body and preceding whorl 1 in., total length, perhaps, about 1.25 

 in. Width of body whorl, -6 in. Length of mouth, *8 in. 



Found with the preceding and presented to me by my friend Dr. Slack. 



These two species, with most, if not all of the New Jersey specimens here 

 described, are from the second division of the cretaceous, following the New 

 Jersey Geological Reports. It is the same deposit as that at the deep cut of 

 the Delaware and Chesapeake Canal from which Dr. Morton obtained Scaphites 

 hippocrepis and many other species. It seems to be the richest of the three 

 divisions in species. 



The present species can be distinguished from the preceding one by the pro- 

 portionate length of the mouth and narrowness of the body whorl, and the 

 acute upper edge of the whorl. The difference in the columella folds cannot be 

 satisfactorily pointed out without a figure. 



Globiconcha d'Orb. 



G. curt a. Subglobose, spire exsert, but short, nearly equal in height to 

 the length of the mouth. Whorls four (or five ? ), rounded. Body whorl tumid. 

 Mouth acuminate above, broadly rounded below. Surface? (a cast.) 



Length, -73 in. Width of body whorl, -6 in. Length of mouth, # 45. 



A cast from the cretaceous limestone of Comanche Peak, Texas, in my col- 

 lection. Presented by Dr. Moore, the State geologist of that State. 



This may be a short, tumid species of Phasianella, but these two genera 

 approach each other so closely in some of the forms, that it is impossible to 

 decide from a cast. It does not resemble any of the species heretofore des- 

 cribed in this country. P. (Globichoncha) tumida has a high spire. G. elevata 

 is still further removed. It approaches most nearly to G. planata, Roem., but 

 independent of the difference in size, the spire is proportionally much higher, 

 the mouth is narrowed above and is produced, regularly rounded below, 

 without having the oblique truncation upwards shown in Rcemer's figure. 

 The body whorl is equally prominent, but is regularly rounded. 



Natica Adanson. 



N. infracarinata . Gibbous, spire low ; whorls three ; rapidly increas- 

 ing in size, rounded, compressed above, angle of the whorl round, surface of 

 about the same convexity as N. afojssinis. Lower angle of the whorl, at the 

 edge of the umbilicus, usually strongly carinate in the casts, sometimes rather 

 faintly. Umbilicus patulous, perspective ; open probably to the extreme spire. 

 Mouth elongate, rather narrow, broad above, and acuminate at the lower 

 extremity. Surface of the shell in the umbilicus striate transversely to the 

 direction of the whorls, and marked by a small revolving line. Outer surface 

 unknown. 



Height, 1-20. Width of body whorl, 1-25. Length of mouth, 1 in. 



1861.] 



