GIRTY, xY-GTF CARBONIFEROUS FOSSILS 231 



Bembexia lativittata sp. nov. 



Shell small, subglobose, consisting of three or four rather rapidly expand- 

 ing volutions. The largest specimen seen has a diameter of about 5 mm. The 

 height is equal to the greatest diameter or a little greater. The spire is about 

 one third the entire height. The sutures are deeply depressed. The peri- 

 treme section is very nearly circular except for the impressed zone, somewhat 

 flattened above, regularly rounded below. The slit band is very broad, situ- 

 ated on the periphery, defined by thin elevated edges. 



The sculpture consists of fine growth lines which are fasciculated at regular 

 intervals, producing transverse costoe. These are more distinct above the 

 band than below, and near the suture they are apt to be especially strong, 

 forming little elongated nodes. They slope backward gently from the suture 

 to the band and are curved, presenting the convex side toward the aperture. 

 On the band, they are distinct and rather strongly concave, but assume the 

 convex curve below and are nearly transverse. 



Patellostium laevigatum sp. nov. 



Shell rather small, rapidly expanding. At maturity, the growth appears to 

 be rather straight than involved, and the widely expanded lip extends com- 

 pletely around the aperture and is continuous, though with a slight emargina- 

 tion, on the inner side. Umbilicus small. Slit band not elevated above the 

 general curvature, except toward maturity, when it is raised into an angular 

 ridge. 



Surface without radiating strife, it would appear, and with only fine incre- 

 mental lines. These indicate that the aperture has a slight median insinua- 

 tion, with a shallow notch where the band occurs. 



Oxydiscus venatus sp. nov. 



Shell small, sublenticular. Whorl section helmet-shaped. Sides somewhat 

 flattened, strongly rounded inward at the broad (?) umbilicus, regularly con- 

 verging to the periphery, which is keeled, the keel being defined on either side 

 by a slight though distinct groove and bearing a median ridge down its cen- 

 ter. The sculpture consists of costiie which have a transverse direction for 

 one third the distance across the side and then are strongly and abruptly bent 

 backward. This angular change of direction taking place at a corresponding 

 point causes the surface to appear broken into a distinct band about the um- 

 bilicus, an appearance which is enhanced by the fact that after the backward 

 turn, the costfe abruptly become much finer, and some of them bifurcate so 

 that the median portion of each side is more finely and more closely costate 

 than the band near the umbilicus. Over the broad, carinated portion, how- 

 ever, the cost?? again become coarser, stronger and more distant, some of 

 them dying out to allow this transformation to be effected. 



Anomphalus? discus sp. nov. 



Shell rather large, discoidal. Diameter 10 mm. Height 3.5 mm. Spire 

 flattened. Volutions probably 4 or 5' in number, rather rapidly expanding. 

 Peritreme section transversely elliptical with slightly pointed ends ; flattened 



