S6 BULLETIN OF THE LABORATORIES 



II, and above the free-stone proper or in its upper sandy layers. All 

 our specimens being derived from Union Station and Granville. 



Gasteropoda. 



Loxoneina yandellana, 1 1. (?) 



(Plate VIII, Fig. 23.) 



The fragment referred to this species agrees with the figures of the 

 Spergen Hill form quite nearly, except in the presence of a well- 

 marked sutural band, \vhich may after all be due to the state of pres- 

 ervation. It is possible that the portion figured is only the upper part 

 of the spire of a larger species. Most of our specimens do not pre- 

 serve surface markings and can not be safely identified. 



Cyclonema leavenivorthana. Hall. ? 

 (Plate I, Fig. 20) 



This beautiful shell occurs in the upper part of the freestone near 

 Granville, and differs in no respect from those described from the 

 Spergen Hill limestone. From Murchisonia, some species of which 

 it resembles closely, it differs in the absence of a peripheral band, the 

 six volutions being marked only by thread-like revolving striae. Our 

 specimen is perhaps rather more slender than the types. 



Pleurotomaria iCycIoneiJia?) stri^illata, sp- n. 

 (Plate I, Fig. 10, Plate II, Fig. 35.) 



Very similar to Cyclonema lyrata, Hall. Spire moderateiy ele- 

 vated, composed of from two to four whorls, which are distinctly tri- 

 carinate below, but bicarinate above. The whorls increase rapidly, 

 the body whorl being about one-fourth the entire height. The lower 

 whorl is marked by rather distinct crowded incremental lines, which 

 arch sharply backward in passing over the median carina, indicating 

 that the ai)erture was probably notched. The two accessory carinas 

 are nearly as strong as the median one. The whorls are quite convex 



