Maryland Geological Survey 285 



conceiitrie stritu-, which are directed gently hackward from tlie feature, 

 and scarcely showing any greater cnrve as they approach the peripheral 

 band; the band is of moderate width, simple, and limited on the two 

 sides b}' a linear carina, within which the simple concentric striae make 

 an abrupt retral "curve ; the concentric striae above and below the band 

 are of similar cliaracter, while the revolving striae are finer on the lower 

 side." Hall, 1879. 



The Maryland specimens are in the form of smooth internal impres- 

 sions which show scarcely any structural markings. In size they agree 

 very well with the specimen represented by iigs. 11 and 13, pi. XX, pt. ii, 

 vol. v, Pal. X. Y., but there is no indication of the sutural band, and 

 apparently the body-whorl is not so closely attached to the baa' of the 

 spire. Hall reported casts of this species in Maryland and [W.] Vir- 

 ginia (loc. cit. p. 77) and gave two views of an internal cast (pi. xx, figs. 

 9 and 10) from C'und)ei'la)id which show, however, somewhat faintly a 

 spiral band on the last volution. Some of the specimens were submitted 

 to Dr. Grabau who wrote as follows : " I should incline to 'P. itys, Init 

 these casts are so unreliable that T would not do more than refer it with a 

 question mark." 



Length, about 20, 28 mm.; width, about 18, 22 7iim. 



Occurrence. — Eomney Formation, Hamilton Member. Western 

 Maryland; Williams Eoad, \ mile east of Queen City Hotel, Cumber- 

 land; on National Eoad northeast of Cumberland ; Eobinson farm 2 miles 

 south of Patterson Depot, W. Va. 



Collection. — Maryland Geological Survey. 



Genus BELLEROPHON Montf 



Subgenus BUCANOPSIS Ulrich 



Bellerophon (Bucanoi'sis) leua Hall 



Plate XXXYT, Figs. l-'A 



Bellerophon leda Hall, 1861, Descriptions of New Species of Fossils, p. 30. 

 Belleroplion leda Hall, 1862, Fifteenth Rep. N. Y. State Cab. Nat. Hist., p. 58. 

 Bellerophon leda Hall, 1875, Twenty-seventh Rep. N. Y. State Mus. Nat. Hist., 

 pi. xiii, fig. 1. 



