1917.] NATURAL SCIENCES OF PHILADELPHIA. 293 



ridge developed just behind the shoulder and in front of the suture, 

 closely appressed to the preceding whorl; suture impressed, crenu- 

 lated by the costals of the preceding whorl ; body abruptly constricted, 

 €ut off from the pillar by a conspicuous spiral sulcus; aperture 

 pyriform, produced anteriorly into a short, sharply recurved canal; 

 outer lip crenulated along the margin in harmony with the spirals; 

 inner lip heavily calloused, excavated medially; columella reinforced, 

 marked by a strong, oblique marginal fold; parietal wash heavy and 

 terminating in a sharp line along its outer margin; umbilical chink 

 shallow and obscure; anterior fasciole well defined, deeply emarginate 

 (Sit its extremity. 



Dimensions. — Altitude 24.4 mm.; maximum diameter 19.4 mm. 



This species is well characterized l)y its low spire and globose 

 outline. It differs from Seminola crassa in that it is much smaller 

 in size, in character of the pillar and in having long axial costse 

 parallel to the axis and persisting from the shoulder to well down on 

 the anterior part of the body. The axial costse of Seminola crassa 

 .are retractive and more deeply impressed, even in young individuals. 

 S. solida has a pillar and marginal columellar fold much the same as 

 Gabb's species of this genus, which was described under the name 

 •of Nassa globosa-'' but that species is much larger, its external ornamen- 

 tation tends to become obsolete on the later whorls. 



Family PURPURID^. 



Genus ECPHORA Conrad. 



Ecphora proquadricostata n. sp. PI. XVIII, fig. 7. 



Description. — Shell small and fragile, umbilicate pyriform, spire 

 depressed; whorls four or five in number and increasing rapidly in 

 size; line of separation between conch and protoconch not sharply 

 marked, two and a half nuclear turns, the initial turn is minute and 

 ■completely submerged in the rounded second whorl which becomes 

 increasingly higher toward its close, the shoulder angle is initiated 

 at the beginning of the third turn and toward the close of this turn 

 this angle develops into a spiral; sculpture spiral, consisting of four 

 regularly spaced and abruptly elevated, narrow spiral ridges on the 

 body whorl and only two on the volutions of the spire; interspiral 

 spaces concave and profound, approximately twice as mde as the 

 spirals, spiral depressions crossed by numerous, faint incremental 

 lines; suture line appressed and following the second spiral; body 



2' Gabb, W. M., 1876, Proc. Acad. Nat. Sci. Phila., p. 282. 



