242 TRANSACTIONS OF THE WAGNER FREE 



Family COLUMBELLID^ (supplementary). 



Genus OOLUMBELLA Lamarck. 

 Subgenus Anachis Adams. 

 CoUumbella (Anachis) styliola n. s. 

 Plate 13, figure 11. 



Miocene marl of the Cape Fear River, at Mrs. Guion's, Johnson. 



Shell slender, acute, of eight or ten whorls ; nucleus large, bulbous, 

 smooth, of two whorls ; subsequent whorls flattened, sloping, with a strong 

 peripheral keel with a wide groove below it, on the anterior edge of which 

 the suture runs, and a narrower groove above it; transverse sculpture of straight, 

 strong, equal riblets with equal interspaces which extend from the suture to 

 the keel, which is made wavy by their ends ; these become more and more 

 numerous as the whorls advance, but near the aperture become obsolete on 

 the middle of the whorl; spiral sculpture of sharp grooves, more evident on 

 the later whorls, one or two near the suture stronger than the others ; on the 

 middle of the whorl the spirals are more or less obsolete, but on the base and 

 pillar of the last whorl they are broad and clear-cut, separating narrower, 

 rounded threads ; aperture narrow, with an obscure varix behind the outer 

 lip at maturity ; canal short, narrow, recurved ; inner lip callous, reflected, its 

 edge prominent, with a row of short lirse running across its inner surface ; 

 body with a thin wash of callus; outer lip sharp-edged, with a few (5-6) short 

 lirse within, a smooth interval next the suture. Max. Ion. of shell 16.5 ; max. 

 diam. 5.0 mm. 



This shell most nearly resembles A. caniax Dall, which has coarser and 

 stronger spiral sculpture, flatter whorls with a less conspicuous, more closely 

 appressed suture and a much smaller nucleus. In A. cainax the earlier 

 whorls are slightly turriculate, being somewhat smaller than the sutural mar- 

 gin in front of them. In A. styliola the peripheral keel is expanded in a roof- 

 like manner over the whorl in front of it in the earlier whorls ; the pillar also 

 is stouter and more swollen than in A. cainax, which also has less conspicu- 

 ous liration in the aperture. 



Family MURICID^F^ (supplementary). 

 Genus MUREX Linn6. 

 Subgenus t Pteropurpura Jousseaume, em. 

 Pteronotus Swainson, Part i. p. 142, 1S90. 



In his British Oligocene and Eocene MoUusca (1891), Mr. R. B. Newton, 

 on the ground of preoccupation, rejects Swainson's name Pteronohts (which, by 

 the way, appeared in 1835 as Pterynotus) and adopts for this group the name 

 of Triplex (Humphrey) Perry. This is an easy if inaccurate way of deciding 

 a question beset with no little difficulty. As a matter of fact Humphrey's 

 name was never illustrated or defined by him. It is like Triplex Perry, really 



