6 BULLSTINT 2 ( 53 ) 



in being regularl_v striated. It differs from R. ni'ssissippiciius Con. 

 by the regular striations, absence of a smooth band on the superior 

 part of the whorls and in its ver}^ long aperture. 



SCAPHANDER. 



Scapha/idcr pn'iiius AXd. PI. 2, fig's, i, la. 



The specimen illustrated was obtained at Jackson, Miss, and is 

 much larger and finer than the type. 



Scaphander alabanicnsis, nov. sp. PI. 2, fig. 2. 



Shell thin, small, rather broad posteriori}- ; aperture and outer 

 lip slightly produced behind the apex ; spiral sculpture fine, lines 

 very numerous at posterior and anterior, no pitting to lines ob- 

 served ; growth lines only perceptible under a glass ; posterior a- 

 pex with a pit ; margin rising to outer lip ; a very slight callus on 

 bod}' whorl, thicker on concave part curving over the shell. 



Locality. — Gregg's Landing, Ala. 



The species seems to be rare. It resembles the recent ^. ivat- 

 S0711 Dall, but is much broader posteriori}' and the outer lip is not 

 extended much beyond the apex. 



A TVS. 

 Atys ivbusfoidcs, nov. sp. PI. 2, fig's 4, 4a. 



Shell small, oval, subgibbous, striated, umbilicated ; Hues of 

 growth numerous, more so on the posterior half of the shell ; spi- 

 rals numerous, more closely set at extremities and rather deepl}^ 

 cut, no pitting of the lines perceptible ; posterior end rising above 

 apex and parth' covering the posterior pit ; the callus twisting into 

 a saddle shape to join the outer lip ; spirals closely set where the}' 

 run up into the umbilicus ; pillar lip nearly straight. 



Locality. — Gregg's Landing, Ala. 



CVLlCHiXA. 

 Cylichna vieycri, nov. sp. PI. 2, fig. 5. 



Shell cylindrical, narrow, thin, lines of growth prominent and 

 closely set on the posterior, becoming obsolete on the middle pait 

 of the shell ; spiral lines numerous, closely set, impressed slightly 

 and showing very faintly through the lines of growth at the pos- 

 terior end ; a deep excavation running f I'om aperture at posterii. r 

 over the apex and connecting to outer lip which projects abo^^e 

 the opening, a strong rounded ridge marking the connection with 

 the edge of whorl ; aperture narrow at posterior, widening at an- 

 terior, the callus thickening but without a fold, umbilicus rudi- 



