CLASS GASTROPODA 
231 
Atlanta involuta Gray, 1850 
Figures of Molluscous Animals, 4:101. Voyage ... /a Bonite, Atlas, PI. 21, figs. 9-14. 
Atlanta, testa vitrea, discoidea, late carinata, tenuissima, pellucida; 
spira minima, exsertiuscula, conica, postice inflexa; anfractibus senis, 
convexis; apertura ovato-acuta, postice reflexiuscula, antice emarginata; 
peristomate acute, postice interrupto: (Gray.) 
Atlanta with vitreous shell, discoidal, broadly carinate, very thin, 
pellucid; spire very small, slightly projecting, conical inflexed in the rear; 
with six convex whorls. Aperture ovate-acute, somewhat reflexed in the 
rear, emarginate in front; peristome acute, interrupted in the rear. (Trans¬ 
lation.) 
Type locality, Pacific Ocean. 
Range. Pacific Ocean. Pelagic. 
Atlanta depressa Gray, 1850 
Figures of Molluscous Animals, 4:101. Voyage ... la Bonite, Atlas, PI. 20, figs. 31-37. 
Atlanta, testa vitrea, subovato-discoidea, late carinata, tenuissima, pellu¬ 
cida; spira minima, exserta, conica; anfractibus senis, depressiusculis; 
ultimo carinato apertura ovato-subacuta, postice reflexiuscula, antice emar¬ 
ginata; peristomate sinuoso et acuto. (Gray.) 
Atlanta with vitreous shell, subovate-discoidal, broadly carinate, very 
thin, pellucid; very small spire projecting, conical; with six slightly de¬ 
pressed whorls; the last one -carinate; aperture ovate-subacute slightly 
reflexed in the rear, emarginate in front; peristome sinuous and acute. 
(Translation.) 
Type locality, Pacific Ocean. 
Range. Pacific Ocean. Pelagic. 
Atlanta inclinata Gray, 1850 
Figures of Molluscous Animals, 4:101. Voyage ... la Bonite, Atlas, PI. 21, figs. 9-14. 
Atlanta, testa vitrea, discoidea, late carinata, tenuissima, pellucida; 
spira minima exserta, conica, postice inclinata; anfractibus octonis, con- 
vexius culitis, postice coarctatis; ultimo et penultimo Carina conjunctis; 
apertura ovata-acuta, postice reflexuiscula, antice attenuata et profunde 
fissa; peristomate tenui, acuto. (Gray.) 
Atlanta with vitreous shell, discoidal, broadly carinate, very thin, 
pellucid; very small spire projecting conical, inclined to the rear, with 
eight whorls slightly convex, constricted in the rear; with the last and 
next to the last joined by a carina; aperture ovate-acute, reflexed to the 
rear, attenuate in front, and profoundly divided, peristome thin, acute. 
(Translation.) 
[ 529 ] 
