COLUMBELLIDAE 159 



confused. The uppermost denticle of the outer lip in P. a. iontha is 

 definitely larger and more prominent than its fellows. 



Abundant in shallow water among weeds and grasses. 



Egg capsules of Pyreiie albella iontha Ravenel PI. 50, fig. 344 



Pjreiie lnnata29o (Say) PI. 32, fig. 228 



Alt., 6 mm. Shell smooth, polished, light-colored or amber with 

 crescentic markings of chestnut below sutures; sutures shallow, 

 whorls of little convexity; no sculpture save spiral striations at base; 

 other characters typical. 



P. kinata dvclosiana d'Orbigny is a southern form of this spe- 

 cies. It is dark reddish brown or yellowish, with one or more series 

 of sublunate markings on body whorl. 



Common and abundant on weedy bottoms of littoral zone. 



Genus AIVACHIS H. and A. Adams. 1853 

 Anachls arara semiplicata--'! (Stearns) PI. 31, fig. 224 



Alt. to 16 mm. Shell slender, fusiform; greenish or grayish, 

 finely reticulated with chestnut; thin epidermis; about eight low- 

 convex whorls; spire acuminate; 12 ribs on upper part of body whorl, 

 spiral striations over lower portion; traces of ribs on penultimate 

 whorl; sutures distinct; aperture length of body whorl; narrow, 

 short, straight canal; outer lip thickened, thin at extreme edge, 

 denticulate within; columella curved above, no notch, columellar 

 callus polished; operculum small, oval. 



Abundant in shallow water among grasses and weeds. 



Egg capsules of Anachis avara semlplicata (Stearns) PI. 51, fig. 345 



Ova deposited in sheets — 30 to 100 individual capsules. Free 

 margins slightly overlapping and placed in no regular order. Indi- 

 vidual capsules approximately 1.5-2 mm. by .5 mm. in height at 

 the center; slightly oval, slightly elevated and rounded at the top; 

 thin, free, delicately creased margin about each capsule, often slightly 

 overlapping the margin of adjacent capsules. 



Twenty to 50 ova in each capsule, almost all of which seem to 

 reach full development. On upper surface of each capsule at apex, 

 is a rounded, elliptical depression, marking site of future opening for 



'9° Lat, lunatus, crescent-shaped. 



291 Gr., ana, to, up?;*Lat., avarus, greedy; semi, half; plicatus, folded. 



