THK NAUTILUS. 91 



Avhorls one and one-half, not enlarged, dextral, translucent, shining, 

 without sculpture. Post-nepionic whorls two, decidedly inflated, 

 with the slit about half way between the suture and the periphery, 

 open only in about one-twelfth of the last turn, marked on the rest 

 as a narrow, moderately deep, depressed groove, which is bounded 

 on each side by a raised thread. The remaining ornamentation of 

 the whorls consists of feeble, raised, equally-spaced, axial riblets, 

 which follow the curve of the outer lip. These riblets are best de- 

 veloped between the suture of the whorls and the slit, becoming en- 

 feebled toward the periphery and quite obsolete on the base. In 

 addition to these, a few ill-defined spiral lirations manifest themselves 

 under high magnification between the suture and the slit. Suture 

 strongly impressed. Periphery of the last whorl well rounded. Base 

 rather depressed and somewhat concave toward the umbilical region, 

 marked by the faint continuation of the axial riblets and many ex- 

 ceedingly tine spiral stria?. Umbilicus narrow, deep, bounded by a 

 \veak basal fascicle. Aperture large, broadly pyriform with continu- 

 ous peritreme, posterior angle obtuse, somewhat patulous anteriorly ; 

 outer lip thin ; columella oblique, thin ; parietal wall distinct, re- 

 flected upon the body whorl, partly closing the umbilicus. 



The type is in the U. S. Nat. Museum collection, No. 171400, and 

 comes from the Gulf of St. George, Patagonia. It measures, long. 

 0.8 mm., diam. 1.4 mm. 



GENERAL NOTES. 



VICRINA DEPOSITING EGGS You maybe interested to know 

 that on November 8th, and again to-day (November loth), I found 

 Vitrinu limpida Gld., depositing their eggs. The eggs are white, 

 almost round, some of them being slightly pointed at one end, and 

 about 1 mm. in diameter. They are laid in bunches of six or eight, 

 under rotting wood on the ground. 



In the ten years during which I have been watching this "colony," 

 I have never seen a young shell, but think the eggs are hatched in 

 the early spring, the snails reaching maturity in the autumn. From 

 October to January is their active season, and during those three 

 months they can be found moving around on any pleasant day. Have 

 found them very active when the temperature was below 40 GEO. 

 H. CLAPI-, EDGEWORTH, PA. 



