THE NAUTILUS. 15 



Under plants on the summit of Thunderhead Mountain. (Mrs. 

 Geo. Andrews, June, 1894.) 



With the general aspect of 0. inornata, this species is even more 

 polished, with somewhat rounder aperture and notably narrower 

 spire. This last difference is very perceptible on comparing the 

 upper surfaces of the two species. 0. andrewsce is also in the Acad- 

 emy collection from Macon Co., Georgia, collector unknown. The 

 name must not be confused with Zonites andrewsi, which is a species 

 of Gastrodonta, a genus belonging to quite a different division of the 

 Zoiiitidce. 0. rugeli is a more capacious shell with wider spire than 

 andrewsce. 



0. Andrews* montivaga n. v. 



Like the type in the shining surface, etc., but with five whorls, 

 chestnut above, slightly paler and subtranslucent below ; last whorl 

 more widened toward the aperture, more sloping. Aperture quite 

 oblique, wider and shorter than in andrewsce, the upper and basal 

 margins sub-parallel ; baso-cn/umellar lip very gently curved, not 

 deeply rounded as in andrewscr. Interior without white lining, 

 having only a narrow white rib within the lip. Alt. 8'7 ; diam., 

 greater, 17 ; lesser, 13'5 mm. ; width of spire S'5 mm. 



Same locality and collector. The very much straighter basal lip 

 and lack of white lining differentiate this from preceding species. 



Gastrodonta (Pseudohyalina) patuloidea n. sp. 



.Shell about the size and form of Pyramidnla striatella Anth. ; 

 light green, hardly transparent ; irregularly but closely rib-striate 

 above, below and in the umbilicus, the first 1 whorls smooth. 

 Whorls 4?, slowly increasing, convex, with impressed sutures; last 

 whorl rather tubular, rounded at periphery and below ; aperture 

 about the size of umbilicus, round-lunate, flattened above, lip sim- 

 ple, the upper margin flattened down and arched forward, as in Sele- 

 nites or Gastrodonta elliolti; retracted at insertion. Umbilicus large, 

 showing all the whorls very plainly. Alt. 2'5, diam. 5'1 mm.; 

 aperture, alt. and width about T8 mm. 



Thunderhead Mountain, under bark of a rotten log with P. alter- 

 nata (ribbed), P. perspectiva, Gastrodonta elliotti, etc. (Mrs. George 

 Andrews, June, 1894). 



Two adult specimens collected. It is much smaller than G. elli- 

 otti Redf., with far larger, open umbilicus and heavier sculpture, 

 recalling a Pyramidula. 



