GASTROCOPTA, SOUTH AMERICA. 95 



^oval, four- or five-toothed : first or strongest tooth is a twisted, 

 bifid, vertical lamina which is arched to the right, and more 

 deeply to the left, on the parietal wall; the second tooth is 

 strong, on the columella; two teeth (the third and fourth) 

 are deep in the right margin (the upper one small, the other 

 in the middle, oblique, long and laminiform) ; the fifth tooth 

 is deeply placed, small and sometimes wanting, placed in the 

 base. Peristome simple, the right margin lightly impressed, 

 almost horizontal above, basal and columellar broadly expand- 

 ing, the margins joined by a callous. Length 2 to 2%, diam. 

 114, aperture 0.8 mm. long, 0.7 wide (Miller). 



Ecuador : Guayaquil, in shady places, in gardens, especially 

 on mossy stones, abundant (Theodor Wolf). Duran, near 

 Guayaquil (Rhoads). 



Pupa (subg. Leucochila) wolfii MILLER, Malakozoologische 

 Blatter (n. F.), i, 1879, p. 127, pi. 14, f. 3. Pupa wolfii Mil- 

 ler, REIBISCH, Abhandl. naturwiss. Ges. Isis in Dresden, 1892, 

 p. 27, pi. 2, f. 11. 



As described and figured by Miller (fig. 4), this species 

 does not differ materially from G. servilis; but specimens 

 from "Ecuador" (no. 307631, U. S. N. M.) and from Duran, 

 opposite and near to Guayaquil (S. N. Rhoads, in A. N. S. 

 P.), while agreeing with wolfii in all other respects, have an 

 additional tooth, the infraparietal. This may have been over- 

 looked by Wolf and Reibisch, or undeveloped in their speci- 

 mens. 



The shell (pi. 28, figs. 1, 2, Ecuador, and pi. 28, fig. 3, 

 Duran) tapers noticeably and is light brown. The lip is well 

 expanded and thin, without a crest (this feature differen- 

 tiating it from G. riograndensis) ; lip-ends are not very 

 widely separated. The angulo-parietal lamella is exactly as 

 in G. servilis, there being a median lobe towards the periphery, 

 representing the inner end of the angular lamella. The small 

 infraparietal nodule is opposite the middle of the parietal 

 lamella, being therefore rather deep within (fig. 2). Colu- 

 mellar lamella, basal and palatal plicae as in G. servilis. 



Length 2.55, diam. above aperture 1.05 mm. ; 5% whorls. 



Length 2.1, diam. above aperture 1 mm. ; nearly 5 whorls. 



