6 GIBBULINA, GASTROCOPTA. 



GIBBULINA iNFUNDiBULiFORMis (Orbigny). PL 28, figs. 5, 6. 



Shell very short, conic, thin, striate, provided with a very 

 large, funnel-shaped umbilicus, in which a large part of each 

 whorl may be seen. Spire conic, short, with a rather obtuse 

 summit, composed of 6 swollen whorls, separated by a strongly 

 marked suture. Aperture entirely lateral to the axis, oblong 

 and oblique, provided with a strong tooth or elevated lamella 

 which penetrates into the interior ; it is situated on the pari- 

 etal wall. The margins of the lip are thick and a little re- 

 flected. Color, uniform grayish. Length 2.5, width 1.5 mm. 



Distribution. - - Bolivia, at a place called Pampa E-uis, 

 Province of Laguua, 011 the last foothills of the eastern slope 

 of the Bolivian Andes, under stones and moss, on precipitous 

 ridges. 



Helix infundibuliformis ORB., Mag. de Zool., 1835, p. 21. 

 Pupa infundibidiformis ORB., Voyage dans 1'Amerique Meri- 

 dionale, p. 323, pi. 41 bis, f . 7-9. - - PFEIFFER, Monogr. Hel. 

 Viv., ii, 331. 



This remarkable snail is known only by d 'Orbigny 's de- 

 scription and figures. 



Genus GASTROCOPTA Wollaston. 



Gastrocopta WOLLASTON, Testacea Atlantica, 1878, p. 515, 

 for Pupa acarus Bens, and Pupa gorgonica Dhrn. 



Leucochilus BOETTGER, in von Martens, Conchologische 

 Mittheilungen, I, 1881, p. 64. Not Leucochila von Martens, 

 1860. 



Bifidaria STERKI, in Pilsbry, Proc. Acad. Natural Sciences 



of Philadelphia, 1891, p. 315, for P. contracta and P. servilis. 



-STERKI, Nautilus VI, p. 4, 1892, and p. 99, 1893. PILSBRY, 



Proc. A. N. S. Phila., 1900, p. 590. BALL, Nautilus XVII, 



p. 116, 1904, type B. servilis Gld. 



Includes also Eubifidaria, Albinula, Vertigopsis and Priva- 

 tula, Sterki, 1893. Immersidens Pilsbry and Vanatta, 1900. 



The shell is rimate or perforate, cylindric or ovate-conic, 

 having angular and parietal lamellae more or less completely 

 united into one biramose, bifid, lobed or sinuous lamella (or 

 rarely the angular lamella is wanting). Columellar lamella 



