UROCOPTIS, S. G. GONGYLOSTOMA. 221 



Length 18, diam. 3.8 mm. ; whorls 



Length 18, diam. 3.5 mm. ; whorls 



Length 16, diam. 3.8 mm. ; whorls 12%. I Ferinicea. 



Length 12.5, diam. 3.3 mm. ; wiiorls lO 1 /^. j 



Figs. 41, 42 represent typical specimens received from 

 Poey many years ago, probably from the original locality. 

 Figs. 43, 44, 45 are copies of Pfeiffer's original figures. Fig. 

 66 is the pillar of a specimen of the same form from Feri- 

 nicea. The chief variation, aside from the usual mutability 

 in size noted in the measurements given above, is in the 

 internal pillar, which occasionally has a minor median cord, 

 such as I have drawn in fig. 64 of pi. 53, or even approaching 

 the structure shown in fig. 52. There is also a form with a 

 narrow brown band bordering the suture below (fig. 46). 

 In this form the upper lamella is the larger in the median 

 whorls, and there is a low intermediate cord, as in some speci- 

 mens of typical elegans. It was found by Gundlach on the 

 plantation "Union," where also the brown-sutured U. cae- 

 cilicc occurred. (Cf. Pfr., Conchyl. Cab., p. 24, var. no. 4.) 



90 a. Var. auberiana (Orbigny). PL 53, figs. 56, 57, 51, 

 52, 53. 



Somewhat broader, and usually more swollen in the middle, 

 shells of the same length being more or less fusiform, wider 

 than in U. elegans, and with fewer whorls; corneous or 

 brownish-corneous. Neck usually a little shorter. Axis 

 with the upper lamella perceptibly larger than the lower, 

 and usually a smaller lamella revolves between them. 



Length 18, diam. 4 mm. ; whorls 12. 



Length 15.5, diam. 4 mm. ; whorls 10. 



Length 13, diam. 3.6 mm.; whorls 10. 



Length 13, diam. 3.5 mm.; whorls 10 (Orbigny 's type). 



Pupa auberiana ORB., in de la Sagra's Hist. Cuba, Moll., i, 

 p. 184, pi. 12, f. 21-23. PFR., Monogr., ii, p. 376. Cyl. 

 elegans SOWERBY, C. Icon., xx, pi. 4, f. 30. 



Orbigny 's specimens of auberiana were supplied by Poey, 

 and some received from the same naturalist under that 

 name are in the collection of the Academy. 



