332 CRYPTELASMUS. 



Balea ( ?) canteroiana GundL, PFR. ? Malak. BL, iv, 1857, 

 p. 107; Monogr., iv, p. 715. ARANGO, Fauna Mai. Cubana, 

 p. 89. Pseudobalea c., CROSSE, Journ. de Conchyl., 1890, p. 

 244. 



The parietal lamella in the adult form is nearly one whorl 

 long. In the third whorl from the base there are three 

 lamellae : parietal and axial large, the latter thick at the edge, 

 and a small lower axial ; none of them extend into the next 

 earlier whorl (fig. 2, shell 13.7 mm. long). The two speci- 

 mens figured measure : 



Length 16, diam. 3, aperture 2.7 mm. ; whorls 15. 



Length 16.8, diam. 3, aperture 3 mm. ; whorls 15. 



Figs. 1, 2, 4, 5, 7 represent specimens from a cave near the 

 foot of the hill "La Vigia" at Trinidad. Figs. 3, 6, 8, 9 are 

 the variety from near Cienfuegos, where I found it in some 

 numbers, but chiefly dead and broken. 



The eggs (pi. 48, figs. 4, 5, Trinidad) are calcareous-shelled 

 as usual, quite flattened, and 1.25 mm. in greatest diameter. 

 The embryonic shell is smooth and very obtuse above, the 

 first and second whorls are disproportionately large, the third 

 narrower. 



Var. cienfuegosensis n. subsp. PI. 48, figs. 3, 6, 8, 9. 



The shell is smaller than typical canteroiana, with fewer 

 whorls than young shells of the latter of the same length; 

 the internal lamellae are longer, all thin-edged; apex a trifle 

 larger; aperture relatively larger. 



Length 13.5, diam. 3 mm., whorls 13. 



Length 12.3, diam. 2.8 mm., whorls 11%. 



A shell of 3.5 mm. length with 4% whorls (fig. 9, Cien- 

 fuegos) has the parietal lamella well developed, extending 

 inward about 2 whorls, being visible through the transparent 

 shell. The axial lamella is also strong, and continues to the 

 columella. At a somewhat later stage, length 6 mm., both of 

 the lamellae are 2% whorls long (fig. 6, Cienfuegos). At the 

 adult stage (fig. 3) the Cienfuegos race has a parietal lamella 

 about one whorl long, the axis in the last two whorls being 

 simple, straight and slender. In the third whorl from the 



