230 GJEOTIS. 



G. MALLEATA Pilsbry, n. sp. PI. 62, figs. 36, 37, 38, 39, 40. 



Shell intermediate between G. nigrolineata and G. albopunctulata, 

 more convex, larger and more solid than the former, decidedly more 

 flattened above than the latter species. Milky-translucent, the very 

 thin cuticle with a faint yellowish tint; apex a trifle projecting; 

 whorls about 2J, the suture margined, its last half turn far more 

 widely deviating than in G. nigrolineata, being much as in G. albo- 

 punclulata, but less descending. Surface with irregular growth- 

 wrinkles, numerous superficial spiral cords, and a generally distributed 

 jine malleation y oblique in the peripheral region. Periphery well 

 rounded ; baso-columellar margin with a broad membranous edge ; 

 cavity of the spire well open ; peristome narrowly brown- edged. 

 Convexity 3.7, length 13, breadth 9.7 mill. 



Near San Juan, Porto Rico (Robert Swift). 



Differs from G. nigrolineata in the malleated surface and deviating 

 suture. G. flavolineata is described as larger, with obtusely suban- 

 gulate last whorl and decussated surface. G. albopunctulata is much 

 more globose and solid, but has much the same sculpture. 



G. ALBOPUNCTULATA Shuttleworth. PI. 62, figs. 45, 46, 47, 48. 



Shell rather solid, opalescent-whitish, covered with a very thin 

 epidermis ; plicatulate with flexuous growth-lines, decussated and in 

 a manner obsoletely wrinkle-malleated by somewhat crispate spirals ; 

 spire minute, very shortly papillar ; whorls 2, very rapidly widen- 

 ing, a little convex, the last whorl large, inflated, quite rotund, de- 

 scending in front, depressed and deflexed ; suture margined, some- 

 what crenulated. Aperture very oblique ; peristome with the right 

 margin flexuously produced forward, basal and columellar margins 

 with a membranous margin. Alt. 8, greatest diam. 19, lesser diam. 

 14 mill. 



Animal large, pellucid, white, spotted with opaque white dots. 

 Liver pale greenish. 



Humacyoi Porto Rico, on tree trunks, very rare (Blauner). 



G. albopunctulata SHUTTL., 1. c., p. 36. PFR., Monogr. v, p. 12. 

 CROSSE, Journ. de Conchyl., 1892, p. 22. 



Larger, more solid, and decidedly more globose than the other 

 species, with the cavity of the apex more concealed. The sculpture 

 is also somewhat stronger, though the malleation is not clearly vis- 

 ible without a lens. The suture deviates far more than in G. nigro- 



