46 HELIX CORYDA. 



placed by Pfeiffer in both Dialeuca and Polymita. I have not seen 

 specimens. 



H. MELANOCEPHALA Guncllacll. PI. 32, fig. 48. 



Imperforate, globose-conical, somewhat depressed, rather thin but 

 solid, opaque, rather shining, smooth, scarcely marked by growth- 

 lines, pure white, covered with a very thin yellowish cuticle, encir- 

 cled by the deep-brown, narrow, well-defined bands ; spire more or 

 less elevated, conoidal, apex obtuse, light or dark purple ; whorls 

 4, slightly convex, the last depressed-globose, abruptly and rafher 

 deeply deflexed anteriorly ; aperture round-lunar, very oblique, tri- 

 fasciate within ; peristome narrowly labiate, white, upper margin 

 arcuate, baso-columellar margin slightly concave, flattened, wide 

 above, inserted in the center of the axis. 



Alt. 11-12, diam. 14-16 mill. 



Guantanamo and Mayari, Eastern Cuba. 



H. melanocephala GUNDL. in PFR. Mai. Slat. 1859, p. 88 ; Mon- 

 ographia v, p. 50. ARANGO, Fauna Mai. Cabana, p. 64. 



A small, compact species, trifasciate with brown, and with abruptly 

 deflexed last whorl. 



Var. PERELEVATA Pilsbry. PI. 32, fig. 49. 



More elevated, globose, last whorl more descending anteriorly ; 

 trifasciate with brown, with an orange sub-sutural zone and one or 

 two green spiral bands. Alt. 13, diam. 13-14 mill. 



Cayo de Rey, Cuba. 



H. VIGIENSIS Weinland. PL 14, fig. 85. 



Imperforate, globose-depressed, obsoletely striate, solid, rather 

 shining, whitish, frequently with scattered brown dots, encircled by 

 three brown interrupted bands, the peripheral one strongest ; spire 

 obtuse, depressed, apex rosy-brown ; whorls 5, somewhat convex, the 

 last abruptly and deeply descending ; base more or less excavated 

 around the axis ; aperture oblique, pinkish-brown within, lunate- 

 oval ; peristome acute, callous within, slightly expanded, margins 

 sub-converging, columellar margin dilated, a little reflexed, im- 

 pressed. Diam. maj. 14-17, min. 12-15. mill. ( Weinland.y 



Gonaives, Hayti. 



H.vigiensis WEINL. Jahrb. d. Mai. Gesell. vi, 1880, p. 374, t. 12, 

 f. 20. 



Weinland says: There lie before me 18 examples of this species, 



