372 HELICINA 8$. 8. 
supera lateris dextri depressa; labium callo lato, crasso muni- 
tum. — Diverg. media circa 90*; alt. 0,6; lat. max. 0,67; 
lat. min. 0,57 poll. (A.) 
Helicina ampliata -4dams Contrib. to Conchol. N. 7. p. 101. *) 
Habitat in insula Jamaica. 
636 79. MN. temuis P'fr. 
T. turbinata, tenuissima, vix striatula, pellucida, corneo- 
albida, rubro obsolete trifasciata; spira conica, acuta; anfr. 6 
vix convexiusculi, ultimus antice non descendens, basi planius- 
culus; apertura fere verticalis, triangulari-semiovalis; columella 
brevis, basi retrorsum subdentata, superne in callum album 
nitidum, circumscriptum dilatata; perist. tenue, angulatim ex- 
pansum, margine basali cum columellae basi angulum formante. 
— Operc.? — Diam. maj. 11, min. 9, alt. 8!/, mill. (Mus. 
Cuming.) 
Helicina tenuis Pfr. in Proc. Zool. Soc. 1848. p. 124 
— . Chemn. ed. II. N. 47. p. 40. t. 7. f. 33. 34. 
B. Flavescenti-albida, anfractu ultimo medio unicingulato: cingulo angustis- 
simo e punctis luteis pellucidis composito, supra suturam ad spiram 
ascendente. (Mus. Cuming.) 
Habitat Yucatan; var. 8 in Mexico. 
637 74. NH. vernalis VYForelet. 
T. globoso-conica, tenuis, vix striatula, sub lente granu- 
lata, niüda, pellucida, citrina vel albido- aut roseo-fulva, in- 
terdum purpureo-fasciata; spira conica, acutiuscula; anfr. 5'/, 
convexiuscul, ultimus inflatus, basi convexus; apertura parum 
obliqua, subtriangulari-semiovalis; columella brevis, basi retror- 
sum subdentata, superne callum crassiusculum, circumscriptum 
emittens; perist. tenue, angulatim expansum, medio dilatatum, 
margine basali vix arcuato. —  Operc. tenue, castaneo-purpu- 
reum. — Diam. maj. 9?/,, min. vix 8, alt. 7 mill. (Coll. Nr. 51.) 
*) Shell conic: whitish (?): with a few excessively fine striae of 
growth; otherwise smooth and shining: apex subacute: spire much elevated, 
with the outlines moderately curvilinear: whorls five and one half, a little 
convex, with a distinct suture; last whorl subangular, anteriorly subplanu- 
late: aperture transversely much dilated, depressed in the upper part of the 
right side: labium with a large thick deposit. This shell resembles 77. 
Jamaicensis Som., but is much larger, much less globose, and more conic. 
(Adams ] c.) 
