ALCADIA. 407 
latiuscula, parum profunda. — Diverg. media 60?; lat. max. 
0,65; lat. min. 0,52; alt. 0,4 poll. (Ad.) 
Helicina microstoma Adams in. Ann. Lyc. N.-York V. N. 2. p. 51 et 
Contr. to Conchol. N. 8. p. 135. *) 
Habitat in insula. Jamaica. 
5$. A. Gossei E'fr. 116 
T. depresso-globosa, solida, pustulis seriatis subasperata, 
nitidula, fuscidulo-rubra; spira convexa; anfr. 4'/, parum con- 
vexi, ultimus rotundatus; apertura triangulari-semiovalis, intus 
carnea, nitida; eM basi truncata, retrorsum in callum 
crassum carneum abiens; perist. gubinarus patum expansum, 
juxta columellam vix incisum. — Operc.? — Diam. maj. 19, 
min. 15'/, alt. 139, mill. (Mus. Conan 
Hoelicina Gossei Pfr. in Proc. Zool, Soc. 1848. p. 122 
— — .. Chemn. ed. II. N. 29..p. 28. t. 6. f. 11. 12 
Habitat in insula Jamaica (Gosse). 
Obs. Differt ab 44. majore forma magis rotundata (ratione diametrum 
et altitudinis), epidermide pustulosa, basi columellae a peristomate emargi- 
natione levi separata. 
6. A. pallinis Adams. 1 
T. globoso-conoidea, solida, fusco-rubra, epidermide dense 
brevipilosa induta; spira conoidea, acutiuscula; anfr. 5'/, vix 
convexiusculi, ultimus antice deflexus; apertura diagonalis, 
triangulari- semiovalis; columella brevis, in dentem. antrorsum 
arcuatum desinens, fissura profunda, angusta, strictiuscula a 
perist. subinerassato, carneo, expanso separata; callus basalis 
semicircularis, medio crassus, aurantiacus. — Operc. immersum, 
solidum, semiovale, opalinum. — Diam. maj. 15'/, min. 13, 
alt. nj mill. (Coll. Nr. 19.) 
*) Shell globose conie, moderately thickened: brown, shaded off to a 
smoky white along the suture and on the periphery of the last whorl: with 
rather light striae of growth, in which are a few spiral series of punctures : 
apex obtuse: spire with the outlines more or less and not uniformly cur- 
vilinear: whorls rather less than five, moderately convex, with a well im- 
pressed suture; last whorl subplanulate beneath: aperture semi-elliptical, 
compressed above and below, laterally dilated; with the lip sinuate, well 
expanded and reflected except at the extremities; with the slit not very 
deep, rather wide. — The slit is about as deep as in A. consanguinea, 
but the sides are less divergent. — In form it approches more nearly to 
H. ampliata and. H.. Jamaicensis, than any of the group. (Adams l. c.) 
-b 
