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 ct 
Contr. to Conchol. N. 8. p. 135. *) 
Habitat in insula Jamaica. 
5. A. Gossel Pfr. 716 
T. depresso-globosa , solida, pustulis seriatis subasperata, 
nitidula, fuscidulo-rubra ; spira convexa; anfr. 4 '/ 2 parum con- 
vexi, ultimus rotundatus; apertura triangulari-semiovalis, intus 
carnea, nitida; columella basi truncata, retrorsum in callum 
crassum carneum abiens ; perist. subincrassatum , expansum, 
juxta columellam vix incisum. — Operc. ? — Diam. maj. 19, 
min. 15 'A? alt. 13 V 2 mill. (Mus. Cuming.) 
Helicina 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 A.majore forma magis rotundata (ratione diametrum 
et altitudinis) , epidermide pustulosa, basi columellae a peristomate emargi- 
natione levi separata. 
6. A. palliata Aslg&a&is. 717 
T. globoso-conoidea, solida, fusco-rubra, epidermide dense 
brevipilosa induta; spira conoidea, acutiuscula; anfr. 5 V 2 vix 
convexiusculi , ultimus antice deflexus; apertura diagonalis, 
triangulari-semiovalis; columella brevis, in dentem antrorsum 
arcuatum desinens, fissura profunda, angusta, strictiuscula a 
perist. subincrassato , carneo, expanso separata; callus basalis 
semicircularis, medio crassus, aurantiacus. — - Operc. immersion, 
solidum, semiovale, opalinum. — Diam. maj. 15 r / 2 , min. 13, 
alt. II 1 /, mill. (Coll. Nr. 79.) 
*) Shell globose conic, 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 //. consanguinea , 
but the sides are less divergent. — In form it approches more nearly to 
H. ampliala and //. Jamaicensis, than any of the group. (Adams 1. c.) 
