STOASTOMA 8$. 4. 9391 
Stoastoma Hollandianum .4dams in. Ann. Lyc. N-York V. N.2. p. 65. 
— — Adams Contrib. to Conchol. N. 8. p. 149. *) 
Habitat in insula Jamaica. 
18. $t. Eilandianumnm Adams. 
T. perforata, subdiscoidea, sub lente confertim spiraliter 
striata (stris nonnullis elevaüoribus), flavido-albicans; spira 
vix elevata; anfr. 9'/, vix convexiusculi, ultimus latus, rotun- 
datus, antice descendens, basi planiusculus; apertura obliqua, 
semiovalis; perist. simplex, continuum, margine dextro arcua- 
tim dilatato, columellari soluto, basali im laminam parum pro- 
minentem continuato. — Diam. maj. 2'/, min. 2, alt. */, mill. 
(Mus. Cuming.) 
Stoastoma Blandianum dams Monogr. p. 6, **) 
— — Pfr. in Zeitschr. f. Mal. 1850. p. 63. 
B. Dimidio minor, (Mus, Cuming.) 
Habitat in insula Jamaica. 
19. $t. Agassiziamum Adams. 1 544 
T. subdiscoidea, carinis 4 prominentibus, acutis, lineisque 
paucis spiralibus, elevatis, superis sculpta, cornea, subdiaphana; 
spira vix elevata; anfr. 3'/, planulat, ultimus subtus planu- 
latus, antice rapide up breviterque solutus; apertura 
vix campanulata; labrum reflexiusculum, rotundatum, non 
crenulatum; umbilicus mediocris, lamella spirali valde elevata, 
super. umbilieum areum latum formante. —  Diverg. 165^; 
long. 0,065; lat. max. 0,118; lat. min. 0,095. poll. (Ad.) 
Stoastoma .4gassizianum .4dams Contrib. to Conchol. N. 9. p. 158. ***) 
Habitat in insula Jamaica. 
*) This shell much resembles S. Tappanianum. t is most readily 
distinguished by its inferior size, and by the greater number of fine spiral 
striae. (Adams l. c.) 
**) T. subdiscoidea, albida vel cornea, carinis spiralibus exilibus multis 
ornata; spira paululum elevata; anfr. 3'/,; apertura campanulata; labro 
multo producto, vix pectinato; labio multo soluto ; umbilico lato, haud pto- 
fundo, lamella spirali instructo. —  Diverg. 150?; long. 0,64; lat. max. 
1,52; lat. min. 1,27 mill. (Adams 1l. c.) 
***) In the only specimen now before me, there is, around the lip within, 
a deposit which contracts the aperture, and rising over the labium in a 
rather thin curved lamella, extends over half the entrance of the umbilieal 
arch. (Adams l. e.) 
