STOASTOMA §. 4. 
327 
Stoastoma Hollandianum Adams in Ann. Lyc. N.-York V. N. 2. p. 65. 
— — Adams Contrib. to Conchol. N. 8. p. 149. *) 
Habitat in insula Jamaica. 
18. St. Blandiamim Adams. 543 
T. perforata, subdiscoiclea , sub lente confertim spiraliter 
striata (striis nonnullis elevatioribus) , flavido - albicans ; spira 
vix elevata; anfr. 37 2 vix convexiusculi, ultimus latus, rotun- 
datus, antice descendens, basi planiusculus ; apertura oblicpia, 
semiovalis; perist. simplex, continuum, margine dextro arcua- 
tim dilatato, columellari soluto, basali in laminam parum pro- 
minentem continuato. — Diam. maj. 2*/ 4 , min. 2, alt. 4 /s mill. 
(Mus. Cuming.) 
Stoastoma Blandianum Adams Monogr. p. 6. **) 
— — Pfr. in Zeitschr. f. Mai. 1850. p. 63. 
/?. Dimidio minor. (Mus. Cuming.) 
Habitat in insula Jamaica. 
19. §t. Agassizianum Adams, f 544 
T. subdiscoidea, carinis 4 prominentibus, acutis, lineisque 
paucis spiralibus, elevatis, superis sculpta, cornea, subdiaphana ; 
spira vix elevata; anfr. 3 l / 2 planulati, ultimus subtus planu- 
latus, antice rapide descendens, breviterque solutus; apertura 
vix campanulata ; labrum reflexiusculum , rotundatum , non 
crenulatum; umbilicus mediocris, lamella spirali valde elevata, 
super umbilicum arcum latum formante. — Diverg. 165°; 
long. 0,065; lat. max. 0,118; lat. min. 0,095 poll. (Ad.) 
Stoastoma Agassizianum Adams Contrib. to Conchol. N. 9. p. 158. ***) 
Habitat in insula Jamaica. 
*) This shell much resembles S. Tappanianum. It is most readily 
distinguished by its inferior size, and by the greater number of fine spiral 
striae. (Adams 1. c.) 
**) T. subdiscoidea, albida vel cornea, carinis spiralibus exilibus multis 
ornata; spira paululum elevata; anfr. 3'/ 2 ; apertura campanulata; labro 
multo producto, vix pectinato ; labio multo soluto ; umbilico lato, haud pro- 
fundo , lamella spirali instructo. — Diverg. 150°; long. 0,64; lat. max. 
1,52; lat. min. 1,27 mill. (Adams 1. 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 ip a 
rather thin curved lamella, extends over half the entrance of the umbilical 
arch. (Adams 1. c.) 
