GASTEROPODA. 259 
sated by crowded, elevated threads, not interrupted as they pass the 
folds, about five on the penultimate whorl; some of these, generally 
one next the suture, and one about the middle of the last whorl], being 
larger than the others, are rendered somewhat spinous. Colour ashy- 
white, the interspaces of the revolving lines rusty-brown, and some- 
times banded by an occasional still darker lme. Spire short, conic ; 
whorls six, the upper ones nearly flat, the last large, globose, five- 
eighths the length of the shell. Aperture half the length of the shell, 
broad-oval, channeled posteriorly; lip thickened, crenulate, sulcate 
within to the edge; pillar strongly arcuated, with a retral lamina, 
elsewhere finely granulate, corrugate, extensively but not thickly 
covered with callus; siphonal constriction very deep, region white, 
notch very narrow, throat white. 
Length nine-twentieths of an inch; breadth eight-twentieths of an 
inch. 
Inhabits the Samoa Islands. 
Remarkable for its broad, abbreviated form. In some of its charac- 
ters it is allied to N. murzcata, but its surface has much more nume- 
rous and more delicate asperities. Some specimens are distorted and 
still more finely sculptured, losing in a great degree the longitudinal 
folds. Bucc. scabrum, Dunker, must be like it, but is described as 
larger, more solid, and slender. 
Figures 326, 326 a, two views of the shell, enlarged; 326 0, natural 
size ; 326c, aperture, enlarged. 
NASSA CINCTELLA (Could). 
T. solida, ovato-conica, nitida, albida linea unica rufa cincta, plicis lon- 
gitudinalibus acutis ad decem et striis volventibus ad octo decussata: 
spira conica, anfractibus septem planiusculis angusté tabulatis, ultimo 
subgloboso trientes duos longitudinis teste adequante: apertura an- 
gusta, ovalis, dimidiam longitudinis teste haud equans: labro crenu- 
lato, extus tncrassato, intus septem-sulcato ; columelle callo haud ap- 
presso, concinneé rugoso ; incisura stphonali angusta, profunda. 
