ALEXIA $. 1. 145 
indefesso characteres offerunt sufficientes ad distinguendas 
species. 
In duas sectiones distribui possunt: 
A. Labro distinete pluridentato . . .. .$.1. Nr. 1—2. 
B. -—  ealloso, interdum subunidentato $.2. — 3—-12. 
$T. 
|l. A. denticulata (Voluta) Wontagu. 
T. imperforata, ovato-elliptica, tenuis, pellucida, laevis, 
nitida, corneo-lutescens; spira exserta, conica, acuta; sutura 
marginata; anfr. 7 vix convexiusculi, ultimus spiram aequans, 
basi attenuatus; apertura subverticalis, anguste semiovalis; 
dentes parietales 3, superi 2 minuti nodiformes (supremus in- 
terdum obsoletus), tertius compressus, transverse intrans; plica 
columellaris obliqua, torta; perist. simplex, rectum , acutum, 
margine dextro leviter arcuato, intus dentibus 3 — 6 magis 
minusve distinctis, introrsum elongatis, armato, columellari 
vix dilatato. -— Long. 10, diam. 4 mill. 
g Ap. 5 mill. longa, 
2 lata. (Coll. Nr. 95.) 
Voluta. denticulata. Mont. 'Test. Brit. p. 234. t. 20. f. 5.*) 
— — .. Mat. et Rack. in Linn. Trans. VIII. p. 130. 
-- Pull. Dors. Catal. p. 44. t. 18. f. 1. 
— — Dill». Descr. Cat. I. p. 506. n. 18. 
— -- Wood Ind. p. 90. t. 19. f. 18. 
-— -— Turt. Coneh. Dict. p. 249. 
— -— Berkeley iu Zool. Journ. V. p. 428. t. 19, f. 3, 
(anat.) 
—  mingens Turl. Conch. Dict. p. 250. 
— reflexa Turt. Conch. Dict. p. 251. 
Turbo bidentatus Walk, 'Test. min. rar. f. 50. 53. (t. Mont.) 


*) V. with seven or eigth volutions, tapering to a fine point, the lower 
one large, the others gradually decreasing: of a semi-pellucid horn-colour, 
inclining to purplish-brown towards the top: aperture oblong-oval, half the 
length of the shell; outer lip furnished with two or three tubercles near the 
margin, and frequently with three or four white denticulations further within 
the aperture: Columella plicated, with three or four white folds, which are 
much elevated, and appear like teeth, but spirally turn with the Columella. 
Length near half an inch; breadth not a quarter. It is subject to some 
variety with respect to the denticulations of the outer lip; some have more, 
others less, or even destitute of them in young shells: the plications on 
the Columella vary also from two to four, but most commonly three . . . . 
A remarkable character of this shell is, that the Columella extends no 
further than the upper part of the body volution; the superior spires being 
destitute of any pillar, or internal spiral division. (Mont. l. c.) 
10 
183 
