64 
* B. INCRASSATUM. B. Minimum. Turt. Lin. B. M’" 
nutuni. Pen. Brit. Zo., vol. 4, pi. 79, inner angle benea" 1 
tlie left hand. B. Manilla. Mont. Test. Brit., vol. 
p. 241, pi. 8, fig. 4. Nasa I. Flem. Brit. A., p. 34<F 
Common. 
Naturalists seem to have overlooked, or considered perhap- 
as a younger state, of this shell, one that seems to have goo< 
claims to be regarded as a distinct species. Its general fort? 
is like that of B. I. but the whorls and ribs have a mo re 
inflated appearance. This is more especially the case wit 
the outer lip, which, viewed from above, shews more dilate 1 ’ 
but observed below, that which in the one is more solid pu* 
tnberculated, is in the other hollowed out, inflected and thin • 
leaving the aperture more than twice as large, in shells 0 
equal magnitude. The outer edge is also more circular 
advances further up the whorl, and closes more over |t- 
There is no plait over the columella, the pillar of which' 5 
less solid, and without the perpendicular line seen on B. >' 
The substance also is more thin. It is scarcely common, 1,11 
occurs in similar situations with the other, along our coast. 
B, BREVE? A small shell which answers best to the ol>J 
scure species referred to by Montagu, vol. 1, p. 2 )0, aI) 
by Fleming, p. 344, as described by Walker under t!" 
name, is among the small collection I was favoured " r| 
by Mr. Curnow of Newlyn ; who obtained it near 
Land’s-end. The length of die specimen is about a li" 8 ' 
the greatest breadth something less. The whorls fi ve ’ 
rounded, separated by a well marked division ; sum"’ 1 * 
rather blunt; upper whorls smooth, perhaps from havh’r 
been rubbed : the two lower whorls prominently ribbed' 
the ribs wide, high, regular, rounded : those on the lo"’ 1 
whorl ending on a circular rib, which begins at the uni 81 ’ 
of the outer lip with the body, and passes round obliq° c •, 
downward. This lower whorl is proportionately la'r 8 - 
aperture moderate, outer lip simple, canal short, al! ’ 
formed as in the genus Nasa of Fleming. Colour vvh> 
TEREBRA. 
GENERIC CHARACTER: The shell lengthened, ^ 
reted, very pointed above, aperture longitudinal, 
times shorter than the spire, and notched at the 
part of the base. Bottom of the Columella twisted 0 
oblique. % 
T. PERVERSA. Turbo Punctalus. Turt. Lin. M l,r « 
Adversus. Mont. Test. Brit., vol. 1, p. 271. 4* 
Flem. Brit. An., p. 347. Montagu found it sparingly- 
COLUMELLARIA. g5 
No canal at the base of the aperture ; but a more or 
distinct subdorsal notch, and plaits on the columella. 
