58 MOLLUSCA. 
strie, formed by continuous links, which, however, can only be 
seen by the aid of a strong lens. Length one-eighth of an 
inch; breadth somewhat less. 
Found in Bigberry Bay, Devonshire, and on the coast of 
Pembrokeshire; it is also met with on the Dorsetshire and 
Northumberland coasts, Frith of Forth, and Frith of Clyde. 
3. Butima punorara, pl. XIX, f. 45, 46; and Supple- 
mentary plate, f. 1, 2. 
Bullza punctata, Turton, Mag. Nat. Hist., VII, p. 358; 
Bulla puntata, Adams, Linn. Tr., V, p. 2, pl. 1, f. 6, 7, 8. 
“Shell oval, transparent, with transverse lines of distinct, 
impressed dots; crown canaliculate. 
“The accurate observations of Mr. Clark, who favoured us 
with specimens, have fully distinguished this species from Bulla 
The shell is something smaller, of a more 
oval shape, with the crown more flattened; and, instead of oval, 
catena of Montagu. 
raised, chain-like points, which form the lines in B. catena, the 
lines in this species consist of distinct impressed dots. 
“Mr. Clark has also been able to ascertain, that, in B. catena, 
the animal is of a yellowish-white, and furnished with a gizzard; 
but that the animal of B. punctata is of a blackish-gray colour, 
and destitute of any trace of gizzard. 
«Found by Mr. Clark, near Exmouth.’— Turton. 
discovered on the coast of Pembroke, by Mr. Adams. 
First 
Genus 6.—UrtricuLus.—Brown. 
Shell small, oblong-ovate, or subcylindrical ; provided with a 
visible, very short spire, with rather inflated volutions; aperture 
as long as the body volution, always contracted above, and wide 
beneath. 
Section I— Body subcylindrical ; spire a little prominent. 
1. Urricuius piicatus, pl. XIX, f. 1, 2.—First Ed., pl. 
19, f. 1, 2. 
Shell rather strong, smooth, dull milk-white, and subopaque; 
body very large, subcylindrical, with nearly obsolete, longitudi- 
nal wrinkles, or lines ‘of growth; spire small, consisting of three 
somewhat inflated and prominent volutions, well separated by 
the sutural line, the lower one with a strong thread-like line at 
its base, which extends half way round its circumference ; apex 
rather obtuse; aperture narrow, as long as the body, contracted 
above, somewhat compressed in the middle, and wide below, 
and terminating in a rounded base; outer lip thin, slightly in- 
flected towards the centre; inner lip a little thickened on the 
columella, and near its base provided with two oblique, almost 
obsolete folds. Length one and a half eighth of an inch; dia- 
meter about half its length. 
Discovered at Dunbar, by General Bingham. I found a 
variety of this species at Kirkcaldy, Fifeshire, with the volutions 
of the spire hardly visible. 
2. Urricuius piscors, pl. XIX, f. 3, 4.—First Ed., pl. 
Shab oh 2s 
Shell moderately strong, subcylindrical, white, and slightly 
glossy, with obsolete, longitudinal lines of growth; body large ; 
spire small, consisting of three inflated, rounded, well defined 
volutions, terminating in an obtuse apex; aperture long, narrow, 
being about three-fourths the length of the body, straitened 
above, slightly compressed in the centre, and dilated towards 
[GasTEROPoDA 
the base; outer lip strong, and rounded on the margin; pillar 
lip a little reflected, and thickened on the columella. Length 
a sixth of an inch; diameter somewhat more than half its 
length. 
Found at Dunbar, by General Bingham. 
This species differs from the preceding, in being broader in 
proportion to its length, and somewhat more inflated, and is 
destitute of the thread-like line which invests the base of the 
lower volution of U. plicatus, as well as the plaits on the lower 
part of the columella, and in the aperture being shorter. 
3. Urricu.us oprusus, pl. XIX, f. 5, 6—First Ed., pl. 
38, f. 5, 6. 
Bulla obtusa, Montagu, p. 223, pl. 7, f. 3; Maton and 
Rackett, p. 128; Brown, Ency. Brit., VI, p. 434; Ib., Wer- 
nerian Mem., II, p. 517; Bulla perperam, Walker, pl. 3, f. 625 
Retusta obtusa, Brown, Popular Ency., I, p. 378, pl. 17, f. 
110. 
Shell subcylindrical, moderately strong, white, opaque, and 
longitudinally wrinkled; body long; spire short, consisting of 
three somewhat depressed volutions, terminating in an obtuse 
apex; aperture as long as the body, straitened above, and ex- 
panding below, terminating in a rounded base; outer lip thin 
at the edge, somewhat compressed in the middle; inner lip 
thickened, slightly spread oyer the base of the columella. 
Length nearly a quarter of an inch; diameter about half its 
length. 
Found on the coasts of Devonshire, Dorsetshire, Northum- 
berland, and Wales; and at Portmarnock, Ireland. 
4. Urricutus Lima, pl. XIX, f. 39, 40—First Ed., pl- 
38, f. 39, 40. 
Shell oval, oviform, rather strong, milk-white; body very 
large, much inflated; spire exceedingly small, scarcely elevated 
above the body, and consisting of two slightly inflated volu- 
tions; aperture oblong-ovate, occupying about three-fourths of 
the length of the body, contracted and pointed above, rapidly 
expanding below, and terminating in a well rounded base; outer 
lip strong, and flattened on the edge; pillar lip much reflected 
on the columella; whole surface covered with very numerous, 
oblong punctures, with their edges elevated, set in regular series 
of transverse lines, giving it much the appearance of a file when 
viewed through a strong lens. Length a quarter of an inch; 
breadth an eighth. 
This beautiful little shell was discovered at Greenock, by my 
friend Stewart Ker, Esq., and is in his cabinet. 
Section II—Body much inflated and vitreous, with the 
spire hardly protruding beyond the body. 
5. Urricutus minutus, pl. XIX, f. 7, 8—First Ed., pl. 
38, f. 7, 8. 
Shell ovate, exceedingly thin, diaphanous, and white, but not 
glossy; body very large, greatly inflated; spire exceedingly 
small, consisting of a single, blunted, papillary volution ; aper- 
ture very wide, oblong-ovate, somewhat narrowed both above 
and at the base, which is in consequence a little pointed; outer 
lip extending higher than the apex, arcuated, sharp, and slightly 
inflected on the margin; pillar lip a little reflected on the colu- 
mella, producing a subumbilicus behind. 
of an inch; diameter not quite so much. 
Found at Dunbar, by General Bingham. 
Length one-sixteenth 
