58 



MOLLUSCA. 



[Gasteropoda 



stria?, formed by continuous links, which, however, can only he 

 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. Bulljsa punctata, pi. XIX, f. 45, 46; and Supple- 

 mentary plate, f. 1,2. 



Bullosa punctata, Turton, Mag. Nat. Hist., VII, p. 358 ; 

 Bulla puntata, Adams, Linn. Tr., V, p. 2, pi. 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 

 catena of Montagu. The shell is something smaller, of a more 

 oval shape, with the crown more flattened ; and, instead of oval, 

 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. First 

 discovered on the coast of Pembroke, by Mr. Adams. 



Genus 6. — Utriculus. — 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. Utriculus plicatus, pi. XIX, f. 1, 2 — First Ed., pi. 

 19, f. 1, 2. 



Shell rather strong, smooth, dull milk-white, and subopaque; 

 bodv 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. Utriculus discors, pi. XIX, f. 3, 4 First Ed., pi. 



38, f. 3, 4. 



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 



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. Utriculus obtusus, pi. XIX, f. 5, 6 First Ed., pi. 



38, f. 5, 6. 



Bulla obtusa, Montagu, p. 223, pi. 7, f. 3 ; Maton and 

 Rackett, p. 128; Brown, Ency. Brit., VI, p. 434; lb., Wer- 

 nerian Mem., II, p. 517; Bulla perperam, Walker, pi. 3, f. 62; 

 Retusta obtusa, Brown, Popular Ency., II, p. 378, pi. 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 over 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. Utriculus Lima, pi. XIX, f. 39, 40 First Ed., pi. 



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. Utriculus minutus, pi. XIX, f. 7, 8 — First Ed., pi. 

 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. Length one-sixteenth 

 of an inch ; diameter not quite so much. 



Found at Dunbar, by General Bingham. 



