344 MALACOZOA. GASTEROPODA. 



plicae, and delicate, rather distant, punctulate spiral striae, of 

 which there are about fifteen on the last turn ; the aperture 

 nearly a third of the whole length, oval, with the outer lip 

 convex, slightly thickened externally, the inner reflexed, leav- 

 ing a small umbilical groove. Length three-twelfths and a- 

 fourth, breadth one-twelfth. 



An individual, considerably worn, found in February, 1843, 

 adhering to an Actinia, from off Aberdeen, by Mr. Alexander 

 Beaton. 



Helix decussata. Mont. Test. Brit. 399. PI. 15. f. 7.— Phasianella 

 decussata. Flein. Brit. Anira. 302. 



Genus Buccinum. 

 Buccinum minimum. Little Brown Buccine. 



Shell oblongo-conical, rather thin, with six mode- 

 rately convex, transversely-ribbed, and longitudinally 

 sulcato-striate turns, the notch of moderate width, and 

 somewhat oblique. Minimus, very small. 



Shell oblong, with six turns, of which the upper two are 

 smooth and glossy, the rest transversely ribbed, and longitu- 

 dinally sulcato-striate ; the ribs nearly straight, fifteen on the 

 last turn, on the anterior part of which they are nearly obso- 

 lete ; the apex obtuse ; the suture distinct; the aperture much 

 less than half the whole length, narrow-oval, the pillar twisted, 

 the outer lip thin and plain, the notch little oblique, and of 

 moderate width; the colour uniform dull olive, that of the 

 aperture greyish-white. Length two-twelfths and a-third, 

 breadth nearly one-twelfth. 



A single specimen found by me in February, 1843, at 

 Aberdeen. 



Buccinum minimum. Mont. Test. Brit. 247. PI. 8. f. 2.— 

 Buccinum brunneum. Donov. Brit. Sh. v. PI. 179. f. 2. — Fusus 

 minimus. Flem. Brit. Anim. 350. 



Family Fissurellina. P. 1/6. 



Genus 4. Fissurella. 



Animal oblong or oval, covered by a univalve shell ; 

 head distinct, with two short, conical tentacula, bear- 

 ing the eyes on prominent tubercles at their base exter- 

 nally ; mouth proboscidiform, foot very large, oval or 

 oblong, margined externally with tubercular or tcntacu- 



