GASTEROPODOUS MOLLUSCA OF BERWICKSHIRE. 269 



4. L. 2ietr(ca, sliell conical, tlio body ventricose and larger tlian the 

 pointed spire, glossy- black, smooth ; whorls five, almost even ; 

 aperture roundish, uniform dark glossy purple, the lip thin, the 

 pillar rounded below, flat, and brought to an edge. Length Aths ; 

 breadth -i^-ths. Turbo petrteus, JJilliv. Eec. Sh. 820. Helix 

 petrfea, 2fo)d. Test. Brit. 403. 



Hah. On rocks at high water mark, not comuiou. 



The colour of the shell is frequently obscnred with extraneous matter, but its 

 total want of spiral stria3 suffices to distinguish it from all the preceding, 

 were the other characters less discriminative than they really are, for 

 this is a very distinct species. 'J'lie base of the body-whorl is often white. 

 Snail black with setaceous white tentacula, the eyes at their swollen 

 bases ; mouth proboscidiform, and, during its progress in water, the animal 

 is continually protruding and retracting the tongue; foot short, broad, 

 plain, very obtiise behind, jielhicid white with a milk-white band across 

 the front. 



5. L. nen'toides, shell subglobular, varioush' coloured, smooth or very 

 faintly striated ; whorls five, those of the spire small and depressed ; 

 throat of the aperture brown, the pillar pale. Length ~i\ths ; 

 breadth -^-oths. Forbes, Faun. Mon. 19. Nerita lictoralis, Fenn. 

 Brit. Zool. iv. 346, tab. 90. fig. 3. Filliv. Eec. 8h. 989. Turbo 

 retusus et neritoides, Lam. Anim. s. Vert. vii. 48. 



Hah. Berwick Bay, between tide marks, cotnmon. 



The colour of the sliell is commonly yellowish-brown, olive, or yellow, plain or 

 banded, but many specimens are purplish-bi'own and prettily tessellated. 

 These are reckoned by some to he a distinct species. The animal is 

 essentially the same with L. littorea, but of a yellowish colour and 

 unspotted, excepting a few minute specks on the sides and under the right 

 tentaculum. Penis with a longish suddenly acuminated point, and the 

 outer side of the broad part is roughened with granulations arranged in 

 three rows. 



On the 26th of November 1835, which was a fine day for the season and 

 rather warm, and which had been preceded by two or three weeks of wet 

 stormy weather, I visited our shore, and found that the animals were very 

 active, creeping about with the head and tentacula more than usually 

 protruded. From their unusual activity, and a certain indescribable bustle 

 about them, mj' curiosity was roused to a more attentive examination, and 

 I soon ascertained that they were busied in the great work of procreating 

 their race. Several pairs were detected in connection, the male resting on 

 the shell of the female : the yellow were coupled indiscriminately with 

 yellow or with the olive coloured, and sometimes a small immature one 

 with one full grown and aged. 



This species is oviparous, and the spawn is deposited in spi'ing on sea-weeds, 

 particularly on Fucus vesiculosus and serratus, in roundish gelatinous 

 masses about half an inch in diameter, and studded over with the imbedded 

 ova. These lie without any certain order in the common mass, bat each 

 has its own separate cell, of a sub-hexangular figure ; and in the centre of 

 the individual eggs, the young are perceptible, like in every respect to 

 their parent. 



6. Z. Uh(e, shell conical, rather thick, yellowish-brown, smooth ; 

 whorls seven, nearly flat ; aperture ovate, reflected on the pillar 

 forming a slight fissure at the base. Length |ths. Turbo Ulvse, 



