GASTEROPODA. 353 
found here, yet seldom protruded. Mantle dull yellow, with a tinge of 
green, and bordered by a narrow line of the latter colour, fringed with 
short cirrhi; about one-third of the distance from the edge to the junc- 
tion with the foot is an encircling series of slight protuberances, which 
appear to communicate with the cirrhi, and at first look like branchial 
lamelle; at times these are very apparent, and again are scarcely 
visible. This structure brings it into approximation with the true 
Patella. [3.p.c.] Indeed it is figured as such by D’Orbigny, who 
says of the animal, “de forme ordinaire, ayant, entre le manteau et le 
pied, les lobes branchiaux trés marqués; ce qui precéde montre que 
d’apres l’animal, cette espéce appartient aux veritable Patelles, et non 
au genre Lottia ou M. Gray l’a placé.” M. D’Orbigny was doubt- 
less misled by the peculiar tubercles noticed by Mr. Couthouy, and 
his attention was thus withdrawn from the true branchial plume, 
which is really so largely developed. The range of tubercles in this 
species is highly decisive as a mark to distinguish it from the next 
Species, withont which it might be difficult to pronounce them dis- 
tinct. Mr. Gray, indeed, has included them both under his L. varia- 
bis. As two names, however, will be requisite, the name long since 
given by Lamarck to the following species, and that given by Lesson 
to this, are to be preferred to the equivocal one of Mr. Gray. 
Found in exposed situations at Vigna del Mar, Bay of Valparaiso. 
Figure 460, outside view of the shell; 460, the animal from be- 
neath. 
Lorria viriputa (Patella viridula), Lamarck; Anim. sans Vert., 
vil. 539. DeLEsserT; Recueil, &c., pl. 23, f. 2. 
AntmaL. Foot clear ochreous yellow, inclining to orange, the 
mantle of a lighter shade, and ornamented on its margin at intervals 
with numerous short, pale-yellow cirrhi. Head prolonged into a sort 
of trunk, and remarkable for the great thickness of its neck at its 
origin, which gives it a subtriangular form. Tentacles short, of a 
paler colour than the head, which is a lighter shade of the same 
hue as the foot. Eyes small and indistinct, situated near the posterior 
89 
