254 PATELLID#. 
white lines, within which are the usual fleshy corneous plates 
and spinous tongue; the tentacula are long, pointed, white, 
setose, with large eyes on short offsets placed very laterally at 
the exterior bases. The foot is pedicled, oval, pale yellow 
above and below, havmg around it, near its junction with 
the body, which at that part is flake-white, a cordon of about 
twenty-four short, thick, white fillets. 
In this species, the two branchial leaves are fixed by small 
united pedicles in a cavity at the back of the neck, with the 
leafy portion falling on each side the fissure; the. stomach, 
with the intestine, is enveloped by the liver, and the rectum, 
after issuing from the black green mass, which is, at the upper 
part of the animal, mixed up with the lghter-coloured ova- 
rium, is, as in the last species, embraced by the heart and two 
auricles, and terminates at the fissure. The csophagus is 
short, and encircled by three or four yellow medullary gan- 
glions, throwing off the usual nervous threads. We here 
supply an omission in the last species, by stating that in it 
nearly the same nervous arrangement is seen. 
The salivary glands are two fasciculi of filaments, greatly 
resembling those of Dentalium tarentinum. We infer from this 
circumstance that, like that animal, this also is a zoophagite, 
and feeds on scabrous food that requires a copious saliva to 
assist deglutition. . 
All the animals of the Patelloid group are without opercula ; 
it is said that the Pileopsis secretes from the foot a rudi- 
mentary testaceous lamina, but, though we have observed 
many of the P. hungarica, this peculiarity was not observed, 
and we think, when that species is spoken of below, we may 
explain what has given rise to this idea. 
The E. reticulata, and the variety, are taken in dihundenee 
at certam epochs in the coralline zone at Exmouth. The 
only other species is the 
E. crassa, J. Sowerby. 
E. crassa, Brit. Moll. ii. p. 481, pl. 63. f. 2; (animal) pl. C.C. f. 2. 
