TELLINA. 127 
the stomach and intestine, exhibited no peculiarity. The 
large posterior dorsal mucous gland was well developed, the 
colour being a moderately dark brown: this gland crosses the 
dorsai line near the posterior adductor, and perhaps is a 
receptacle for the pigments of the mantle. 
This species inhabits the coralline zone at Exmouth, but is 
rarely taken alive of good size. 
T. rerroENsis, Chemnitz et nobis. 
Psammobia ferroénsis, Brit. Moll. i. p. 274, pl. 19. f. 3. 
Animal elongated, compressed, white or of the palest brown ; 
mantle open, with the margin clothed with a short white 
fringe, or rather fine dentations. The siphonal apparatus con- 
sists of the usual slender separated tubes, the branchial being 
rather the longest and largest, having six plain cirrhi at the 
orifice; when not fully extended it appears finely corrugated, 
and has two longitudinal bars on the surface; the anal siphon 
curves upwards, the orifice being destitute of cirrhi. The foot 
is very large, flat, long, bevelled to a sharp edge, and lanceo- 
late. There are a pair of branchiz and a pair of palpi on 
each side; the under laminz are by far the largest, long, 
deep, and subquadrangular; the upper ones are not above 
half the size, of suboval shape, and have a lanceolate ter- 
mination, hanging on the posterior portion of the large ones ; 
they are all visibly striated on both surfaces; the palpi are 
long, subtriangular, and very well pectimated. ‘The liver is 
pale green, conjoined with the pale yellow ovarium, which in 
July is full of ova in all states of development. 
This elegant and variously coloured species as to the shell, 
is frequently taken in the dredge in the coral zone m a hving 
state. 
T. TELLINELLA, nobis. 
Psammobia tellinella, Brit. Moll. i. p.277, pl. 19. f. 4; and (animal) 
pl Kina. 
P. florida, Turton. 
Animal elongated, compressed, pure white; mantle open, 
dentated ventrally, and fringed posteriorly from the beaks to 
