PHOLAS. 177 
covered with a thick red-brown epidermis, which is aspersed 
with thick-set sand-like red eminences, or minute papille, that 
become larger and more intense at the termini of the orifices, 
where its margin is irregularly encircled with a fine light 
brown fringe or rather pile; within the periphery of this 
frmge are the siphonal apertures, the branchial one being 
rather the longest, without cirrhi, but smuated or escalloped, 
and marked with a dozen brown and white alternate lines 
running into the tube; these at half-contraction have the 
appearance of short blunt cirrhi, occasioned by the doubling 
of the brown and white points of the scallops, the two nearest 
the anal tube being the longest in appearance, with a single 
one exactly opposite the two; these however are only de- 
ceptions, and vanish entirely when the tube is fully expanded ; 
the anal cylinder is pale brown and perfectly simple; both 
siphons are destitute of ciha, having only the margins of the 
sheath finely pilose; none of the other Pholades are without 
eirrhi on the branchial orifice. The foot, when at rest, is 
nearly an oval, but in action it becomes pomted behind and 
rounded in front; it is truncate at the base, and fixed to the 
body by a long round cylindrical fleshy pedicle of a pale 
bluish-white colour. The branchiz and the palpi on each 
side are so nearly similar to those of P. dactylus as to require 
no observation ; the siphonal sheath when extended is double 
the length of the shell. The liver is darker than in the last 
species. 
P. canpipa, Linneus. 
P. candida, Brit. Moll. i. p. 117, pl. 4. f. 1, 2. 
Animal conically elongated from the anterior end to the 
posterior axis of the cone. The body, sheath and mantle are 
a pale red-brown, but when divested of the epidermis, of the 
palest hyaline tinged with brown. The mantle as usual is 
closed, except the aperture for the foot, and being produced 
into a sheath that is proportionately shorter than im its con- 
geners; the siphons are of the same length, and both are 
cirrhated at their orifices,—the only example in this respect 
that we know of amongst the Pholades; the branchial with 
N 
