m 
MOLLUSCA. BRANCHIFERA. Aplysia, 
m-t- Marginal hand striated, and like hair-cloth, 
162. C. Icevis. — Valves smooth, with distinct lines of growth. 
Mont. Test. Brit. 2. Flem. Edin. Encyc. vii. 102. Lowe, Zool. Joum. ii. 
97 . — On stones, not common. 
Length rarely half an inch ; breadth about a quarter, reddish, mottled 
with white. Valves arched, slightly beaked, raised at the sides ; when highly 
magnified, they appear minutely punctured ; border broad, striped brown and 
white, the margin with a short fringe. — A specimen found by Captain Cart 
michael at Appin, is 1 inch and y%ths in length. Montagu mentions a va- 
riety with seven valves, which he has termed Chiton septemmlvis. 
163. C. alhus. — Valves minutely punctured, the first very 
large. 
Linn. Syst. Nat. i. 1107. Fab* Faun. Gr. 422. Mont. Test. Brit. 4. 
Flem. Edin. Encyc. viii. 103. — On hills, rare. 
Length |ths, breadth |th of an inch, narrow, white. Valves short in pro- 
portion to their breadth, considerably elevated in the middle, slightly beak- 
ed ; the lines of growth distinct on the sides. Border narrow, margin near- 
ly entire. 
Marginal hand smooth. 
164 C. IcBvigatus. — Valves regularly shagreened, the lines 
of growth distinct. 
Flem. Edin. Encyc. vii. 103. — C. latus, Loive, Zool. Journ. ii. 103. t. v. 
f. 6, 7. — Under stones, but not common. 
Length nearly an inch, breadth about half an inch, colour rufous, mottled 
with brown and white ; the colouring of the front valve frequently disposed 
in transverse zigzag lines, which is the case, but less distinctly, in the other 
parts of the surface. Valves high in the middle, slightly beaked; diagonal 
fold elevated ; border smooth, with a nearly entire margin — This species I 
have found plentiful in Zetland, and on the shores of Lochbroom : Captain 
Carmichael and Mr Lowe have likewise found it on the coast of Argyle. 
The references of the preceding species to the Testacea Britannica, cited 
above, may be relied on, in consequence of interchange of specimens 
between the late Mr Montagu and the author. 
% 
Gen. XLIV. APLYSIA. — Teutacula four ; brancliise lateral ; 
lid corneous. 
165. A. depilans. — Body of a purplish colour, with black 
dots. 
Linn. Syst. Nat. i. 1082. Penn. Brit. Zool. iv. 42. t. xxi. f. 21 — A. hy- 
bridal Sower. Brit. Muse. t. liii. — A. depilans and mustilina, Peww. Brit. 
Zool. ii. ed. iv. 79 ^Not uncommon among sea-weeds a little beyond 
low water-mark. 
Length from five to six inches and upwards ; ovate, with a produced neck ; 
foot narrow ; head slightly emarginate, with a tentaculum on each side ; in front 
of the superior tentacula on the neck are two black points or eyes ; branchiae 
