History of British animals - University of Guam Marine Laboratory

290 MOLLUSCA. BRANCHIFERA. Aplysia.*** Marginal band 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. Journ. ii.97 On stones, not common.Length rarely half an inch ; breadth about a quarter, reddish, mottledwith white. Valves arched, slightly beaked, raised at the sides ;when highlymagnified, they appear minutely punctured ;border broad, striped brown andwhite, the margin with a short fringe—A specimen found by Captain Carmichaelat Appin, is 1 inch and T 2 „ths in length. Montagu mentions a varietywith seven valves, which he has termed Chiton septemvalvis.163. C. alius.— Valves minutely punctured, the first verylarge.Linn. Syst. Nat. i. 1107- Fab. Faun. Gr. 422. Mont. Test. Brit. 4.Flem. Edin. Encyc. viii. 103.—On hills, rare.Length fths, breadth ith of an inch, narrow, white. Valves short in proportionto their breadth, considerably elevated in the middle, slightly beaked; the lines of growth distinct on the sides. Border narrow, margin nearlyentire.**** Marginal band smooth.164. C. laevigatas.— Valves regularly shagreened, the linesof growth distinct.Flem. Edin. Encyc vii. 103. — C. latus, Lowe, Zool. Journ. ii. 103. t. v.f. G, 7-—Under stones, but not common.Length nearly an inch, breadth about half an inch, colour rufous, mottledwith brown and white; the colouring of the front valve frequently disposedin transverse zigzag lines, which is the case, but less distinctly, in the otherparts of the surface. Valves high in the middle, slightly beaked ;diagonalfold elevated ; border smooth, with a nearly margin.— entire This species Ihave found plentiful in Zetland, and on the shores of Lochbroom :CaptainCarmichael and Mr Lowe have likewise found it on the coast of Argyle.The references of the preceding species to the Tcstacea Britannica, citedabove, may be relied on, in consequence of interchange of specimensbetween the late Mr Montagu and the author.Gen. XLI V. APLYSIA.— Tentacula four ; branchia? lateral ;dots.lid corneous.165. A. dep'dans.— Body of a purplish colour, with blackLinn. Syst. Nat. i. 1082. Penn. Brit. Zool. iv. 42. t. xxi. f. 21—A. hybridalSower. Brit. Muse. t. liii—A. depilans and mustilina, Penn. Brit.Zool. ii. ed. iv. 79 Not uncommon among sea-weeds a little beyondlow 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 frontof the superior tentacula on the neck are two black points or eyes branchiae;