402 THE OPISTHOBHANCHIATE 



Apltsia hybrida, Soiuerly. Forbes and Hanley, British Mollusca, iii, pp. 



554—556. 

 — DEPILANS, Pennant. Clark, Brit. Mar. Test. Moll., pp. 271, 272. 

 ? — — Linnseus. Blochmann, 1. c, pp. 32, 33. 



? — — LinncBus. Vajssiere, 1. c, pp. 65 — 68. 



Tlie specimens of Aplysia in our collection have been taken as 

 follows : 



I. North of the great Bi^eak water, November, 1886 : two young 

 ones, in trawl. 

 II. Mouth of the river Yealm, July 18th, 1887 : six, large and 

 small, in dredge. 



III. North of the Shagstone, February 2nd, 1888 : one dredged. 



IV. Mouth of the Yealm, October 20th, 1888 : many little ones, 



dredged or trawled. 

 V. North of Batten Breakwater, November 12th, 1888 : nine or 

 ten, all young, in trawl. 

 VI. Estuary of the Yealm, opposite coastguard station. May 25th, 



1889 : a dozen very large specimens. 

 VII. Mouth of the Yealm, September 20tb, 1889 : one small 

 specimen, of pure brown colour with white spots. 

 VIII. Cawsand Bay, October 3rd, 1889 : one, much smaller in size, 

 about f inch long, bright rose-red in colour, with white 

 spots. 

 IX. Duke Rock, May 8th, 1890 : one considerably larger speci- 

 men, of a bright pinkish-red colour, dredged with a 

 quantity of Delesseria sanguinea, of exactly the same 

 colour. 

 X. Middle of Sound, August 14th, 1890 : one very small speci- 

 men, -j^ inch in length, found by Mr. Tate on a stone 

 brought up in the trawl. In this beautiful little indi- 

 vidual the shell was still uncovered, being without any 

 reflexed fold of the mantle. The colour of the animal 

 was almost the amethyst-purple of Alder and Hancock's 

 figure of ^olis Landshiirgii, but deeper and redder. 



In addition to these a few other small or moderate-sized speci- 

 mens (1 — 2 inches) have been taken, but have not been recorded. 

 In the summer of last year several such individuals were generally 

 brought up on weeds at each haul of the trawl along the inside (north) 

 of the great Breakwater, 



All our specimens belong to the second of the two subdivisions 

 of the genus Aplysia defined by Blochmann (1. c, p. 29). The 

 pleuropodia^ {'' epipodia," " parapodia," Schwimmlappen) are fused 



• See uuder Oscanius membranaceus , infra, p. 419. 



