ii . A MONOGRAPH OF THE 



rather stout; but in this species five or six of the extreme lateral spines are minutely pectinated, 

 which is not the case in D. tuberculata, nor in D. Johnstoni, though in the latter the spines are 

 also of two kinds. 



(3) Doris repanda. 



Doris lavis, Flein., Brit. Anim., p. 282. 



obvelata, Loven, Ind. Moll. Scand., p. 4. 



We have been favoured by Dr. Fleming with the examination of an original specimen of 

 his D. lavis preserved in spirits, from which we can say with certainty that it is synonymous 

 with our D. repanda. The D. lavis of Miiller is a very distinct species, of which we have also 

 had the opportunity of examining a specimen, by the favour of Dr. Loven. The latter species 

 has not yet been found in Britain, though it is not improbable that it may inhabit our Northern 

 shores. Dr. Loven considers that our D. repanda is the D. obvelata of Miiller, which may 

 possibly be the case, but his description and figure are not sufficiently accurate to enable us 

 to determine this. His figure represents the tubercles larger than in our species, and the cloak 

 differently coloured, and it wants the characteristic opaque white or sulphur-coloured -spots 

 along the sides. 



(4) DORIS MURICATA. 



Mr. Thompson, of Belfast, records the discovery of this species in Ireland, in the 'Annals 

 of Natural History/ v. 5, p. 86. He there says, — " I have not unfrequently taken this minute 

 species when (accompanied by Mr. Hyndman) dredging in the Loughs of Strangford and 

 Belfast; it was generally adhering to the leaves of tangle {Laminaria digitatd). Miiller 

 describes it as 5 lines long by 3 broad: my specimens were all even under that size. 

 The D. muricata has hitherto been unnoticed in the British seas." Mr. Thompson afterwards 

 kindly sent us specimens in spirits. In that state they resembled very much our D. aspera, 

 but appeared to have the tubercles rather larger and the cloak a little more rounded. So 

 much, however, depends upon the state of contraction and other circumstances, that it is 

 difficult to give an opinion on critical points from spirit-specimens. The liver, as seen through 

 the foot, appears much larger than in D. aspera, and in this respect comes nearer to 

 D. proxima, but the tongue shows that it is more nearly related to the former than to the 

 latter. 



(5) DORIS U.LIDIANA. 



Doris Ulidiana, Thomp., in Ann. Nat. Hist., v. 15, p. 312. 



"Length from spirits \ inch, breadth I inch; ovate-oblong, rather straight at the 

 sides, depressed, of a uniform pale yellow, the intestines appearing through the skin of a dark 

 colour. Cloak not extending much beyond the foot, rough with spicula, and covered with large, 

 unequal, obtuse tubercles ; the spicula collected in bundles in the tubercles and radiating at 

 their base. Tentacula long and whitish, lamellated, without sheaths; the edges of the 

 apertures plain. Branchiae consisting of eleven beautifully white pinnated plumes, set in a 

 semicircle round the anus. Foot rather broad. Veil above the mouth semicircular." 



