x A MONOGRAPH OF THE 



brownish-orange freckled with dark brown and white. The apex for some distance down is 

 transparent white, and the ovate vesicle of a more opaque white is distinctly seen through it : 

 the papillse are arranged in eight or nine rows of four or five each. Foot transparent white, 

 very broad in front, and extended into short angles at the sides. 



This species comes very near to E. angulata, of which it may possibly prove to be a 

 variety. It differs, however, in colour, and somewhat in the proportions of the parts, parti- 

 cularly in the shortness of the anterior angles of the foot. When it is crawling, the branchiae 

 close so as to cover the whole of the back. The colour and markings resemble a good deal 

 some of the varieties of K papulosa. The species is founded on a single specimen, got at 

 low-water mark, at the Gentlemen's Cove, Torquay, which unfortunately was not preserved ; 

 some doubt may therefore rest on its specific distinction until it can be again examined. 



(26) EOLIS OLIVACEA. 



Additional Habitats. Ardrossan and Saltcoats, Ayrshire ; Lamlash, Isle of Arran ; and Penzance, 

 Cornwall, /. A. Burghead, Geo. Murray, Esq. 



This species appears to be very generally diffused. The Eolis foliata of Forbes and 

 Goodsir, in the 'Report of the British Association' for 1839, we take to be the young of E. 

 olivacea. It was found in Shetland. 



(27) Eolis Cotjchii. 



Eolis Couchii, Cocks, in Naturalist, v. 2, p. 1, pi. 1, fig. 2. 



Body an inch and three quarters or nearly two inches long ; the anterior part to the 

 commencement of the branchiae is white, as is also the tail, the rest of the body is of a bluish- 

 black, with opaque white spots. The dorsal tentacles are rather long and filiform, the oral 

 somewhat shorter and stouter ; both pairs are transparent white with opaque spots. Eyes 

 conspicuous and black. The branchiae are ovate-oblong, transparent white wdth opaque white 

 spots, and are arranged in four distant rows of three papillae each down the sides of the back. 

 The foot is whitish and much attenuated posteriorly. 



We owe the discovery of this fine Eolis to Mr. Cocks, who found it attached to the under 

 side of a stone on the coral bank at Gwyllyn Vase, Falmouth, at the extreme low-water mark 

 of a spring tide in August, 1848. Mr. Cocks kept it alive nearly three months. It was 

 sluggish in its movements and generally held its papillae in a semi-erect position. 



(28) Eolis amohna. 



We dredged several specimens of this beautiful species in Fowey Harbour, Cornwall, 

 in May, 1847. Individuals varied very much in colour, and a little in the length of the 

 tentacles, but the latter always retained the single brown band, and they and the branchiae 

 were always spotted with white or pale yellow. The colour of the papillae varied from yellowish- 

 green to pale yellowish-olive, and occasionally to a pale yellowish-brown. One of the 

 specimens had the bases of the papillae reddish and was blotched with opaque white down 

 the front of each. 



