APPENDIX. 291 



Through the kindness of Mr. Albanj"^ Hancock we are enabled 

 to give representations of this rare and interesting addition to 

 the British fauna. The first British specimen was dredged oiF 

 the Shetland Islands by Mr. Barlee in 1849. A second example 

 has been taken by the Rev. R. C. Abbes, from the boats at Whit- 

 burn, which place is in the county of Durham, not in Northum- 

 berland, as we have on several occasions stated in the preceding 

 pages. The animal found by Mr. Barlee measured less than one 

 inch in length. It has been carefully compared by Mr. Hancock 

 with specimens of the true D. lineata, and found to be identical. 



Philippi describes the Mediterranean animal as having the 

 body rounded in front, narrowed behind the middle, and acumi- 

 nated at the posterior extremity. The foot is similarly shaped 

 and fleshy ; it exhibits a distinct glandular space behind. Under 

 the edge of the mantle are numerous lamelliform fuscous branchiae. 

 The capital veil is fleshy and tinged with crimson. Between it 

 and the foot is the longitudinal orifice of the mouth, surrounded 

 by plicated lips. Between the veil and the mantle there is a 

 conical fleshy process, with minute clavate tentacles lodged in 

 deep grooves, and never protruded by the living animal. 



In the " Synopsis of the Mollusca of Great Britain," pub- 

 lished in 1852, from the manuscripts of Dr. Leach, there occurs 

 at p. 365, the following account of a mollusk, which has not 

 been noticed by ourselves or any other recent observers in the 

 British seas, but of the authenticity of whose presence we enter- 

 tain not the slightest doubt. 



CLIO, Lamarck. 



" The body is naked, gelatinous, oblong turbinated, and formed 

 for swimming. The head is exserted, laden with many minute re. 

 tractile tentacles, arranged into two bundles. Two eyes are situ- 

 ated on the upper part of the head. The mouth is terminal. Two 

 branchial oblong-ovate fins are situated opposite each other on the 

 sides of the neck. The aperture named the anus, and that of the 



