186 THE RUNCINA. 



gliding movement of the base, and was not particu- 

 larly slow. Indeed, I can state distinctly that 

 diantlius crawls as freely as any other species.* 



The rank odour noticed in A, 2^<^'^asittca is very 

 powerful and enduring in this species also, as it is in 

 A, crassicornis. 



The principal object in the accompanying Plate, is 

 an expanded specimen of the Plumose Anemone [Ac- 

 tinia diantlius) of the wliite variety, attached to an 

 oyster-shell. In the front is a group of Serpula con- 

 tortupUcata, with tlieir cork-like opercula protruded, 

 and their scarlet fans expanded. They are seated on 

 a Scallop [Pecten ojpercularis) ; from which also springs 

 a frond of the exquisitely delicate Nitophyllum punc- 

 tatum. Behind the Anemone are some tufts of the 

 Sea-grass {Zoster a marina), 



EUNCINA HANCOCKI. 



On the 17th of September, I took this little MoUusk 

 by hundreds on the Zostera left dry at low spring-tide, 

 below Sandsfoot Castle. In raking the edges of the 

 gTass in the shallow pools with a ring-net, the little 

 black, shining Nudibranchs were left on the cloth. 

 Some were of much larger size than mentioned by 

 Forbes and Hanley, being fully a quarter of an inch 

 long when crawling,f while others were of various 



* This fact has now been abundantly confirmed, not only by my 

 own experience, but by that of many who at this time (1856), in 

 London and elsewhere, are keeping cUanthus in aquaria. {Second 

 Edition.) 



+ I lately found in one of my tanks at London, a specimen of 

 Runcina Uancocki, which was four lines in length when crawling, 

 and stout in proportion. {Second Edition.) 



