2GO MARINE ZOOLOGY OF ARRAX. 



both parties the arrangement works. Of course the Adamsia, 

 without any fatigue or effort, is carried by the roaming 

 propensities of the crab over a large district; and, in this 

 way, he commands an extensive market for the acquisition 

 of food; whereas the Actiniae, being fixed to rocks or half 

 buried in the sands, must either undertake a slow and 

 wearisome journey, by their own unassisted labour, or be 

 satisfied with the supplies brought by the wind or tide 

 within reach of their feelers. The hermit, on the other hand, 

 is also recompensed ; for, as the writer of these notices has 

 frequently observed, the palatable morsels secured by the 

 tentacles of the zoophyte are instantly seized by the claws of 

 his crustacean companion, and, without any apparent apology 

 or subsequent remorse, are partly appropriated to his own 

 immediate use. " In all likelihood," says the late Rev. Dr. 

 Landsborough, " they in various ways aid each other. The 

 hermit has strong claws, and while he is feasting on the prey 

 he has caught, many spare crumbs may fall to the share of 

 his gentle-looking companion. But soft and gentle-looking 

 though the Actinia be, she has a hundred hands, and woe 

 to the wandering wight who comes within the reach of one 

 of them ; for all the others are instantly brought to its aid, 

 and the hermit may soon find that he is more than com- 

 pensated for the crumbs that fell from his own booty." * 

 Specimens of this curious and beautiful zoophyte may occa- 

 sionally be procured by a search in the zostera beds at 

 Lamlash, or in other places at low water. Dr. Lands- 

 borough first saw it at the mouth of the Glen Rosa burn, in 

 Brodick Bay. 



113. We must now inquire about the prawn captured at 

 Corriegills. Look at it through the sides of the glass vessel. 

 The creature is almost transparent. This is Palcemon 

 gquUla; it is smaller than the common prawn, Palcemon 

 serratus, and differs in a few other points from that species. 

 It is readily found in the rock pools on Holy Island, on both 



* Landsborough, Popular History of British Zoophytes, p. 230. 



