MYSIS. 143 



bone," and swimming about them freely, seem to enter the 

 gullet as it were of their own accord. 



Its swimming-feet are in continual motion, the walking 

 feet remaining fixed; it moves along with its body in a 

 horizontal line, but occasionally jumps like a little Shrimp. 



Mysts CHAMiELEON, Bell. — Middle plate of the tail bi- 

 furcate; beak blunt, not more than one-third the length of 

 the eye-stalk. 



Abundant on our coasts, as at Weymouth (Professor 

 Bell) ; Moray Firth (Rev. G. Gordon) ; Firth of Forth, 

 Cumbrae, Lamlash Bay, rock-pools. Channel Islands (Rev. 

 A. Norman). 



It varies much in colour, from grey to green and brown ; 

 and according to Mr. Norman, is " certainly by far the most 

 common species of the genus." 



Mysis Lamorn^e, Couch.* — Beak bluntly triangular; 

 middle plate of tail deeply bifurcate, and about half as long 

 as the second ; antennal scale reaching beyond the peduncle 

 of inner antennae. Small and stout species, generally of a 

 deep arterial blood-colour ; a very light and active species. 



Mount's Bay. 



Mysis vulgaris, J. Y. Thompson. — Middle plate of 

 * Zoologist, Oct. 1856, p. 5286. 



