378 



REtORT 1867. 



Maceuea. 



Among the Brachyiira we know not of any that call for especial remark, 

 except Planes linmcana, of which Mr. Couch says, " In the sjjring of the 

 present year (1867) an example of the Hawk's-bill Turtle was taken in the 

 Channel, at not a great distance from the French coast, and therefore not to 

 be classed as British ; but when brought alive and active to Polperro, there 

 were found, adliering closely under the shelter of its tail, two full-grown 

 examples of the Crab Flanes linnceana, — the situation evidently chosen for 

 support and shelter ; for, from the structure of their hind legs, it does not 

 appear probable that they can maintain themselves at the surface without 

 the aid of some extraneous support." 



These would not have been recorded here if the species had not pre- 

 viously been taken on onr coast ; for there can be little doubt that they arc 

 mere strangers ; and the specimens having been taken attached to a living 

 turtle corroborates the fact, while it also shows that the exotic reptile must 

 have gathered them as it travelled by the Sargossa weed. 



Amongst the anomurous Crustacea we would wish to notice the genus that 

 Leach has named Mnnida in order to distinguish it from that of Gcdatliea ; 

 but the points of distinction are not sufficient to warrant so great a separation, 

 and naturally they aj^pear to us to be but species of one genus. 



