ORCHESTJA DESHAYESII. 37 



finger : palm occupying nearly the whole of the inferior 

 margin, with a large tooth at the inferior angle, against 

 which the extremity of the curved finger impinges when 

 closed. The coxa of the fifth pair of legs is bilobed, 

 but is not quite so deep as the coxa of the preceding pair. 

 Fifth pair of legs shorter than the sixth and seventh. 



This species was first taken by Savigny in Egypt, when 

 he visited that country with the first Napoleon. A spe- 

 cimen in the British Museum was taken on the British 

 coast. One in the Museum at the Athenaeum, Plymouth, 

 was taken by the late Dr. Edward Moore, under Mount 

 Batten, in Plymouth Harbour. An English specimen of 

 an unknown locality has been for many years in Mr. West- 

 wood's collection, and Professor Kinahan, who states that 

 it is local and rare, has sent us specimens from Carrick- 

 fergus. In its general form it is less compressed than 

 O. littorea. The widely separated recorded habitats in- 

 duces us to believe that, like O. mediterranea, it has 

 hitherto been overlooked, a fact that has been too common 

 in this order of Crustacea. 



The accompanying vignette of Mount Batten is from 

 the pencil of our friend Mr. Philip Mitchell, of the New 

 Water Colour Society. 



