122 A. E. Verrill — Species of Grapsoid Crustacean . 



1866 (perhaps collected as early as 1855), by J. Matthew Jones, 

 Esq., who resided in Bermuda for many years, during the 

 colder seasons, and whose first book on Bermuda was published 

 in 1859. 



It is certain that all the more terrestrial and arboreal species 

 of this genus must have been derived originally from aquatic 

 species, much in the same way that this form has been devel- 

 oped. Several of those now regarded as distinct species on 

 the American mainland and in the West Indies may even 

 have descended from S. JRicordi or some very similar species. 

 Thus 8. cinerea of our southern coasts is very closely related 

 to S. Sicordi. with which it has often been confounded and 

 from which it cannot always be distinguished, unless by 

 experts. 



