150 THE BERMUDA ISLANDS. 



We observed a number of specimens of the large Bermuda 

 crayfish, but unfortunately obtained none. I am unable, 

 therefore, to state positively if the species is correctly referred, 

 but in all probability' it is the same as the common West 

 Indian form. 



ScyllaruB scalptus, Milne-Edwards. 



One specimen, purchased at the Crawl, which agrees with 

 , Milne-Edwards' description {Hist. Nat. des OrusL, ii, p. 283) aiid 

 Lamarck's illustration in the Encydopidie, pi. 320. The 

 localitj'^ of the original specimen appears to have been un- 

 known, nor have I been able to obtain data regarding this 

 species from any of the later writers, by many of whom it is 

 entirely ignored. 



Alpheus avarus, Fabr. 



A. Edwardsii, Audouin. 



A. Bermudensis, Spence Bate. 



A series of some twenty specimens collected at the same 

 locality shows considerable variety of form. The smaller 

 specimens are evidently the A. Bermudensis of the Challenger 

 Reports, while the larger ones, agreeing with these in the 

 structure of the head, etc., more nearly approximate in the 

 configuration of the hand A. avarus and A. Edwardsii, the 

 former a common Old World species, and the latter, a species 

 described from the Cape Verde Islands. Our series contains 

 what might be considered undoubted representatives of all 

 three (so-called) species, showing all the gradations that unite, 

 or separate the forms from one another. Hence, I am con- 

 strained to look upon them as mere varietal forms of a single 

 species, the Alpheus avarus of Fabricius. The older the speci- 

 mens, the more deeply grooved is in most cases the hand. 



Alpheus minus, Say. 



A number of species taken from sponges and tunicates 

 collected in Harrington Sound. All the individuals were of 

 small size, measuring rather less than an inch in length, 

 although the females were abundantly provided with eggs. 



Alpheus formosus, Qibb«s, 



