A. /-'. \'<n-ill Decapod Crustacea of Bermuda. 



segment much narrower, showing the sternal plates. Coxre of fifth 

 pair of feet not in contact with anchylosed segment. 



Carpi, chelipeds, ami bases of the dactyls finely granulate; carpal 

 depression well defined along the margin, and extending around to 

 the tooth on the inner angle. Large eheliped very deep and rather 

 thick ; fingers light brown ; in some specimens white. Ambulatory 

 feet slender; dactyls very slender and hairy. (Bened. and Rathbun, 

 abridged.) 



The larger specimens and many of the smaller ones have the areo- 

 lations of the carapace very conspicuous, and the transverse ridges 

 are high and sharply cut or nearly perpendicular on the anterior side, 

 with the crest granulated ; but in some specimens the ridges are 

 obtuse with the front side sloping. The dorsal side of the carpus of 

 the cliche, especially of the smaller one, is grooved and roughened 

 and often bears two or three rounded tubercles. The dactylus is 

 strangely grooved above, or slightly bicarinate. 



Measurements of Bermuda specimens. 



Front 



Carapace between Chelse 



No. Sex length breadth orbits length height 



4017o 9 12 5.5 r. 10.5 5.5 



4617k $ 8 10.5 5 r. 7.5 4.5 



8 11 4.5 



$> 6.5 8.5 4 6.5 3.5 



Variety sculptus, uov. Plate xvi, figure 3. 



The strongly sculptured specimens differ so much in appearance 

 from the smoother ones that they might easily be mistaken for a 

 distinct species, especially as they usually have also stronger mar- 

 ginal teeth, and the carpi of the chelipeds are rougher with about 

 three small rounded tubercles, which are lacking in the smoother 

 form. 



The coalesced post-orbital tooth is often distinctly divided into 

 two subequal denticles by a rounded notch ; in others the notch is 

 very shallow, while in some it is lacking so that the whole forms a 

 rounded or subtruncate lobe. I have, however, found these extreme 

 variations on the opposite sides of a single individual. 



This little species is very common at Bermuda, under stones at 

 low-tide and in shallow water divdgings. It is often associated with 

 the voting of Leptodius floridanus, of the same si/es, which it 

 often closelv resembles, in form, in the areolations, and in the mar- 



