Decapod Crustacea of Bermuda, Part II. 75 



times the breadth ; ventral notch is abrupt and large ; dactyl is 

 strongly curved, evenly convex and hairy dorsally. (See pi. 20, 

 fig. 46.) 



The second legs are long ; they reach beyond the rostrum by 

 the parts beyond the middle of the merus. Legs of the third and 

 fourth pairs are not large and compressed and have about seven 

 pairs of spines on the under side of the propodus, larger and 

 fewer than those of hcterochalis ; legs of fifth pair have a large 

 brush of fine hairs ; the dactyl is slender, incurved, and excavate 

 on the inside. The spine on the ischium of the third and fourth 

 legs is lacking or minute. 



The telson is more narrowed distally than in A. hcterochfclis, 

 and the apical spines are longer, especially the outer ones, which 

 are about half as long as the inner. The uropods have two spini- 

 form denticles and a sharp articulated spine on the outer angle 

 of the second segment. The dorsal margin, especially of the 

 inner lamella, has a submarginal series of minute, acute spinules, 

 and a dense marginal row of long plumose hairs intermingled with 

 long slender setiform hairs. See pi. 27, fig. is. 



Body with a dark gray, or brown ground-color, darker on the 

 abdomen, crossed by about nine conspicuous, more or less lunate 

 or elliptical spots or semibands of translucent white, about equal 

 in width to the intervening dark bands. Three white bands are 

 on the carapace, the third at its posterior margin ; six are on the 

 abdomen, the first blending with the last of those on the carapace ; 

 those on the abdomen are usually whiter and more clearly defined 

 than the others. The one on the gastric area of the carapace is 

 usually bilobed ; the one on the middle is often W-shaped ; the third, 

 narrow elliptical. On the abdomen the ground-color is often dark 

 green or almost blackish green, and the light spots may be bordered 

 by a line of orange. A broad band usually crosses the uropods 

 and telson, which are, in some individuals, edged with an orange 

 line. Chelae with a pale ground-color, thickly specked with dark 

 gray ; two or three whitish bands cross the upper surface ; the 

 tips are pale salmon or whitish. Antennal peduncle grayish; 

 flagella and ambulatory legs orange-yellow, annulated with white. 



At Bermuda this is a common species, especially on the reefs, 

 where it lives in holes in dead corals and limestone rocks. It was 

 the largest species found by us. Some of our museum specimens 

 were labelled as hetcrochalis by Professor Kingsley. 



