A. E. Verrill Decapod Crustacea of Bermuda. 395 



The dactylus has two sharply denticulated dorsal carinae and two 

 strong granulated lateral ribs on the outside, with deep grooves 

 between them. 



The left cheliped is considerably smaller, but otherwise is much 

 like the right, though the dorsal carina of the manns, in this, ends in a 

 prominent angle distally, but not forming a true spine. 



Ambulatory legs are of moderate length, not much flattened, finely 

 fringed. The merus of the swimming feet has the distal posterior 

 end rounded and very finely denticulated, but without a spine. 

 The segments of the male abdomen are crossed by depressed areas, 

 covered with fine scale-like hairs. The male generative organs are 

 thick at base, strongly convergent, then divergent, with slender 

 flexuous tips, which reach a little beyond the middle of the penulti- 

 mate segment. 



The color of the alcoholic specimen is pale orange yellow, with a 

 pair of ill-defined rounded spots of light red on the flanks, and pale 

 red bands on the legs and chelae. The fingers have blackish tips and 

 inner edges ; the dactylus is crossed by a pale band ; the proximal 



half is red above. 



Measurements. 



, Carapace N Front Chelas 



br'dth br'dth bet'wn height 



No. Sex length total spines orbits length spine Locality 



692 F. M. 27 41 36 12 r. 35 r. 12.5 Bermuda 



21 31.2 1.33.5 1.10 Porto Rico 



The type described by Stimpson* was only .20 of an inch in length; 

 total breadth, .31 ; breadth minus spines, .25 ; ratio of length to 

 latter breadth, 1:1.25. 



The second, given in the above table, is that measured by Miss 

 Rathbun, from Porto Rico. The ratio of length to breadth decreases 

 with growth. 



Our specimen, as stated above, differs from the smaller ones. 

 According to Stimpson his had the front more prominent and the 

 two middle teeth Were " smaller and more prominent, and separated 

 from the lateral ones by a rather broad and shallow sinus." This 

 inequality is not so evident in ours. He says there is no notch in 

 the inner orbital tooth. It was present in Miss Rathbun's specimens, 

 and she considers its absence due to immaturity. In Stimpson's 

 type "the inner spine of the carpus is long, reaching to the middle 

 of the palm of the hand." It is much shorter in the Bermuda 

 specimen. Probably this is a character only of the very young. 



* Dr. Stimpson's types of Crustacea were all burned in the great Chicago fire. 

 TRANS. CONN. ACAD., VOL. XIII. 28 .MARCH, 1908. 



