432 A. E. Verrill — Decapod Crustacea of Bermuda. 



upper one smaller, obtuse; the two outer ones prominent, subacute. 

 The manus is carinate above, with 4 or 5 small granule-like denticles 

 on the edge; the thumb and dactylus are strongly excavated at tip 

 and bear 5 or 6 serrate teeth, on the outer edge, the distal ones 

 largest. The last two legs are sharply subchelate at tips, the last 

 most perfectly so. 



Figure 51. — Dromidia antillensis, under side, x about li2- Pbot. A. H. V. 



Color, in alcohol, white under the yellowish pubescence; chelae 

 with light red or flesh-colored, partly naked fingers, white at the tips. 



It always protects itself by means of a living sponge (sometimes 

 a compound ascidian) held over its back by the posterior two pairs 

 of legs. The carapace is about as long as broad. 



Measurements of Carapace for variations of Ratios. 



The first four series of measurements are by Prof. S. I. Smith. 



In No. 831b, the chelfe are relatively much larger than in the 

 Bermuda example, probably owing to its maturity ; length of chela, 

 12,5"""^; height, 6.5""^; the manus has a row of four conspicuous 

 denticles on upper edge, proximally ; the edges of the digits are 

 strongly and coarsely toothed. The carpus has three conspicuous 

 distal tuberculiform teeth. The lateral teeth of the carapace are 

 conspicuous, the two anterior ones the larger and less acute; on the 

 left side the 2d tooth is double. The preorbital and suborbital teeth 

 are about as larsfe as the lateral. 



