A. E. Verrill Decapod Crustacea of Bermuda. 



I-.", i 



It appears to be nearly allied to Ilapalocarcinus marsupialis Stim IP- 

 SOU,* which forms curious "houses" among the branches of Pocillo- 

 pora ewspitosa. The branches of the coral, in the latter case, grow 

 up around the crab and enclose it, leaving several small apertures 

 for the entrance of water and food, but from which the crab cannot 



emerge. 



In the latter, however, the front of the carapace is flat, not bent 

 downward, and it does not serve for an operculum, which is not 

 needed in its case. 



49 



Figure 49. Troglocarcinus corallicola ; a, dorsal view, x about 4 times, of a ? 

 removed from its den in a coral (Mussa), from Dominical.; b, a smaller 2 

 specimen, x about 4 times, ventral view ; the abdomen, legs, outer max- 

 illipeds, and anteunules are removed, except one basal antennular segment ; 



c, the same, another 2 example ; dorsal view, x 4. Phot. A. H. V. 



( 



It is, perhaps, more closely allied to Cryptochirus coralliodytes 

 Heller,f from the Red Sea and Maldives, which lives in the same 

 manner, in dens in Leptoria ( = Mceandr<i). 



The latter, however, has a differently formed carapace, smooth, 

 convex in front, without marginal spines ; orbits simple, without 

 spines ; and very different maxillipeds. 



* Proc. Boston Soc. Nat. Hist., vol. vi, p. 412, 1859. Caiman, Trans. Linn. 

 Soc. London, ser. 2, vol. viii, p. 43, pi. iii, figs. 29-40, 1900. M. J. Eathbun, 

 Crust. Hawaiian Is., U. S. Fish Com. Bulletin, for 1903, part iii, p. 892, 1906. 



f Heller, Cam., Sitzungsb. Math.-Naturwiss. Classe. Akad. Wissenschaften, 

 Wien, xliii, i, 1861, p. 366, pi. iv, figs. 33-39. 



