A. E. Verrill — Decapod Crustacea of Bermuda. 427 



ai'e all similar, short, with short, sharp, hooked claws, for strong 

 adhesion. The posterior ones are not ai'ticnlated much higher up 

 than the others. 



Family HAPALOCARCINIDiE. 

 Troglocarcinus, geu. nov. 



This generic name is proposed for a curious crustacean that 

 inhabits holes and dens in the growing surface of living corals. 



It is evident!}^ closely related to the Hapalocarcinus marsupialis 

 Stimpson of the Hawaiian Islands, which occupies gall-like nests 

 between the living branches of Foeillopora. As in the latter, the 

 abdomen of the female forms a capacious egg-pouch. 



It differs in having the front of the carapace abruptly bent down- 

 ward and operculum-like ; in having the antero-lateral margin and 

 front denticulate; in the form of the maxillipeds; and in several 

 other characters. The eyes are not retractile ; orbits feebly devel- 

 oped ; a spine on the outer margin. 



Troglocarcinus corallicola, sp. nov. 



Figures 48, 49, a, 6, c. Plate XXVIII, Figure 8. 



Carapace oblong, transversely convex ; the sides nearly parallel 

 posteriorly ; front abruptly bent downward and covered with small, 

 une'|ual, sharp spinules and hairs to which dirt, etc., firmly adheres ; 

 front edge minutely notched in the middle and finely spinulated ; 

 antero-lateral margin with a row of fine sharp spinules ; upper 

 surface, back of the frontal bend, hairy and granulated, the granules 

 larger anteriorly and toward the sides; minute posteriorly. The 

 sloping anterior part of the carapace has a concave area, each side 

 of the median line. The antero-marginal spines decrease in size 

 backward ; the one at the exterior edge of the orbit is largest. The 

 carapace is much higher or thicker in front, especially at the bend, 

 than posteriorly. Sternum smooth, concave in the middle ; genital 

 openings of $ lunate, near together on the sternum. 



Chelipeds small, in the female smaller than the first ambulatory 

 legs ; in the male about as stout, but not longer, hairy ; chela? small, 

 with simple, acute digits. Ambulatory legs hairy, short, incurved, 

 with simple, sharp, incurved claws ; posterior legs becoming shorter, 

 but similar to the others, articulated slightly higher up. 



Eyes small on thick, short stalks; orbits looking forward. Pedicels 

 of antennulae large, longer than the eye-stalks, rather stout, near 

 together, spinulose distally, with about three longer terminal spinules. 



Trans. Conn. Acad., Vol. XIII. 30 March, 1908. 



