CRUSTACEA WHITELEGGE. 139 



METOPOGRAPSUS MESSOR, ForsJc. 

 Metopograpsus messor (Forsk.), M. Edw., Ana. Sci. Nat. (3), 



xix., p. 165. 

 Three small males. 



GRAPSUS MACULATUS, Catesby. 



Grapsus maculatus (Catesby), M. Edw., Ann. Sci. Nat. (3), 

 xx., p. 167, pi. vi., fig. 1. 



Four adult females. 



One of the specimens has both the distal extremities of the 

 merus joints of the last pair of legs denticulate. Very common 

 amongst the rocks about high-tide mark on the outer reef, but 

 never observed in the calmer waters of the lagoon. 



GEOGRAPSUS CRINIPES, Dana. 



Geoyrapsus crinipes, Dana, Crust. U.S. Explor. Exped., i., p. 341, 

 pi. xxi., fig. 6. 



Two adult females. 



The bases of the second and third ambulatory legs are furnished 

 with fringes of hairs, as in Ocypoda, but they are longer and 

 much finer than those usually found in members of that genus. 

 Mr. C. Hedley informs me that the specimens occurred in associa- 

 tion with Cenobita and Cardisoma, at a distance from the sea, 

 among broken coral blocks shaded by palms and other vegetation. 

 This appears to be a highly interesting instance of adaptation to 

 terrestrial conditions, not only as to breathing by means of the 

 hair-clothed apertures between the bases of the second and third 

 pairs of legs, but also in colour which is a dirty yellowish-white, 

 and seems well suited to harmonize with the tint of the coral 

 fragments amongst which it lives. The left chelipede is slightly 

 the larger, the fingers when closed have a large gap at the base, 

 the fingers of the smaller hand almost meet throughout when 

 closed. 



LEIOLOPHUS PLANISSIMUS, Herbst. 



Leiolophus planissimus (Herbst.), Miers, Ann. fe Mag. Nat. 

 Hist. (5), i., p. 153. 



Two specimens one male and one female. 



This species occurred under stones in company with Petrolisthes 

 dentatus, at low water mark. 



Tribe OXYSTOMATA. 

 CALAPPA HEPATICA, Linn. 



Calappa hepatica, Linn., Syst. Nat. ed. xii., p. 1048, 1766. 

 One adult female. 



