MARINE CRUSTACEANS. 241 



Subfamily Menippinae. 



Genus Pseudoziiis Dana, 1851. 



1. Pseudozius dispar Dana, 1852. 



Pseudozius dispar, Caiman, Tr. Linn. Soc. (2) viii. p. 14 (1900)i. 



The granular field on the larger hand of the male of this species grows relatively smaller 

 with age. 



Taken on the reef in Male, Goifurfehendu and Fadifolu Atolls, and in Funadu Vein, 

 Miladumadulu Atoll. 



2. Pseudozius caystrus (Ad. and Wh.), 1848. Alcock, ill. p. 181. 



This very common species, which is recorded by Alcock from the Laccadives, almost 

 certainly occurs at Minikoi, though unfortunately no specimens of it have reached England-. 



b 



Fig. 43. Limbs of Pseudozius coralliophilnx; a. outside of greater haud, l>. walking leg, c, d. end of the same enlarged. 



3. Pseudozius coralliophilus, n. sp. (Fig. 43). 



Diagnosis : " A Pseudoziiis with the carapace finely granular, bearing a few scattered hairs, 

 the regions faintly marked out ; the front sloping gradually downwards, cleft into two low, 

 rounded lobes, the fuiTow between the front and the orbit ending on a small lobe ; the antero- 

 lateral edge with three very low humj)s, from the last of which a fine ridge runs inwards 

 on the back; the chelipeds unequal, finely granular, their fingers widely gaping, especially on 

 the large hand, furrowed and subcylindrical, with a few isolated blunt teeth, the arm and 

 wrist (meropodite and carpopodite of the cheliped) without spines, the fore edge of the arm 

 finely toothed ; and the walking legs fairly stout, with a long end-claw. " 



Length : 3 mm. Breadth : 4 mm. Colour in spirit : cream, with pale brown, cream-tipped 

 fingers. 



A single male specimen was taken from a block of the brain-coral Leptoria tenuis growing 

 in the lagoon at Minikoi. It was sheltering at the bottom of one of the holes in the coral 

 made by another little crab — Cryptochirus coralliodytes^. Whether the first owner of the hole 

 had died, or left willingly, or had been ousted by the Pseudozius there was nothing to show, 

 nor can we tell as yet whether the latter lives always in Cryptochiru,s-h.o\es or had merely 

 retreated into one in this case as the water drained off the surface of the coral. In another 

 of these holes there was found a female Pseudozius, sheltering in the same way, and it was 



^ Wbere synonyms will be found. For the principle on - See footnote to p. 191 of Part II. of this publication, 



which references are given in this paper see p. 192 of Part II. '' See below, p. 271. 



of the present publication. 



31—2 



