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remarkable range from the West Indies and Brazil, through the Mediterranean 

 and its Atlantic approaches, to Japan and S. E. Australia. 



One extremely doubtful species (P. fasciatus) has been reported, but 

 only once, from Falmouth in the English Channel, — this, as far as I can 

 ascertain, being the only true Pagurus found at a great distance from the 

 tropics. 



Though several species of Pagurus range into depths of 20 to 50 

 fathoms, the only one that truly belongs to the sublittoral fauna is P. arrosor 

 which may go down to close upon 200 fathoms, a fact which adds some 

 significance to its remarkable geographical distribution, 



/^ey to the Indian species of the genus Pagurus. 



I. The eyestalks reach very nearly to, or even surpass, the end of the 

 antennular peduncles : the eyes never occupy as much as one- 

 third of the terminal joint of the eyestalk : — 



A. The greatest breadth of the carapace across the branchial regions 



is less than the length of the carapace in the middle line : — 



i. Left cheliped vastly larger and longer than the right : — 



o. The whole of the outer surface of the left hand is 

 spinose : — 



a. Outer surface of propodite of third left leg spinose ; — 



a" , Chelipeds and legs very hairy : hand of left 

 cheliped not inclined inwards : — 



X. Carapace and legs copiously ocellated _ P. punctulatus. 



y. Carapace and legs not ocellated _ P. vulneram. 



h". Chelipeds and legs bare, or sparsely setose ; 

 hand of left cheliped strongly inclined 

 inwards ... ... ... ... P. wood-masom. 



b' . Outer surface of propodite and dactylus of third 

 left leg with regular, transverse squamiform 

 markings ... ... . ...P. setifer. 



b. Except for a few spinules along its upper margin the 



outer surface of the left hand is granulous ... P. fabimarms. 



ii. Left cheliped decidedly larger but not much longer than 

 the right: the joints of the distal half of the antennal 

 flagellum strongly gibbous ; (chelipeds and legs hairy and 

 spinose) .^ _ „. ... ... P. euopsis. 



B. The greatest breadth of the carapace across the branchial 



regions is equal to the length of the carapace in the middle 

 line : left cheliped moderately larger than the right : (cheli- 

 peds and legs hairy : outer surface of last two joints of third 

 left leg transversely striated) _ .. ... P. guttatus. p.Sf. 



