( 92 ) 



12. Pagurus imbricatus, Edw. Plate IX., fig, 8. 

 Pagurus imbncattis, Milne Edwards, Ann. Sci. Nat., Zool., (3) X. 1848, p. 61 : Miers, Cat. 

 Crust. New Zealand, p. 66, 1876; and Zool. H. M. S. Alert, pp. 185, 264, 1884 : Filhol. Crust. 

 Nouv. Zel. Miss. Tile Campbell III. ii. 1, p. 424, 1886 ; Henderson, Challenger Anomura, p. 57, 

 1888 : Ortmann in Semon's Zool. Forschungsr, p. 30, 1894. 



Carapace not much depressed, its greatest breadth across the branchial 

 regions about five-sevenths of its length in the middle line ; with a few setse 

 near the antero-lateral borders. The limits of the gastric region are rather 

 faintly marked anteriorly and antero-laterally, 



Eyestalks thick, depressed, much broadened anteriorly, nearly as long 

 as the front border of the carapace, and reaching about three-quarters of the 

 way along the terminal joint of the antennular peduncle. The reniform 

 eyes take up about a third of the length of the terminal joint of the eye- 

 stalk. Antennal acicle setose, well overlapping the base of the last joint of 

 the antennal peduncle. 



Left cheliped vastly larger than the right, its length measured in a 

 straight line (chord) is more than half again as long as the sagittal line ot the 

 carapace, more than half its length being contributed by the very broad 

 (deep) hand : its merus has the lower border cristiform and dentate ; its 

 carpus has the upper (inner) border spinose, and all the outer surface covered 

 with imbricating squamiform tubercles, the free edge of which is evenly 

 fringed with short close-set setse : similar squamiform tubercles cover the 

 whole outer surface of the hand and fingers, those on the fingers being 

 smaller than those elsewhere. 



In the smaller cheliped the wrist and hand are beset with long setae and 

 have a spinose upper border ; but there are no imbricating tubercles, only 

 a few squamiform markings, herein differing from those of P. siriatus. 



The crawling-legs of the left side reach to, those of the right side consi- 

 derably beyond, the tip of the larger cheliped ; the dactyli in all are setose. 

 Elegantly-fringed squamiform tubercles, similar to those of the hand, cover 

 the upper surface of the last two joints of the second and third left legs, and 

 also the lower part of the outer surface of the merus and the whole of the 

 broad flat outer surface of the propodite and dactylus of the third left leg, 

 where they form two longitudinal rows ol " scales." 



On the right legs squamiform markings are present, but they do not 

 form distinct " scales " as they do in F. striatus. 



Colours in spirit : yellow, with a few small scattered reddish dots on the 

 legs and anterior part of the carapace : the " scales " of the left cheliped and 

 ot the outer surface of the two terminal joints of the third left leg are, each 

 and all, well defined by a red line. 



The length of the carapace of the only specimen in the I. M. collection 

 is 17 millim, 



