164 " THETIS " SCIENTIFIC RESULTS. 



42-48 fathoms. The female example agrees with Henderson's 

 description generally. The nine gastric prominences are, however, 

 broadly conical and subspiniform ; not " rounded tubercular 

 processes." 



The male dififers from the female in many important characters, 

 which may be enumerated as follows : — 



The gastric and first antero-lateral spines are larger ; they arise 

 from broader bases and taper gradually to acute points. The 

 spines on the inner border of the meral joint of the chelipedes 

 are almost equal in size to those on the outer and upper, and the 

 internal and external surfaces are more or less studded with 

 subspiniform granules. The chelse are much larger ; the fingers 

 proportionately shorter, stouter and marked on both sides with 

 numerous deep pits, from which arise tufts of long yellowish setae. 



The hand bears numerous rounded and some spiniform granules; 

 the upper border of the palm has a narrow irregular band of 

 small rounded granules, and there is a single row of nine larger 

 ones on its internal aspect ; the internal surface has three longi- 

 tudinal rows— one central and two subcentral, and rather nearer 

 the centre than the borders; the external surface has also three 

 short rows, which are confined to the proximal third ; the median 

 row is the most distinct, and extends a little beyond the others. 

 The whole of the lower border is covered with a broad band of 

 spiniform granules ; those on the irmer margin are larger, seriately 

 disposed, and about ten in number. The upper borders of the 

 meral joints of the first three pairs of ambulatory legs are armed 

 with from eight to ten strong curved spines ; the lower borders 

 carry from six to nine, which are shorter and less curved than 

 those on the upper. 



The anterior angle of the merus joint of the external maxilli- 

 pedes bears a few small spinules on its distal third ; they 

 commence on a level with the summit of the rounded lobe on the 

 external border. 



The " Challenger " examples were obtained at Ki Island, at a 

 depth of 140 fathoms, and off Zebu, Philippine Islands, in 95 

 fathoms. 



Length of carapace of female ... ... 30 mm. 



Breadth of ,, ,, ... ... 23 ,, 



Length of right chelipede ... ... ... 50 ,, 



,, ,, merus ... ... ... ... 15 ,, 



,, ,, carpus ... ... ... ... 9"5 ,, 



,, ,, propodus ... ... ... ... 21*5 ,, 



Depth of palm... ... ... ... ... 7 ,, 



Length of fourth right leg ... ... ... 72 ,, 



,, ,, merus ... ... ... ... 22*5 , 



