1896.] A. R. S. Anderson— Beep Sea Crustacea. 105 



The chelipeds (in the female) are sub-equal. The merus and 

 ischium are curved to correspond with the much inflated branchiostomial 

 region. The former is triangular in section and bears sharp spines on 

 its upper and a few small spines on its lower external margins. The 

 outer and upper surfaces of the carpus are covered with short sharp 

 tubercles, of which one at the distal extremity is pre-eminent in size. 

 The band is vertically elongated and studded with four rows of small 

 tubercles on its outer side and some scattered larger sbarp tubercles on 

 its upper margin. Tbe fingers are placed somewhat obliquely, leave a 

 slight hiatus at the base when closed, are 5- or 6-dentate on the cutting 

 edges and the movable one bears a few small tubercles on its upper 

 margin near its base. 



The upper margin of the meri of the 2nd, 3rd, 4th and the upper 

 margin and posterior surface of the merus of the 5th thoracic legs are 

 armed with sharp spines some 2 millims. in length. The carpi and 

 propodi also carry a few acuminate tubercles. The dactyli are long 

 and styliform. 



The abdomen is covered with coarse yellow hairs and is seven jointed ; 

 a median ridge on all the segments except the last bears a few tuber- 

 cles ; those on the 1st and 2nd segments resemble the tubercles on the 

 posterior part of the carapace, but on the other segments they gradually 

 diminish in size to mere granules on the 6th, and on the 7th they are 

 absent. 



Length of carapace including rostrum ... 64'0 millim. 

 Breadth ,, ,, ... ... 55'5 ,, 



Depth ,, ,, including thickness of 



abdominal segments ... ... 35'0 „ 



Greatest span tip to tip of 3rd legs ... 210*0 „ 



Length of chelipeds (along chord from tip 



of dactylus to basis) ... ... 55 - „ 



Colour in life pale bluish yellow. 

 Station 204 ; 180-217 fms. 



This species will be figured in the Illustrations of the Zoology of 

 the R. I. M. S. 'Investigator,' Crustacea, pt. iv., pi. xxv., figs. 4, 4a. 



Tribe OXYBHYNCHA. 



Family Maiidae. 



Scyramathia, A. Milne-Edwards. 



53. Scyramathia rivers-andersoni, Alcock. 



Alcock, Carcinological Fauna of India, J. A. S. B., Vol. LXIV., pt. ii„ 1S95, p. 203 

 111. Zool. R. I. M. S. ' Investigator,' Crustacea, pt. iv., pi. xxii., figs. 2 and 4. 



Colour in life pale pink, deeper on chelipeds. 

 Station 197 ; 406 fms. 

 J. ii. 14 



