70 



In an average specimen the median length of the carapace and rostrum is 

 23 millim., of the abdomen 38 millim., of the exopodite of the 1st abdominal 

 appendages about 38 millim. 



Bay of Bengal, 240 and 609 fathoms : Arabian Sea, off the Malabar coast, 

 172 fathoms, off the Sind coast, 609-620 fathoms. 



-r, -, , T 6828-6829 /rn , ,, . v 6827 6831-6839 9280 9282 1167 



Kegd. Nos. — 9 — (Types of the species) : — : § — : — : — : — . 



35. Psathyrocaris plimiosa., Alcock and Anderson. 



Psathyrocaris plumosa, Alcock and Anderson, Journ. Asiatic Soc. Bengal, Vol. LXIII. pt. 2, 189-1, p. 159. 

 Illustrations of the Zoology of the Investigator, Crustacea, Plate XII. Fig. 5. 



Differs from P. fragilis only in the following points : — 



The integument is covered with a fine short branny tomentum, and the 

 appendages are much more setose. 



The rostrum is a little longer and the eyes are of a light brown colour. 



The terminal joint of the external maxillipeds is a little broader. 



In the 2nd pair of thoracic legs the fingers are quite as long as the palm, 

 and the teeth are stronger. 



From the Arabian Sea, off the Travancore coast, 902 fathoms. 



Regd. No. -g- (Type of the species). 

 36. Psathyrocaris platyophthalmilS, Alcock and Anderson. 



Psathyrocaris platyophthalmus, Alcock and Anderson, Journ. Asiatic Soc. Bengal, Vol. LXIII. pt. 2, 1894, p. 158. 

 Illustrations of the Zoology of the Investigator, Crustacea, Plate XII. Fig. 6. 



The only points in which this species differs from P. fragilis are the 

 following : — 



The eyestalks are so much compressed vertically as to be sublaminar, and 

 only a thin crescent of the eye can be seen in a dorsal view. 



The antennular scale reaches about halfway along the 2nd joint of the 

 antennular peduncle. 



In an egg-laden female the median length of the carapace and rostrum is 

 34 millim., of the abdomen 59 millim., of the exopodites of the 2nd pair of 

 abdominal appendages 52 millim. 



Colour in life crimson. 



The eggs are few (in one specimen 6, in another 9) and are of enormous 

 size, having a major diameter, even after contraction in spirit, of not less than 

 6 millim. 



In the original notice of the species the abdominal exopodites were said to be shorter than 

 those of P. fragilis, but the examination of further and better preserved material shows that this 

 is not the case to any marked extent. 



