169 



The external maxillipeds reach to the end of the antennular peduncle. 



The 1 st pair of thoracic legs are slightly longer than the entire body : on 

 the upper border of the merus are 1 or 2 spines, and on the lower border 1 or 2 

 spines and some spinules : a claw-like spine is present at the far end of the 

 upper border of the merus and palm, and of both borders of the carpus : the 

 lower border of the palm is finely serrated : the whole hand is a little longer 

 than the merus, and the fingers, which are about as long as the carpus, are 

 about one-third as long again as the palm. 



The 2nd— 5th pairs of legs diminish in length, and very slightly in stoutness 

 also, in posterior succession, the 2nd pair being little more than a third the . 

 length of the 1 st pair : in the female all are perfectly chelate, but in the male 

 the last pair are imperfectly so. 



Colour in life, bright pink. 



In a large female the length of the carapace in the middle Hue is 54 millim., 

 of the abdomen 65 millim., and the length of the 1st pair of thoracic legs is 130 

 millim. , 



From the Andaman Sea, 370-419, 375, 405, 490 and 500 fathoms; Bay of 

 Bengal, 200-350, 561 and 678 fathoms ; Arabian Sea and G. of Manar, 295, 406, 

 445, 480, 487, 550, 595, 675, 696 and 740 fathoms. 



One of the females taken in 561 fathoms was luminous at two points 

 between the last pair of thoracic legs, where there is a triangular glandular 

 patch. 



-r, n tvt 6873 /rr £ , , . x 8513 39 521-22 3220 6015 6872 6875 



Regd. Nos. — (Type of the species) : -g- : - : -y- : — : — : — : — : 



97. Polycheles andamanensis, Alcock. 



Pentacheles andamanensis, Aloock, Ann. Mag. Nut. Hist., March 1894, p. 239. 

 Illustrations of the Zoology of the Investigator, Cri'stacea, I'latf. X. Fig. 3. 



Very closely resembles P. phosphorus, from which it differs only in the 

 following characters : — 



The carina of the 5th abdominal tergum culminates anteriorly in a spine, 

 which is as large as those of the 3rd and 4th terga. 



At the outer angle of the basal joint of the antennular peduncle there are 

 two spinelets. 



The narrow antennal scale does not reach the end of the antennal peduncle. 



In the female the large chelipeds are a little shorter than the body, and the 

 lower border of the merus and palm are perfectly smooth. 



In the single female specimen the spines of the lateral border of the carapace 

 are 4 or 5 + 3 + 0. 

 22 



