138 

 The branchial formula is as follows : 



Total 2ep.+ep. r. 1 5 =6 + 2 ep. + ep. r. 



83. Palcemon (Br achy car pus) laccadivensis, Ale. and And. 



Palzmonella laccadivensis, Alcock aud Anderson, Journ. Asiatic Soc. Bengal, Vol. LXI1I. pt. 2, 1894, p. 157. 



ILLUSTRATIONS OF THE ZOOLOGY OP THE INVESTIGATOR, CRUSTACEA, PLATE XXVI. FlG. 4. 



Rostrum about half the length of the rest of the carapace measured in the 

 middle line, upcurved, dorsally cristate and 9- or 10-serrate, ventrally cristate 

 and 2-serrate. 



Hepatic spine much larger than the postantennular. 



6th abdominal somite nearly twice as long as 5th : telson as long as both 

 combined, and equal in length to the elegantly-oval caudal swimmerets. 



Eye a little wider than the stalk. The antennular peduncle reaches nearly 

 three-quarters of the way along the antennal scale : its basal joint is the longest 

 and has its outer border distally produced to form a spine similar in size and 

 form to the " stylocerite." Antennal scale more than half as long as the carapace 

 proper. 



External maxillipeds slenderer and much shorter than any of the legs, not 

 reaching halfway along the antennal scale. 



The 1st pair of legs are the shortest of all, they reach beyond the antennal 

 scale by their chelae only. 



The 2nd pair are much the longest and by far the most massive of all, and 

 are unequal one being longer and stouter than the other, the chief difference 

 being in the length of the hand. The larger one is as long as the whole body 

 without the rostrum, a good deal more than half its length being contributed by 

 the hand : its palm, which is a stout subcylindrical joint, is about five times as 

 long as the wrist and twice as long as the fingers : the fingers are hooked at tip 

 and have the opposed edges channelled : the dactylus, which projects beyond the 

 fixed finger, has at its base a large tooth which closes between two teeth on the 

 fixed finger. The smaller one is a little longer than the abdomen, the hand 

 forming a good deal less than half its length : its palm, which is slenderer than 



