23 



The branchial formula is'as follows : — 



Arthrobranohia?. 



Total 



1+6 ep. 



19+6 ep. 



Synopsis of the Indian species of Haliporus. 



I. Integument thin but firm, glabrous : last two pairs of thoracic legs 

 very long, flagelliform. Size moderate or small :— 



1. Last pair of thoracic legs at least as long as the entire body 



from tip of rostrum to tip of telson : — 



i. Eyes large, their major diameter at least twice 

 that of the eyestalk : rostral carina quite in- 

 distinct behind the gastric region. Colour in 

 life pink 

 ii. Eyes small, their major diameter not nearly twice 

 that of the eyestalk : rostral carina quite distinct 

 to near the posterior edge of the carapace. 

 Colour bright orange ... 



2. Last pair of thoracic legs as long as the distance from the 



tip of the rostrum to halfway along the fifth abdo- 

 minal tergum : eyes little wider than their stalk. Colour 



* 



in life dark purple ... 

 II. Last two pairs of thoracio legs stout, long, but not flagelliform. 

 Size large : — 

 1. Integument leathery, glabrous 



S. ssqualis. 



H. neptunus. 



H. microps. 



H. taprobanensis. 



Integument membranous, flaccid, densely though finely hirsute H. villosus. 



6. Haliporus ceqiialis, Spence Bate. 



Haliporu* sequalis, Spence Bate, Challenger Crustacea JIacrura, p. 285, pi. xli. fig. 1 : Wood-Mason, Ann. Mag. 

 Nat. Hist., Oct. 1891, p. 277. 



Glabrous. Rostrum straight, moderately ascendant, not reaching to the end 

 of the 2nd joint of the ahtennular peduncle, its free portion less than half the 

 length of the rest of the carapace measured in the mid-dorsal line, its carina, though 

 just traceable to the posterior border of the carapace, is extremely indistinct 

 behind the gastric region : the rostrum is armed dorsally with 7 or 8, rarely 9, 

 teeth, two of which, on the gastric carina, are remote from the others. The 

 cervical groove is distinct almost up to the gastric carina : the groove defining 



