132 



Records of the Indian Museum. [Vol. XXIV, 



The lateral process of the antennular peduncle (text-fig. 10a) 

 reaches about to the middle of the basal segment. The spine at 



the outer distal angle of 

 the same segment is short 

 and the margin between 

 this spine and the arti- 

 culation of the second 

 segment is gently convex. 

 The free portion of the 

 shorter ramus of the outer 

 antennular flagellum is 

 only about one quarter the 

 length of the fused basal 

 part, the latter comprising 

 6 elongate segments. The 

 antennal scale (text-fig. 

 10b) is narrow at the 

 distal end and widest in 

 the middle ; its greatest 

 breadth is a little less than 

 one-third the total length. 

 The outer margin is very 

 slightly concave and ter- 

 minates in a strong spine 

 which reaches a little 

 beyond the end of the 

 lamella. 



The mandible (text-fig. 

 ioc) resembles Dana's 

 figure, but the palp consists only of a single segment, bearing a seta 

 near the apex. The exopod of the third maxilliped reaches only a 

 little beyond the end of the antepenultimate segment. The ter- 

 minal segment is two-thirds the length of the penultimate. The 

 first peraeopods reach about to the end of the antennal scale. The 

 merus is equal in length with the carpus lAirt about i"2 times as 

 long as the chela; the palm is a little swollen, and is fully 1*5 

 times as long as the fingers. 



The second peraeopods (text-fig. 11a) are equal and reach 

 beyond the scale by rather more than the entire length of the 

 chela. The merus is stout, not more than 3 - 5 times as long as 

 broad, about one-fifth longer than the carpus ; it does not possess a 

 spine at its distal end. The carpus is conical, less than 2"5 times as 

 long as its distal breadth. Anteriorly, on the dorsal side, the car- 

 pus is feebly furrowed transversely and the distal margin is re- 

 flected outwards. The carpus is a little longer than the fingers and 

 is rather less than two-thirds the length of the palm. The chela is 

 massive ; the palm is about 2"5 times as long as broad and is 1/75 

 times the length of the fingers. The tips of the latter are inturned 

 and their inner margins have blade-like cutting edges ; on the 

 dactylus there are two small and obscure teeth. 



Text-fig. 10. — Palaemouella orientalis Dana. 



a. Antennulc. b. Anlenrral scale. 



c. Mandible. 



