Indian Deep-sea Crustacea. 289 



The eye-stalk is triangular in section ; its inner margin is 

 prolonged into a short acute spine beyond the level of the 

 cornea, and on its outer side is the small, circular, darkly 

 pigmented cornea. 



The peduncle of the first antennae is about ^ the length of 

 the carapace and terminates in two flattened flagella. The 

 peduncle of the second antenna? is rather longer than that of 

 the first and ends in a tapering slender flagellum about 1|- 

 times the length of the carapace. 



The second and third joints of the external maxilliped are 

 expanded to form an irregular oblong cover. On the upper- 

 side of the second joint is a prominent pectinate ridge. 



The right is over twice the bulk, although not much 

 longer than the left great cheliped. The lower margin of 

 the ischium is armed with five small, subequal, acute, saw- 

 like teeth ; the proximal end of the lower margin of the 

 merus bears one somewhat larger tooth, and the distal three 

 joints, except for a small tooth on the cutting-edge of the 

 thumb, are smooth and unarmed. The second, third, and 

 fourth pairs of legs are of the usual type ; the fifth terminates 

 in a mass of hair obscuring the small subchelate linger. 



The appendages of the first two abdominal segments are 

 small and slender, the first terminating in a single thin short 

 limb, while the second ends in a pair of slightly stouter limbs. 

 The appendages of the succeeding three segments contrast 

 strongly with the first two pairs ; they terminate in a pair of 

 flattened subequal branches fringed with long hair, the outer 

 branch sickle-shaped, the inner lancet-like. On the inner 

 side of each inner limb is a short tooth-like process. 



Two specimens, one a female measuring 14*8 millim. in 

 extreme length, the other 11 millim., were obtained from 

 burrows in the interior of water-logged mangrove-twigs at 

 Station 233, 185 fathoms. 



Colour in life chalky white. 



Family Eryontidae. 



Pentacheles, Spence Bate. 



Pentacheles sculptus, S. I. Smith. 



Pentacheles scutytus, S. I. Smith, Bull. Mus. Comp. Zool. x. 1882-83, 



pp. 23-31, pis. iii., iv. 

 Polycheles sculptus, Faxon, Mem. Mus. Comp. Zool. vol. xviii. 1895, 



p. 122, pi. C, fig. 2. 



Five specimens (four males, one female) were obtained at 

 Stations 230 and 231, 834 and 836 fathoms respectively. 

 Ann. & Mag. N. Hist. Ser. 7. Vol. iii. 22 



