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RATHBUN: CRABS FROM THE MALDIVE ISLANDS. 12% 
of the buccal cavern. The two ridges on the ischium of the outer maxillipeds 
are further apart than in P. jukesvz. 
The chelipeds of the immature male are equal and very slender, scarcely 
stouter than the last pair of legs, and about as long as the carapace. The palm 
is a little shorter than the ischium and nearly twice as long as the fingers, 
which are bent down, deeply grooved, and meet throughout their length. 
In the first three pairs of legs the merus is stout and broad, with a granular 
dorsal surface and coarsely and unevenly serrulate edges, the anterior edge 
ending in a crest-like tooth. The carpus is dorsally bicarinate and its anterior 
border has the form of a two-lobed carina. The propodus and dactylus are 
edged with thin sharp caring, that on the anterior margin of the carina of the 
second and third pairs being plumed. The fourth pair are cylindrical and 
finely granular, the dactylus considerably shorter than the propodus, the latter 
having a posterior marginal border of sete. 
The first pair of ambulatory legs are a little longer, the fourth pair a little 
shorter, than the carapace, the second and third pairs about one and a half 
times as long as the carapace. 
In the male all the abdominal terga except the last are transversely carinate, 
the carine of the second and third terga being most conspicuous. Also on 
either side of the sternum there are two crests, one behind the base of the last 
pair of legs, the other almost in a line with the third abdominal carina. 
Dimensions. — Male, length of carapace, 6.4 mm.; width between outer 
orbital angles, 6.9 mm.; width between tips of next lateral teeth, 7.7 mm. ; 
width between bases of second and third legs, 6 mm. 
Color. — In alcohol there are traces of dark speckles; there is a larger circu- 
lar spot on each protogastric region and each cardiac lobule. 
Type locality. — Nallandu, at anchorage, 24 fathoms, January 18 ; two males, 
immature. 
This species can be separated at sight from all others by the carapace being 
wider in front than behind. 
PILUMNIDA. 
Carpilodes pediger Atcocx. 
Carpilodes pediger Aucock, Journ. Asiatic Soc. Bengal, LXVII. 83, 1898. Illus. 
Zool. Investigator, Crust., part VII. pl. XXXVI. fig. 4, 1899. 
Male, at anchorage, January 11 ; one male. 
Nallandu, at anchorage, 24 fathoms, January 18; two females, one with ova. 
The specimens are all small, the female with ova measuring 3.7 mm. long 
and 5.8 mm. wide ; its carapace is a light yellowish red in alcohol, with lateral 
teeth gray and mottlings of gray on the posterior half. 
