DECAPODS 155 
Eyes reaching nearly to end of first antennular segment, oblong, more 
than twice as long as wide; sides subparallel; antero-external angle 
rounded; antero-internal angle produced in a tuberculiform tooth, these 
teeth being slightly divergent from each other; eyes without pigment. 
First segment of antennular peduncle longest; second segment stouter, 
and a little shorter, than the third; flagella subequal and less than twice 
the length of peduncle. The antennal peduncle overreaches the antennu- 
lar by the length of the last and one third of the preceding segment; the 
penultimate segment is twice as long as the antepenultimate and one and 
a half times as long as the ultimate; the flagellum is nearly as long as the 
body. The ischium and merus of the outer maxillipeds, while wider than 
the succeeding joints, are not very broad; the ischium has a lobiform 
opercular dilatation on its inner or lower margin; dactylus almost circular. 
The chelipeds are very unequal; the larger one is equal to the cara- 
pace and first four abdominal somites combined; the ischium has a few 
minute spinules at the proximal end of its lower edge; the merus may 
have a small spine at the proximal end of its lower margin, or it may (as 
in the largest specimen) be devoid of armature; the carpus is nearly 
twice as deep as it is long and one half as long as the palm; its lower 
angle is rounded; the palm is a little longer than high, and subequal in 
length to the dactylus; its distal lower quarter has a few tubercles 
irregularly disposed, from which proceed bunches of hair. The lower 
margin of the ischium, merus, and carpus, and both upper and lower 
margins of the manus are carinated. The dactylus is longer than the 
pollex; the upper surface is very broad and has a rounded carina on the 
inside and the outside; the outer one is tuberculate near the base of the 
finger; the outer margin of the cutting surface has a broad tuberculated 
tooth near the palm, and a lobe near the tip; the inner margin of the 
cutting surface is tuberculate along its distal half; the pollex has a stout 
tooth on the upper edge. The fingers gape widely in the male, not at 
all in the female, and are beset with bunches of long hair. 
The smaller cheliped is one third as wide as the larger and reaches 
only to the distal third of the palm of the larger. The ischium and 
merus are similar to those of the larger cheliped; the carpus is longer 
than high, lower angle subacute. The palm is a little shorter than the 
carpus, longer than wide. Dactylus slender, nearly twice as long as the 
palm and longer than the pollex, which is armed with a single sharp 
tooth at its proximal third; the fingers do not gape, as they overlap far 
from the extremities. 
The second, third, and fourth pairs of legs are stout and compressed, 
and increase slightly in length in the order named; the fifth pair is as 
