22 Bulletin American Museum of Natural History (Vol. LIII 
half the length of the exposed portion of the basal segments of the antennular 
peduncles. 
The antennular peduncles are shorter than the antennal scales, but are slightly 
exceeded by the antennal peduncles; antennular scales, about reaching, or often 
slightly exceeding, the first segment of the peduncle; visible portion of the basal 
articles two-thirds the length of the second; third about half the length of the second. 
The blade of the antennal scale is at least as long as the spine. The antennal peduncle 
is shorter than in related species, being at least equalled or slightly exceeded by the 
antennal scales. 
In the shape and proportions of the large chela, and of the small one as well, 
there are no profound differences from the nearly related species. C. edwardsit 
as figured by Coutiére! is distinguished from all of the before-mentioned species in 
having the lower margin ending in a spine. The rostrum of C’. edwardsii is not con- 
tinued back on the carapace as a distinct carina, being broadly rounded between the 
orbital hoods; the spine of the antennal scale reaches beyond the blade much as in 
C. leviusculus, and the antennal peduncles are longer. As regards the carpal joints 
of the second pair of legs, our species is nearest the specimen of C. leviusculus described 
by de Man (loc. cit.), and very near Dana’s edwardsw (loc. cit.), differing from the 
latter in that the second article is about half again as long as the fifth, not equal to it 
in length; the first article is as long as the second, third, and fourth articles taken 
together, the third and fourth are subequal, and the second, as has just been stated, 
is about half again as long as the fifth. The merus of the third legs is unarmed below. 
Considering the close resemblance of our species in almost all 
characters except the blades of the antennal scales and the length of the 
antennal peduncle, I am inclined to believe that many, if not all, of the 
specimens of Crangon bouviert listed by various authors as from the 
West Coast of Africa are identical with the material before me. 
“Nearly all the specimens of this new species were taken at low 
tide from galleries in highly brackish water on the gently sloping shore of 
Banana Bay, east of Banana Peninsula. They were nearly always asso- 
ciated with a large, mostly solitary stone crab, Panopeus africanus? A. 
Milne Edwards, which had burrowed under flat stones, pieces of brick, 
wood or other hard objects partly imbedded in the firm fine sand by the 
action of the tides. In the mangrove swamps Crangon langi lived near 
the beautiful blue crab, Sarmatium curvatum H. Milne Edwards. They 
always make their own tunnels, which are seldom over six inches long 
and much too narrow to admit either of these crabs. Often as many as 
three might be found in the same retreat, but generally each one had its 
own burrow. Even at low tide the fine sand contained sufficient clayey 
matter to keep their retreats moist, although their channels might be 
several feet above the level of the water. When teased with a small 
11905, ‘Fauna Maldive and Laccadive Archipelagoes,’ p. 912, Pl. uxxxv1, figs. 50, 50a, 506 
*Lang, in Rathbun, 1921, Bull. Amer. Mus. Nat. Hist., XLIII, pp. 439-440. , 
