MEXICAN, CENTRAL AMERICAN, AND CUBAN CAMBARI 9 
there are one to three more, forming an irregular row in the 
middle of the lower side. 
Female: Young females are like young males, older indi- 
viduals have the pilosity of the fingers well developed, but the 
chelipeds are less elongated than in old males, and consequently 
comparatively broader. The spines of meropodite and carpop- 
odite of the chelipeds also have the tendency to disappear in 
very old individuals. Annulus ventralis.a blunt, low, sub- 
conical tubercle, with an S-shaped longitudinal fissure. 
Measurements: 
The following are the measurements of the two type-speci- 
mens: & (I): total length 72 mm.; carapace 36, anterior sec- 
tion 23, posterior section 13; abdomen 36; length of hand 30, 
width of hand 8. &: total length 62 mm.; carapace 31, an- 
terior section 20, posterior section 11; abdomen 31; length of 
hand 19, width of hand 6. 
The largest females measure 68 mm.; the largest male is the 
above type. 
Localities : 
Types and Cotypes: Coche, prés de la riviere de Coban, 
Guatemala.—Exped. du Mexique. Bocourt (Mus. Paris, 10 
J (1), 3 F (ID, 9 ©). 
Belize, British Honduras. — Exped. du Mexique (Mus. Paris, 
Huh) 
Remarks: There is quite a difference in the features of old 
and young individuals. Generally, in specimens less than 45 
mm. long, the pilosity of the fingers is not developed, and merop-' 
odite and carpopodite of the chelipeds possess sharp spines. 
There is a 2, 45 mm. long, which shows traces of pilosity, 
while two males of the first form, of 49 and 50 mm. respectively, 
do not show it. The smallest male of the first form that has it, 
is 58 mm. long. Upward of this size all specimens have the 
fingers densely pilose. The spines of the chelipeds disappear 
entirely only in the oldest individuals; the smallest male (first 
1] have not been able to locate this place, nor a river ‘‘ Coban ’’; but Coban 
is the well-known capital of the province of Alta Vera Paz. The river at Coban 
is called Rio Cahabon. Coban, Alta Vera Paz, is the locality for a species of 
Cambarus mentioned by Huxley (1878). 
