56 
BULLETIN Ob' THE UNITED STATES FISH COMMISSION. 
Keg to the J'orlo liican species of the genus Collodes. 
A Carapace more or lessgranulate inermis 
A'. Carapace smooth r leris 
Collodes inermis A. Milne Edwards. 
Collodes inermis A. Milne Edwards, Crust. Resj. Ilex., 171), 187S, pi. xxxn. f. 1, 1879. 
Carapace flattened, coarsely granulate on frontal region, the posterior portion of the carapace 
including the most protuberant part of cardiac region and the outer and lower portions of the 
branchial and hepatic regions; a few granules in center of gastric region; otherwise smooth; no spines 
nor tubercles on median line. Rostrum with two blunt teeth separated by a narrow sinus. Inter- 
antennular tooth small. Postorbital tooth subtriangular, anterior margin convex, posterior somewhat 
concave. Sternum granulate; abdomen nearly smooth, first segment with a median tubercle. Basal 
joint of antenna narrows anteriorly, its outer margin denticulate; the vertical plate near its inner 
margin is thick and unarmed, and anteriorly forms a rounded lobe. Chelipeds smooth ; palm thick; 
fingers gaping, irregularly toothed. Ambulatory legs very slender, 
especially terminal joints. 
Length of male, 8.7 mm.; width, 7 mm. 
Brazil, lat. 11° 4fK S., long. 37° 27 7 W. (type locality); Martin- 
ique ( Aurivillius). Depth, 8J to 30 fathoms. Porto Rico: Mayaguez 
Harbor, 12 to 18 fathoms, station 6061; off Puerto Real, 81 fathoms, 
station 6074. 
Collodes levis, sp. now 
Carapace narrow, moderately convex, pubescent, smooth, with- 
out spines, tubercles, or granules. Rostrum with a median sulcus, 
margin having a minute emargination forming two small lobes. Jnter- 
antennular tooth little developed. Postorbital tooth very small for 
the genus, reaching only about one-third the length of the eye-stalk. 
The hasal antennal joint has the vertical plate along inner margin 
strongly protuberant anteriorly and entire; outer margin feebly den- 
ticulate. Chelipeds feeble, smooth; palm subcylindrical ; fingers as long as palm, entire, slightly 
gaping. Sternum and abdomen smooth, pubescent. 
Dimensions of male: Length, 5.4 mm.; width, 4 mm.; ovigerous female, length, 5.5 mm.; width, 
4.6 nun. 
Off Vieques, 15 fathoms, station 6091; three females, types (Cat, No. 23772). Off Culebra, 14f to 
15j fathoms, stations 6086 and 6087, 1 male, 1 female; off Vieques, 16 fathoms, station 6092, 1 female. 
Genus BATRACHONOTUS Stimpson. 
lUitmclioviihis Stimpson, Bull. Mas. Comp. Zool., n, 122, 1871: A. Milne Edwards, Crust, Reg. Mex., 180, 1878. 
Carapace triangular, broadly expanded behind, especially in male; surface rough with granula- 
tions; gastric, cardiac, and branchial regions strongly protuberant; cervical depressions deep and 
broad, giving carapace a superior outline much like that of a frog’s back. Rostrum very short, scarcely 
projecting beyond the walls of antennulary fossa. 1 , slightly emarginated at the middle. Basal joint of 
antennae with dentate margins and a small tooth or spine at anterior extremity. Postorbital spine 
small, close to eye. Merus of outer maxillipeds broad, with prominent outer and inner front angles. 
Last two segments of abdomen in male and last three in female anchylosed. Ambulatory legs of first 
pair very long in male, more than twice as long as those of second pair; posterior pairs very short, 
in the female all the ambulatory legs are short. Dactyl i rather long. 
This genus is very closely allied to Collodes , from which it differs chiefly in its carapace, broader 
posteriorly, its smaller postorbital tooth, in shape of the hepatic region, which is angular in outline 
instead of rounded, the anterior margin being at right angles to median line, in the merus of the max- 
illipeds, which has the inner lobe more produced and transverse than in Collodes, and in the great 
length of the first ambulatory legs of the male. 
