82 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
inclosing a gradual, somewhat convex, slope toward front. Ridge of branchial region also crenulated 
and bent at middle at an obtuse angle, almost a right angle. In the male each protuberance of carapace 
is surmounted by an acute spine, while in the female the apical angles are not thus acute. Margin of 
carapace more or less distinctly crenulated, especially antero-lateral margin, at the outer or posterior 
end of which are three small and not very well-marked teeth. Antero-lateral margin concave anteriorly, 
convex posteriorly. Posterior margin straight, lateral angles sharply defined and even spiniform in 
male. Eyes rather large, with' a minute tubercle on anterior side of extremity. Basal joint of external 
antennae somewhat longer than next j oint. Epistome of moderate length. External maxillipeds naked ; 
ischium tuberculated near outer margin and near extremity. Sternum with a few tubercles between 
bases of chelipeds. Chelipeds long, naked, except some inconspicuous setae on crest of hand. Merus 
with denticulated margins and with surface above for the most part smooth and glossy, but with a few 
tubercles near the margins. Carpus with five denticulated crests. Hand trigonous, with ten strong 
teeth on inner crest, twelve to fourteen small granulated teeth on outer margin, and fifteen teeth 
increasing regularly in size toward extremity on lower margin; upper surface with two rows of tubercles, 
inner surface with two rows, and outer surface with three rows; all the tubercles ornamented with from 
two to five granules. Fingers very small, between a fourth and a fifth the length of palm; dactylus 
when flexed almost at right angle with palm. Ambulatory legs compressed, naked, polished, with a 
laminiform crest above; the merus joints of posterior pair have a crest below, which has a lobe-like 
expansion at inner extremity. Abdomen tuberculated at sides, that of male tapering slightly. 
Dimensions of male: Length, 9.2 mm.; width, 10 nmi. 
Mayaguez Harbor, 75 to 76 fathoms, station 6063; off Punta de Melones, 8 fathoms, station 6073. 
Previously collected at Little Bahama Bank; Gulf of Mexico; Florida Reefs; Cuba; in depths of 50 to 
338 fathoms. 
Solenolambrus decemspinosus Rathbun. 
Solenolambrus decemspinosus Rathbun, Proc*. U. S. Nat. Mus., xvn, 84, 1894. 
Closely allied to <S‘. typicus. Antero-lateral margin convex ; area between the two anterior gastric 
ridges narrower than in S. typicus; gastric and cardiac prominences terminating in slender spines. 
Eight additional dorsal spines — two on each branchial ridge, of which the posterior or marginal is the 
longer, one at each posterior angle, and one on postero-lateral margin midway between the last and 
branchial spine. Surface finely punctate. Sternum smooth between bases of chelipeds. Terminal 
segment of abdomen of male much longer and distally narrower than in S. typicus, its sides deeply 
concave. Merus of the outer maxillipeds narrower and more produced at antero-external angle than 
in S. typicus. Chelipeds similar to those of S. typicus. The second, third, and fourth pairs of ambulatory 
legs more or less cristate below. 
Dimensions of male: Length, 6 mm.; width, 7 mm. 
Off entrance to San Juan Harbor, 45 fathoms, station 6051, 1 male. Gulf of Mexico, 60 fathoms 
(type locality). 
Genus CRYPTOPODIA Milne Edwards. 
Cryptopodia Milne Edwards, Hist. Nat. Crust., I, 360, 1834. 
Carapace very broadly triangular, with very large lateral clypeiform vaulted expansions which 
conceal the ambulatory legs and are prolonged posteriorly far beyond base of abdomen. A ridge 
extends from gastric region across branchial region to the postero-lateral margin. Rostrum nearly 
horizontal,' spatuliform and very prominent. Pterygostomian regions smooth, not ridged. Orbits very 
small, nearly circular, with a suture in superior margin. Epistome well developed; antennulary fosste 
narrow and somewhat oblique. Eyes very small and retractile. Basal antennal joint slightly dilated, 
not nearly reaching internal orbital hiatus, which is filled by the second joint. Buccal cavity and 
external maxillipeds small. Merus of maxillipeds distally truncated, antero-external angle produced. 
Chelipeds allied to. those of Lambrus. Ambulatory legs with the fourth, fifth, and six joints more or 
less cristate. 
Cryptopodia concava Stimpson. 
Cryptopodia concava Stimpson, Bull. Mus. Comp. Zool., n, 137, 1871; A. Milne Edwards, Crust. R6g. Mex., 168, pi. xxix, figs. 
1 and 2, 1878. 
Carapace a little broader than long; antero-lateral margins twice as long as postero-lateral and 
meeting them at an obtuse angle; postero-lateral margins converging posteriorly very slightly, posterior 
margin straight in female, very slightly emarginate in male. Gastro-branchial ridges granulate; 
