64 
BULLETIN OE THE UNITED STATES FISH COMMISSION. 
margin finely crenulate. Cheliped of male (perhaps not fully developed) rather feeble. The arm, 
wrist, and proximal fourth of palm are finely granulate; (he arm has sharp granulated margins. The 
greater part of palm is smooth and shining; three times as long as wide; the lingers gape slightly for 
two-thirds their length and are finely denticulate. Crests of meral joints of ambulatory legs of about 
equal width; anterior crest has one or two teeth, the posterior one has a 
rectangular distal prolongation. The carpal joints have a triangular 
inner tooth and a narrow outer crest. Surface sparingly pubescent; some 
longer hairs form lines on rostrum and in the depressions of carapace. 
Dimensions of male: Length, 10 mm.; width, 8.2 mm. 
A male and a young female were taken at Ensenada Honda, Culebra 
(Cat. No. 23773). This species is readily distinguished by its spines and 
sharp tubercles and elongate basal antennal joint. 
Genus LISSA Leach. 
L/.s'sa Leach, Zool. Misc., it, 69, 1815. 
Ursula Kafinesque, Amer. Monthly Mag., Ill, 272, Aug., 1818. 
Fig. 10. — Thoe as/icra, male. («) 
Carapace, x 2.5. (b) Merus of 
an ambulatory leg of right 
.side, x 6. 
Carapace very convex; surface very uneven; mesogastric region 
especially elevated, sides of gastric and branchial regions steep. Preoc- 
ular spine or tooth present. Horns of rostrum flattened, contiguous, truncate, outer extremities of 
anterior margin forming a small lateral lobe. Orbit with a superior and an inferior closed fissure; 
eyes when retracted fitting into cup-shaped inconspicuous postorbital lobe. Basal joint of antenna; 
much enlarged, entire, distal margin of outer portion united with front margin of carapace. Ischium 
of outer maxillipeds inwardly strongly advanced; merus subtriangular, dilated outwardly; a very 
shallow sinus at articulation of palpus. Chelipeds with palm compressed, sometimes carinated; 
fingers gaping at base in the male. Ambulatory legs of moderate length, decreasing rapidly in size 
from the first to last, either cristate or nodose; dactyli unarmed. 
Lissa bicarinata Aurivillius. 
Lissa bicarinata Aurivillius, Kongl. Sv. Vet. Akad. Hand., Bd. 23, No. 4, 54, 1889; Rathbun, Bull. Lab. Nat. Hist. State Univ. 
Iowa, iv, 255, 1898. 
Carapace with two rounded median prominences, one gastric and one cardiac, the former much 
larger and higher. From the gastric prominence two ridges run divergently backward to postero- 
lateral angles of carapace. Both the median prominences and ridges are indistinctly tuberculate. 
Posterior outline arcuate and separated from blunt postero-lateral angles by a broad rounded sinus. 
Sides of branchial and gastric regions steep. Outer margin of branchial region with abroad and shallow 
tooth at its middle. Outer margins of hepatic regions almost parallel. Rostrum wide, deflexed, sub- 
truncate, widening at extremity, which is four-lobed; median lobes rounded and separated by anarrow 
U-shaped fissure; outer lobes smaller, blunt, slightly less advanced than median. Upper surface of 
rostrum slightly concave in a longitudinal direction. There is a short, acuminate preorbital spine 
directed obliquely upward. Legs furnished with triangular laminate crests. 
Dimensions of ovigerous female: Length, 9.5 mm.; width, 9.2 mm. 
Bahama Banks; St. Bartholomew (Aurivillius). Mayaguez Harbor, 4 to 6 fathoms, station 6065; 
off Vieques, 121 fathoms, station 6095. 
Genus TELEOPHRYS Stimpson. 
Telcophrys Stimpson, Amer. Jour. Sci. (2), xxix, 133, 1860. 
Allied to Mitlirax , but distinguished by the character of the orbits, which have the superior and 
exterior margins entire, and not armed with tubercles or spines. There is sometimes an indication of 
a superior fissure entirely closed up, but no trace of an exterior one. Basal joint of external an ten me 
rather narrow for the group to which this genus belongs, tapering anteriorly, armed with a slight 
tooth at antero-exterior angle and another still smaller at middle of outer margin. Merus of outer 
maxillipeds broader than ischium, three-fourths as long, and notched at internal angle for reception 
of palpus. Legs cristate. 
