152 BULLETIN 120^ UNITED. STATES NATIONAL MUSEUM 



Description. — Of the two specimens the male is much smaller 

 than the female. In both the carapace is just as wide at the hepatic 

 as at the branchial regions, but the rostrum is a little wider in the 

 female than in the male and its sides less parallel. (Fig. 53, h.) 



Measurements. — Male, holotype, length of carapace 5.7, width 

 3.7 mm. Ovigerous female (24155), length 8.6, width 6.4 mm. 



Range. — Known only from Porto Rican waters. 



Mate7'ial examined. — 



Ensenada Honda, Culebra Island, Porto Rico; February 9, 1899; 

 Fish Hawk; 1 male holotype (24154). 



Mayaguez, Porto Jlico; January 20, 1899; Fisli Hawk; 1 ovigerous 

 female (24155). 



EPIALTUS KINGSLEYI Rathbun 



Plate 45, fig. 1 



Epialtus kingsleyi Rathbun, Proc. Biol. Soc. Washington, vol. 36, 1923, 

 p. 71 (type-locality, Florida; holotype, Cat. No. 53068, U.S.N.M.). 



Diagnosis. — Rostrum dorsally carinate, truncate. Carapace widest 

 at hepatic regions. Cardiac region conical. (Fig. 53, I.) 



Description. — Carapace nearly as broad as long, broadest across 

 hepatic regions. Rostrum strongly deflexed, very high, broadest at 

 its middle, from which it tapers to a truncate tip which is an equi- 

 lateral triangle in front view; lower surface concave, upper surface 

 much smaller, triangular, followed anteriorly by an acute ridge from 

 which the sides fall obliquely. Orbital arches swollen, without 

 tooth. A small postorbital tooth or angle, close behind the eye. 

 Hepatic lobe much larger than branchial, extremity broadly rounded, 

 anterior margin nearly transverse, bearing a low tooth or tubercle 

 about half way between tip and eye, posterior margin convex. 

 Interregional sinus deep. Branchial lobe small, sides concave, ex- 

 tremity narrow, acute. Cardiac j:"egion very high, conical; branchial 

 region occupied chiefly by a smooth, round, boss. The antennae fall 

 short of end of rostrum. Third, fourth, and fifth segments of abdo- 

 men fused. 



The cheliped is heavy for the size of the animal and is elon^te, 

 the palm gradually increasing in height from the proximal to the 

 distal end, and, measured horizontally, is about twice as long as 

 the strongly arched fingers; it is sparingly tuberculated on and near 

 the upper margin. The merus is less obviously tuberculated, having 

 one or two tubercles on each margin. The fingers gape widely, the 

 propodal finger being curved well below the palm; at the proximal 

 third of the prehensile margin of the dactylus, there is a small tooth. 



Measurements. — Male, holotype, length of Qjarapace 7.7, greatest 

 width (hepatic) 7.2, branchial width 6.7 mm. 



Range. — Florida. 



