Boone, Crustacea, Cruises of ''Eagle" and "Ara," 1921-28 135 



Material examined : One male taken in dredge, south coast of Cuba, 

 February 19, 1923, by the "Ara," William K. Vanderbilt com- 

 manding. 



Technical description : Carapace suboval, nearly subcircular, 23.4 

 mm. long, 28 mm. greatest width, frontal margin 8.5 mm. wide ; mod- 

 erately convex longitudinally, slightly so transversely ; dorsal surface 

 covered with coarse, irregular granules which are more prominent 

 anteriorly and on the branchial region, and with numerous, stiff, long, 

 club-like setae. The frontal margin is approximately equal to one- 

 third of the greatest body width and is divided into two pairs of lobes, 

 the very wide, submedian pair which are separated from each other 

 by a deep, narrow channel and have about six, stout, blunt conical 

 teeth or spines on the frontal margin of each lobe. The smaller, outer 

 pair of lobes are narrow and separated from the inner pair by a deep 

 sinus and consist of two conical teeth; this outer lobe is separated 

 from the preorbital spine by a V-shaped sinus. The preorbital spine 

 is a sharp, conical tooth ; the superior orbital margin is armed with 

 about eight irregular teeth, the postorbital spine is acute ; the inferior 

 orbital margin is armed with 8 or 9 coarse, sharp teeth which are 

 visible dorsally ; the three nearest the inferior inner orbital angle are 

 especially large and prominent and protruding and have several 

 coarse, spine-like granules on their outer basal surface. The antero- 

 lateral margin is armed with four primary teeth; of these, the first, 

 or preorbital tooth, is bifid, consisting of two conical spines separated 

 by a wide U-shaped sinus ; the second tooth is well separated from the 

 first and is trifid, consisting of a large, forward-curved tooth which 

 has a secondarj^ tooth on its anterior margin, also one on its posterior 

 margin, also a denticle-like tubercle at its posterior base; the third 

 tooth consists of a strong, forward-curved spine which has one to 

 three regularly placed tubercles on its proximal margins. The fourth 

 lateral spine is well separated from the third, which it closely re- 

 sembles. The postlateral margins are convergent ; the posterior mar- 

 gin is keeled. The urogastric and cervical grooves are deeplj^ im- 

 pressed; another groove extends back in the median line from the 

 frontal margin onto the gastric region and bifurcates, uniting with the 

 cervical groove. A groove circumscribes the orbit. The pterygostom- 

 ian region is granulate ; there is a prominent subhepatic, bifid tubercle. 

 The male abdominal belt is narrow, seven-segmented. 



The antennulae have the basal article greatly enlarged; the free 

 articles fold transversely, a little obliquely within the fossett. 



