Boone, Crustacea, Cruises of ''Eagle" and "Ara," 1921-28 125 



vol. 9, No. 5, p. 69, 1921 ; Bidjr. Dierk. Zool. Amsterdam, 23E 

 Afl., p. 14, 1924. — Boone, Bull. Bingham Oceanog. Coll., vol. 1, 

 art. 2, p. 22, 1927. 



Genus : GLYPTOXANTHUS A. Milne Edwards. 

 Glyptoxanthus vermiculatus (Lamarck). 



Plate 39, figs. A and B. 



Diagnostic chaeacters: Carapace broadly ovate, moderately eon- 

 vex in both directions, interorbital region slightly more than one-fifth 

 of total width of carapace, rostrum a pair of short, broad, rounded 

 horns, slightly separated ; entire upper surface of carapace, chelipeds 

 and legs deeply pitted and eroded. 



Type: Lamarck founded this species on two specimens now in the 

 Paris Museum; the locality of these specimens is unknown, but is 

 believed by Dr. Alphonse IVIilne Edwards to be probably America. 



Distribution : Rare in southern Florida and the West Indian region. 



Material examined: One female taken in five fathoms, south of 

 Catalina Creek, Cuba, February 14, 1924, by the "Ara," William K. 

 Vanderbilt, commanding. 



Remarks : This is one of the most beautifully sculptured and col- 

 ored of the West Indian crabs. It spends the greater part of its time 

 quiescent in the crevices of the corals, which it so much resembles. 



Technical description: Carapace broadly ovate, moderately con- 

 vex in both directions. The interorbital region is slightly more than 

 one-fifth of the total width of carapace ; the rostrum consists of a pair 

 of short, broad, rounded horns, close to each other, with a median 

 groove running back to the gastric region, and with the frontal mar- 

 gin widely, roundly excavate, between the rostrum and the small, 

 rounded, orbital tooth; the postorbital tooth is similarly inconspicu- 

 ous. The anterolateral margin is broadly rounded and cut into four, 

 wide, shallow lobes, by the three major grooves which traverse the 

 hepatic-branchial regions; each lobe has its margin broken by the 

 corrugations of the upper surface. The entire upper surfaces of the 

 carapace, chelipeds and legs are deeply pitted and eroded. The cer- 

 vical groove is deep and bifurcate, the anterior branch running for- 

 ward and thence out across the hepatic lobe, the second groove tra- 

 versing the branchial lobe to the lateral margin, sending out midway 

 its length a short branch which runs forward and another which runs 



