Boone, Crustacea, Cruises of "Eagle" and "Ara," 1921-28 141 



convex and entirely covered on the upper surface with long, acute 

 spines, interspersed with stiff setae; the larger palm is moderately 

 convex on the outer surface, widest at the base of the fingers and 

 covered on the upper two-thirds of the outer face with spines, larger 

 on the upper margin and dwindling in size below. These rows of spines 

 taper off diagonally toward the base of the propodus, the lower part 

 of the palm being smooth ; on the smaller palm the entire outer surface 

 is covered with spines. The propodal fingers are thick, grooved longi- 

 tudinally and the smaller one armed proximally with spinules, the 

 cutting edge of each with four strong teeth. The hinged fingers are 

 more curved, each with many spinules proximally; the tips of the 

 fingers acute. 



The ambulatories are long, slender, very hairy along the lateral mar- 

 gins; the anterior distal angle of each the meral and carpal joints 

 armed with an acute spine ; the dactyli long, acuminate tipped. 

 Synony.aiy. — Pilumnus spinifer H. Milne Edwards, Hist. Nat. Crust., 



vol. 1, p. 420, 1834.— Lucas, Explor. Sci. de I'Algerie, Zool., vol. 



1, p. 12, 1849. — Heller, Die Crustaceen des Sudlichen Europa, 



p. 73, 1863, Wien. 



Pilumnus floridanus Stimpson. 



Plate 46. 



Diagnostic characters : Carapace narrower than that of the nearly 

 related species, P. aculeatus. 



Type: The type was found at the Tortugas by the "BlaJce" Expe- 

 dition and was deposited in the U. S. National Museum, but is prob- 

 ably destroyed. 



Distribution: A reef dweller from the Bahama Banks and Tor- 

 tugas southward to Curagao. The "Ara" material appears to be the 

 first record of the species from Cuba. 



Material examined : One specimen dredged in 3 fms., Cape Cruz, 

 Cuba, February 11, 1924. 



Technical description: Carapace but little convex, 8 mm. long, 

 10 mm. wide, frontal margin 6 mm. wide, without dentition, slightly 

 incised in the median line; a wide, prominent, convex lobe on either 

 side of this incision; outer half of the superior orbital margin with 

 three spine-like teeth, inferior orbital margin with eight or nine well- 

 developed teeth, the two nearest the infra-orbital angle being the most 

 prominent. The anterolateral margin is short and is armed with four 



