Boone, Crust atea, Cruises of "Eagle" and " Ara," 1921-28 63 



The second, third and fourth legs are approximately similar and 

 not greatly differing in size; all have the meral joint inconspicuous 

 and the carpal joint greatly enlarged, with the anterior margin con- 

 vex and the anterior distal end forming a rounded triangular lobe; 

 the third leg has the carpus much larger and the distal angle longer 

 than do the other legs; the propodus is short and thick, much wider 

 than long, with the dactyl arising from the distal end, resting upon 

 the distal and inner lateral margin of the propodus, which is shaped 

 for this ; the dactyl is very large and curiously shaped, the posterior 

 lateral margin being regularly convex and the anterior margin trun- 

 cate for a short space and then deeply concave, thus forming a sub- 

 basal tooth and a distal tooth which is somewhat sickle-shape; the 

 basal tooth of the third leg is bluntly triangular; on the fourth leg 

 it is narrow, more attenuated, sickle-shaped; on the fifth leg it is a 

 broad, acuminate triangle. 



The fifth legs are linear, weak, the ischium greatly elongated, sub- 

 equal to the merus; the carpus is three-fourths as long as the merus 

 but slenderer; the propodus is three-fifths as long as the carpus and 

 has a short, stocky lower finger, which, together with the minute 

 dactyl, forms a miniature chela ; there is a thick tuft of setae on the 

 distal end of the propodus. 



The eggs are small, spherical, ivory, about three hundred to the 

 female. 



Synonymy. — Lepidopa venusta Stimpson, Ann. Lye. Nat. Hist. N. Y., 

 vol. 7, p. 79, 1859 ; Proc. Acad. Nat. Sci. Phila., p. 230, 1858.— 

 Hay and Benedict, Proc. U. S. Nat. Mus., vol. 26, p. 892, 1903. 

 — Hay and Shore, Bull. U. S. Bur. Fish., vol. 35, p. 415 (see re- 

 marks under Lepidopa websteri), 1918. 

 Lepidops venusta Miers, Journ. Linn. Soc, vol. 14, p. 332, 1879. — 

 Kingsley, Proc. Acad. Nat. Sci. Phila., vol. 31, p. 410, 1879. 



Family: HIPPIDAE. 



Genus : EMEEITA Gronovius. 



Emerita emerita (Linne). 

 Plate 17, figs. A, B, C and D. 

 Diagnostic characters : Carapace shuttle-shaped, very concave, 

 widest in the middle; legs nonchelate, falcate; antennae very long. 

 This species is confined to the eastern coast of North America and 

 South America and is readily found in abundance in the tropic and 

 subtropic regions. It is easily distinguished from its West Indian 



