Boone, Crustacea, Cruises of "Eagle" and "Ara," 1921-28 31 



The first maxillipeds are slender, the distal articles are unfortu- 

 nately broken in the present specimen. 



The retrochela is large, the ischium with a reinforced distal joint, 

 the merus elongated, about as long as the carapace, convex outwardly 

 with a cup-like excavation on its upper distal border ; the inferior mar- 

 gin carinate and excavate beneath ; the carpus is small, with a subdis- 

 tal tooth on its outer margin ; the propodus is one and one-third times 

 longer than the merus, flattened, convex distally on the outer margin ; 

 the inner margin more convex proximally ; its outer edge banded with 

 fine denticulations ; the inner edge with four articulated spines prox- 

 imally; the dactyl is as long as the propodus, very curved apically, 

 slender, with eight curved acuminate teeth on its inner side and with 

 the ninth, or apical tooth very strong, all fitting into the sheath-like 

 apertures of the propodus. 



•The third maxillipeds and first and second thoracic legs are similar, 

 the proximal four joints slender; the propodus subovate, laminate, 

 nearly subcircular, its anterior margin ciliate; the dactyl is slender, 

 curved, acuminate, folding across this ciliate margin, claw-like. 



The fourth, fifth and sixth thoracic legs are weak, stick-like, each 

 with an epipod as long as the related article ; the distal article bears 

 a heavy brush of setae. 



The pleopoda are heavy, well developed. 



As pointed out by Miers, the principal distinguishing character be- 

 tween L. maculata and L. glahruiscula was long believed to be the 

 different dentition of the retrochela, the Indo-Pacific form having nine 

 or ten, the West Indian L. glahruiscula having from five to seven 

 teeth or spines. The large West Indian specimen taken by the "Ai^a" 

 has ten teeth on the retrochela, while younger West Indian specimens 

 I have examined have only five to eight. Hence it becomes necessary 

 to unite the two species under the older name, L. maculata. 



Synonymy: Squilla arenaria Eumphus, Amboin. Rarit., p. 6, pi. 3, 

 fig. E, 1705. 



Squilla maculata Fabricius, Ent. Syst., vol. 2, p. 511, 1793 ; Suppl., p. 

 415, 1798. — Lamarck, Hist. Anim. sans Vert., vol. V, p. 188, 

 1818. — ^Desmarest, Consid. Crust., p. 250, 1825. — Latreille, 

 Meth. Hist. Nat., vol. X, p. 470, 1825.— H. Milne Edwards, Hist. 

 Nat. Crust., vol. 2, p. 518, pi. 26, fig. 11, 1837.— DeHaan, Fauna 

 Japon. Crust., p. 221, 1849. — White, List Crust. Brit. Museum, 

 p. 83, 1847. 



