Boone, Crustacea, Cruises of "Eagle" and "Ara," 1921-28 211 



leg. The ischium is greatly elongated, clavate, dilated distally; the 

 merus is quite small, the carpus is about twice as long as the merus, 

 very convex ; the propodus has the palm dilated, convex, nearly twice 

 as long as the carpus ; the propodal finger is two-thirds as long as the 

 palm, triangulate, curved slightly, acuminate, with a triangular basal 

 tooth ; the dactyl or hinged finger is longer than the propodal, slender, 

 very curved, like a scimitar, with a triangular tooth midway the cut- 

 ting edge; the fingers cross on one another, one-third of the dactyl 

 and nearly half the propodal finger extending beyond the point of 

 crossing. 



The sixth and seventh legs are slender, successively shorter ; the pro- 

 podus slender; the dactyl relatively straight and not over two-thirds 

 as long as the related propodus. 



The fifth, sixth and seventh legs each have broad, ovate epipodites. 

 Synonymy : Cancer sedentarius Forskal, P. Decriptiones Animalum, 

 Avium, Amphihiorum, Piscium, Insectorum, Vermium quoe in 

 itinere orientali ohservavit Petrus Forskal. Hauniae, p. 95, 

 1775. 

 Phronime sedentarius Latreille, Hist. Nat. des Crust, et des Insectes 

 (suites a Buffon), Paris, 1792-1805, vol. 6, p. 291, 1803. (Ex- 

 tensive synonymy). 

 Phronima custos Risso, Hist. Nat. Crust, des environs de Nice, Paris, 

 1816, p. 121, pi. 2, fig. 3. — ^LucAS, H., Explorations scientifique 

 de I'Algerie pendant les annees 1840, 1841, 1842, Zool., p. 57, pi. 

 5, fig. 5, Hist. Nat. des Animaux articules Paris, 1849. — Claus, 

 Zeitschr. fur "Wissench Zool., vol. 12, Leipsig, 1862, p. 195, pi. 19, 

 fig. 1, et fig. 4-6. — Stebbing, Kept. Voyage Challenger Amphi- 

 poda, vol. 29, p. 1357, pi. 162, B, 1888.— Bovallius, K. Svenska 

 Vet-Akad. Handlinger, vol. 21, no. 5, p. 354, pi. 16, fig. 1-3, 1889. 

 — Stockholm. — Cheveaux — Results Campagnes Scientifiques du 

 Monaco, Fase. 16, p. 136, 1900. 



Family: CAPRELLIDAE. 



Genus : CAPEELLA Lamarck, 1818. 

 Caprella geometrica Say. 



Plate 80. 



Name : Given because of a fancied similarity in the movements of 

 this Amphipod to those of the larvae of the Geometridae (a family of 



