32 AMPHIPODA NOKMALIA. 



25. Orchestia dispar. (Plate Y. fig. 5.) 



Orcliestia dispar, Dana, Proe. Amer. Acad. Sei. Host. ii. 203; U.S. 

 Explor. Expecl. p. 878, pi. 59. f. 0. 



" Male. — Coxoc of moderate size, fifth but little shorter than fourth. 

 Inferior antenna; scarcely half ixs long as body, last two joints of 

 base siibequal ; flagcllnm longer than base ; joints hardly oVdong ; 

 setae not longer than half the diameter of the joints. Superior 

 antennae shorter than base of inferior. First pair of gnathopoda 

 having the propodos quite small, broadest at apex, and obhquely 

 truncate, ^vith the apical margin excavate. Propodos of second 

 pair stout, broad, subelliptical, obliquely subtroncate ; palm of 

 propodos a little sinuous, pubescent. First pair of pereiopoda 

 longer than second ; fifth a little shorter than foui-th, and liavhig 

 the meros and carpus stout, very broad, and much compressed ; 

 setae ver}' short, on propodos about as long as semidiameter of the 

 joint. 



" Length six to seven lines. 



" Hab. Sea-shores of Illawan*a, New South "Wales." — Daim. 



26. Orchestia Pickeringii. (Plate V. fig. 6.) 



Orchestia Pickeringii, Dana, U.S. Explor. Erped. p. 882, pi. 59. f. 9. 

 Sthnpsoii, Journ. East. Soc. Nat. Mist. \o\. vi. 



" Male. — Coxae of moderate size, fifth a little shorter than foiu'th. 

 Inferior antennae about half as long as body ; base rather short, 

 flagellum longer than base ; joints oblong ; setae few, not longer 

 than semidiameter of joints. Superior antennae not half as long 

 as base of inferior; flagellum three-jointed. First pair of gna- 

 thopoda very small ; propodos subtriangular, oblong ; apex tnin- 

 cate, broader ; dactylos short. Propodos of second pair very stout, 

 ovate, above and below arcuate, without a tooth or angle below 

 at termination of palm ; palm convex and not excavate, naked, 

 having two veiy low prominences near base of dactylos ; the first 

 rounded and minutely setulous, the second subrectangular. Pro- 

 podos of posterior pereiopoda slender ; setae in six sets on imder 

 side, not longer than haK the diameter of the joint, still shorter on 

 upper side of joint. 



" Length five to six lines." — Dana. 



Hah. Kauai or Oahu (Dana, I. c. p. 1595) ; California (LeConte), 

 Stimpson. 



27. Orcliestia Hawaiensis. (Plate Y. fig. 7.) 



Orchestia Hawaiensis, Dana, U.S. Exjjior. Exped. p. 881, pi. 59. f. 8. 



*' Female. — Coxae rather large, fifth hardly shorter tlian foiu-th. 

 Antennae quite slender ; inferior pair somewhat longer than half 



