GAMMARIDEA. 885 



Body much compressed, epimerals very large. Superior antennae a 

 little shorter than base of inferior, flagellum fourteen-jointed, nearly 

 twice longer than base. Inferior antennae hardly half as long as 

 tbe body, rather stout, subpediform, base very long, four times as 

 long as flagellum, its last three joints subequal, flagellum eight to 

 ten-jointed. Hand of first pair of feet but slightly oblong, a little 

 narrower at base, apex somewhat obliquely truncate, and a little 

 excavate. Hand of second pair large subovate, palm on under side 

 straight, nearly naked. Fifth, sixth, and seventh pairs of legs gra- 

 dually increase in length, setae- sparse and very minute, hardly one- 

 fourth as long as the breadth of the fifth joint. 



Plate 60, fig. 1 a, animal, enlarged ; b, mandible ; c, d, first and 

 second pairs of maxillae ; e, maxillipeds ; /, flagellum of inferior pair 

 of antennae ; g, part of same of superior ; A, extremity of leg of sixth 

 pair ; i, posterior stylet. 



Shores of Illawarra, New South Wales. 



Length, seven to eight lines. Head oblong, much exceeding in 

 length the first thoracic segment. Eye round. The epimerals very 

 broad, and the anterior usually conceals the mouth in a lateral view; 

 fifth very short. The superior antennae are three-fourths or two- 

 thirds as long as the inferior, the basal portion is about as long (or 

 nearly) as first two basal joints of inferior pair. The flagellum of the 

 inferior pair is not longer than last joint of base. The finger of the 

 first pair of legs is not longer than apical margin of hand; the inferior 

 margin of the hand is about as long as the breadth of the hand; the pre- 

 ceding joint is sub triangular. The hands of the second pair are equal, 

 the finger extends, when closed, about two-thirds the way to the base 

 of the hand, and there is no proper emargination and but a slight 

 depression where the finger terminates. The tarsi of the following, 

 legs have an exceedingly short seta below. The setae of the joints are 

 confined mostly to the under side of the leg, and wholly so on the fifth 

 joint. The maxillipeds have the terminal joints flattened and broad; 

 the penult joint is very broad at apex, somewhat excavate, and towards 

 the outer side bears a large, stout claw or spine. The posterior stylets 

 have a single very short branch. 



Allorchestes compressa, Dana, Proc. Amer. Acad. Sci., Boston, ii. 205. 



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