9g4 CRUSTACEA. 



acute. Second pair of stylets extend about as far backward as middle 

 of lamellae of last pair. 



Lestrigonus rubescens. 



Thorax paulo longior, segmento primo fere celato. Caput anticd trun^ 

 catum. Abdominis segmentum ultimum suturd discretum, penultimo 

 parce angustius. Antennae quatuor fere 03quo3, corpore paulo longior es; 

 basis antennarum lmarum ad apicem infsriorem non acutus ; flagel- 

 lum fermb 14:-articulatum, articulo flagelli primo brevi, sequentibus 

 oblongis. Coxa pedum sex posticorum ad apicem posticum fere rectanr 

 gulata et subacuta, et articulus quartus setam antice gerens (pedibus 

 alioque nudis) ; unguis dimidii tarsi longitudine. 



Thorax a little longer than in the preceding, first segment nearly con- 

 cealed. Head flattened in front. Seventh abdominal segment 

 separated by a suture from the sixth, sparingly narrower. An- 

 tennae four, very nearly equal, a little longer than the body, base of 

 the superior antennae not acute at lower apex, flagellum about 14- 

 jointed, first joint short, the others oblong. Coxa of six posterior 

 feet nearly rectangular and acute at posterior apex, and fourth joint 

 bearing a seta (these feet elsewhere naked) ; claw half as long as 

 tarsus. 



Plate 67, fig. 9 a, animal, enlarged; b, extremity of abdomen. 



Pacific, lat. 18° south, long. 124° west. Collected several indivi- 

 duals, August 7, 1839. 



Length, one-eighth of an inch. Colour, a little reddish in some 

 parts. Coxae of six posterior legs reddish. First joint of flagellum of 

 superior antennae not longer than last of base, other joints of flagellum 

 slender, cylindrical. Last (seventh) abdominal segment triangular, 

 obtuse. Two setae on inferior side of fourth joint of fourth pair of legs. 

 Fifth, sixth, and seventh pairs of legs very nearly equal. 



