jog CRUSTACEA. 



Plate 31, fig. 9, animal, enlarged. 



From the stomach of a Bonito, taken in the Atlantic, off the Cana- 

 ries, lat., 27° north, long., 19° west, Sept. 27, 1838. 



Length, nearly half an inch. Beak straight, not apiculate at apex, 

 but appearing emarginate, the emargination corresponding to the 

 channel above. Carapax behind deeply concave. The hand of first 

 pair of legs not larger in diameter than the carpus or arm. Third 

 pair of legs longest. Last joint of eight posterior legs sharply spinous 

 below. Abdomen oblong-oval. Caudal appendages oblong-elliptical, 

 provided with long plumose setae. 



Tribola pubescens. 



Carapax pubescens, oblongus, subovatus, pone oculos undulatus, rostro 

 lineari, marginibus obsolete^ denticulate-, spatiis inter rostrum et 

 cuspides externas angustis. Pedes antici rostrum paulo superantes, 

 angusti, manu dextrd non latiore quam carpus, octo sequentes fere 

 duplo longiores, secundi tertiis breviores. 



Carapax pubescent, oblong, subovate, undulate behind the eyes, beak 

 narrow linear, margins obsoletely denticulate, spaces either side 

 quite narrow. Anterior feet extending a little beyond apex of beak, 

 narrow, rough linear, not stouter than preceding part ; eight follow- 

 ing feet nearly twice as long as anterior pair, second pair shorter 

 than third. 



Plate 31, fig. 10 a, animal, enlarged ; b, beak ; c, left hand. 



Pacific, at Carlshoff and Peacock Islands, in the Paumotus. Col- 

 lected September, 1839, in shallow waters along shores, often under 

 stones. 



Length, between two and three lines ; ratio of length to breadth of 

 carapax, as 1*4 :1. Colourless; transparent. The linear beak has a 



