130 CRUSTACEA. 



PELTINIA SCUTIFORMIS. 



Carapax subscutiformis, paulo oblongus, Icevis, rostro vix longiore quam 

 latiore, bilobato, angulis antico-lateralibus valde products, setigeris, 

 diametroqw gastrico maxima, margine postero-laterali dentilws duobus 

 obsolescentibus setigeris notato, regione mediand bi-luberculatd. An- 

 tennae externce rostro valde longiores. Pedes tenucs, antici inclines, 

 digitis contiguis. 



Subscutiforrn, a little oblong, smooth ; beak hardly longer than broad, 

 bilobate; carapax widest in a line across the stomach, antero-lateral 

 angles much produced, setigerous, postero-lateral margin with two 

 obsolescent setigerous teeth, medial region minutely bi-tuberculate. 

 Outer antenna? projecting much beyond the beak. Feet slender; 

 second pair longest; first pair unarmed, fingers contiguous. 



Plate 5, fig. 7 a, male, enlarged six diameters ; b, under view of 

 head ; c, hand. 



Bay of Rio Janeiro. 



Length, two lines. Colour ochreous yellow; legs flesh-red; a narrow 

 longitudinal spot with rectilinear outline, near middle of back, having 

 a light yellow colour; two setae just anterior to this spot; one or more 

 near middle of posterior margin, and another over the base of poste- 

 rior legs. The surface of the carapax is somewhat flexuous. The 

 carapax may be considered as consisting of three parts : the rostral, 

 the orbital, and the thoracic part. The rostral part of the carapax is 

 about half as wide as the orbital, and the orbital a little more than 

 half the width of the thoracic. A narrow transverse line between 

 the two latter portions, had a light yellow colour, and the gradual 

 slope between the two portions appeared, owing to this colour, to be 

 an abrupt descent. The two minute tubercles of the medial region 

 are situated just posterior to the line between these parts of the cara- 

 pax. The beak is furnished with setae. 



The flagellum of the outer antennae is not shorter than the two 

 preceding basal joints. The male abdomen is narrow; from the 



