CRUSTACEA. 

 130 



Peltinia scutiformis. 



Carapax mbsmiifvrmis, paulo Mongus, Ions, rostra vtxkyuw rjuam 

 UUore, Ulobato, angulis antiw-latemhbus valde prcxtncf,*, »et lfJ em, 

 diametroque gastrico maxima, marglne imtero-latendi dcntdmn dwhm 

 obsolescentibus setigeris notato, regione medkmd bt-tuforruhttd. An- 

 tennce external rostra valde long fore*. Ped<* tenure auttvi tuermes, 

 digitis contiguis. 



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

 biJobate; carapax widest in a line across tho stomach, an tero-lateral 

 angles much produced, setigerous, postero-Iateral 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 Kio 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 seta3 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 ilexuous. 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 setse. 



The flagellum of the outer antenna' is not shorter than the two 

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



