, 9 , CRUSTACEA. 



gate, nearly linear, compressed, lower finger pubescent below, 

 carpus oblong, nearly entire. Six following feet naked or nearly 

 so; posterior pair concealed under the carapax. 



Plate 26, fig. 12 a, animal, enlarged eight diameters; b, outer raax- 

 illipeds; c, extremity of abdomen. 



Rio Janeiro, Brazil. 



Length, one and a half lines; breadth, nearly a quarter less than 

 the length. Tarsus much curved and naked. The medial tooth of 

 the front is very slightly the largest, and its sides are not quite even. 

 The carpus has one or two very minute serratures on anterior half of 

 inner margin. The posterior legs were not in sight in any of the 

 specimens. The caudal segment is triangular and nearly equilateral, 

 the length slightly exceeding the breadth at base; the appendages 

 either side are narrow oblong, with the articulation of the pair ad- 

 joining the caudal segment, situated just by the apex of the triangle; 

 and the outer lamella does not reach beyond this articulation. 



5. FRONS 5-7 DENTATUS. 

 PORCELLANA SFINIFRONS, Edirnl'ds. 



Valparaiso, Chili; San Lorenzo, Peru. 



Carapax a little oblong, embossed. Colour, fine brownish red spotted 

 with brownish black; specimens from San Lorenzo vary from deep 

 olive-green to brownish black, with a violet tinge, legs brownish 

 violet. The legs are naked, and the carapax shining, though finely 

 embossed. 



Edwards, Crust., ii. 256. 



PORCELLAXA SCABRICULA . 



Carapax depvessus, parce oblcmgus, transi-ersim levit<-r rwjatv* <t }><utim 

 suhtiliter hirmtus, fronte prominenter latetpie tr'uwguhiiu, ^ij>m wul<* 



