CANCROIDEA. 255 



2. Latera carapacis dente armata. 



TRAPEZIA RUFO-PUNCTATA (Herbst), Latr. 



From dentibus sex magnis subacutis armatus, spimda lateris acuta. 

 Pedes antici subcequi, carpo intus valde acuto, articulo tertio apicem 

 internum acuto, incurvato, marginem internum acute serrate, serraturis 

 grandibus subcequis. Pedes 8 postici paulo pubescentes, articulo tertio 

 parce crasso, quinto sat angustiore. Abdomen maris 7 '-articulatum, 

 segmento secundo angustiore, tertio quartoque latioribus, reliquis decres- 

 centibus, ultimo rotwidato, breviore quam precedents. 



Front armed with six large, prominent teeth. Lateral spine acute. 

 Anterior feet subequal, third joint or arm acutely projecting, and 

 incurved at inner apex, and inner margin with a few large, sharp 

 serratures. Eight posterior feet somewhat pubescent, third joint 

 rather stout, the fifth considerably narrower. Abdomen of male 

 seven-jointed, second segment narrower, third and fourth broader, 

 the rest decreasing in width, the last rounded at apex, shorter than 

 preceding. 



Plate 15, fig. 3 a, animal, enlarged; b, male abdomen. 

 From outer reef of Tahiti, among branches of coral. 



Length of carapax, six lines; breadth, seven lines. Colour ivory 

 white, or a pale flesh tint, with quite large carmine spots rather 

 thickly scattered ; legs like carapax. Between the orbits, just back 

 of front margin, there are in a row, six spots ; in the three or four 

 following rows, there is a spot on the medial line ; but the rows are 

 not regular, especially over the posterior part of the carapax. Length 

 of third joint of posterior legs, two and one-half times its greatest 

 breadth. Claw, smoky yellow ; a slight tinge of red in the hand. The 

 spots of colour are much larger than in the ru/o-punctata of Herbst, 

 but the teeth of the anterior margin are so similar to those of his 

 species, that we believe our species identical with his. The inner 

 two teeth of the front margin are separated by a rounded concavity, 



