CANCROIDEA. 



203 



valde armati et dorsum densd pilosi, tarso infra supraque spinoso et 

 infra ad medium duo penecilla setarum ferente. 



Carapax very convex, baecato-tuberculous, the tubercles large pisi- 

 form; front between outer antennae two-lobed, lobes prominent; 

 lateral and anterolateral margin 13-14-denticulate. Anterior feet 

 tubereulate, hand short, moveable finger spino-tuberculate. Fol- 

 lowing four pairs of feet compressed, strongly armed, and .above 

 densely pilose, tarsus above and below spinous, and having below, 

 near middle, two tufts of setae. 



Plate 10, fig. 4 a, carapax, coloured to show the relation of the 

 tubercles to the areolets; b, leg of fourth pair; c, hand, first pair, left 

 side, natural size; d, abdomen, natural size, 



Upolu, Samoan Islands, Pacific Ocean. 



Length of carapax, one inch one and a half lines; breadth, one 

 inch and seven lines; ratio of length to breadth, 1:1-4; length of 

 hand, about ten lines ; of carpus, six lines. 



The relation of the tubercles to the normal areolets is shown in the 

 figure. 2 F consists of two tubercles placed transversely; 1 M of one 

 tubercle; 2 M of seven in two longitudinal rows, the inner of three, 

 the outer of four; 1L of one ; 2 L of two; 3 L and 4 L each of one; 

 5 L of three ; 6 L of three, one of them much smaller than the others. 



The teeth of the margin are increased beyond the number five by in- 

 termediate teeth, which are a little smaller than the others, and also by 

 a prolongation of the dentate margin backward. In the intervals D, E, 

 and E, N, there is one intermediate tooth, and in the interval N, T, 

 and T, S, two intermediate each, so that the teeth are as follows, 

 representing the supernumerary by dots, D . E . N . . T . . S. 



Beyond S, posteriorly there are two prominent teeth, the first of 

 which is separated from S by two denticulations ; but these teeth are 

 proper tubercles, and the line is continued backward, upon the surface 

 by two or three tubercles. The upper margin of the hand consists 

 of four large tubercles ; and the outer surface has the tubercles short 

 conical and seriate. The tarsus has two dorsal rows of spines, two or 

 three in a series often on the outer surface, and two or three on the 

 inferior side. The preceding joint is hardly longer than broad. The 



