GRAPSOIDEA. 



Island of Madeira; Cape Yerds; San Lorenzo, Peru; Yincennes, 

 and other islands of Paumotu Archipelago ; Sandwich Islands. 



We have given a figure of the outer maxillipeds for comparison 

 with the same organs in the Q. cruentatm. The approximation is so 

 close, that on this ground, only the smallest specific distinction could 

 be drawn. In this species the vertical front is about twice as long as 

 its height. The bend in the front of the carapax takes place at the 

 front margin of the prsemeclial areolets, and the projecting lobes are 

 the fronts of these areolets ; in the specimens from Madeira they are 

 nearly entire. Length of front, seven lines ; height, three lines. In 

 young specimens the front is less vertical, being inclined at about 

 120°, and there is something of a crest on the epistome either side ;" 

 the hand also is smoother outside, and the lower apex of the third 

 joint of the third and fourth pairs of legs is but two-toothed. Such 

 are specimens from the Sandwich Islands. 



In a large specimen from San Lorenzo, the third joint of the eight 

 posterior legs enlarges towards the apex, where it is broadest, instead of 

 being broadest about the middle, as in the common variety of the pictus. 

 The front is quite vertical, and hardly twice as long as it is high, and 

 rather broader above than below. The front of the praemedial areo- 

 lets, either side of the middle, is two or three-dentate. The process 

 separating the orbit from the antennae is much elongated, so as to 

 reach quite as far forward as the front. Both this and the preceding 

 have the lower apex of the third joint of the posterior legs entire 

 and rounded. The hand has the costa near lower side made up of 

 granules. 



Length of carapax, two and a half inches ; breadth, two and three- 

 fourths inches; ratio, 1 :11; length of front (across middle), twelve 

 lines ; height of front, five and a half lines. 



The colours vary between deep brownish black and orange-yellow, 

 in irregular transverse lines, much interrupted. They are more 

 finely broken up in the Madeira specimens than in those of Peru. 



Grapsus pictus, Latr. ; Hist. Crust., vi. 69 ; Edwards, Crust., ii. 86, and Cuv., pi. 

 22, f. 1. 



Goniopsis p ictus, De Haan, Fauna Japonica, 33. 



85 



