CRUSTACEA XORTH PACIFIC EXPLORING EXPEDITION 37 



lateral margin with five teeth, including" the angle of the orbit ; teeth 

 rather prominent, with small, sharp apices ; interspaces granulated. 

 Chelopoda of moderate size, nearly smooth ; upper surface of carpus 

 and hand somewhat rough in the female ; a small tooth at the inner 

 angle of the carpus. Ambulatory feet compressed, and thickly 

 fringed with hair on their edges; terminal joints rough, with spini- 

 form granules, especially on the outer surface. Dimensions of a 

 male: Length of carapax, 0.57; breadth, 0.84; of a female, length, 

 0.64 ; breadth, 0.92 inch. 



It is allied to £. Iccvimanus of Randall and Dana, but is smaller, 

 with the carapax more convex and the ambulatory feet more hairy. 

 In our species the process from the basal joint of the antennae quite 

 reaches the orbit, while in B. Icvvitnaiius this is almost entirely ex- 

 cluded from the orbit. 



Found at Simoda, Japan, under stones and among gravel in the 

 littoral zone. 



Genus CARPILIL'S Leach 



46. CARPILIUS MACULATUS (Linnaeus) Milne Edwards 



Cancer tiiaculatiis Linn^^Jus. 



Carpilins utaciilaliis Milne Edwards, Hist. Nat. des Crust., i, 382; Cuv. R. 

 Anim., pi. xi, fig. 2. Dana, U. S. Exploring Expedition, Crust., i, 160. 



Found at Tahiti. This and some other large kinds of Crustacea 

 are taken by the natives on the reefs at night. The light of a fire 

 placed at the end of a long beam which projects from the bow of the 

 canoe enables the fisherman to see the crabs out on their nocturnal 

 predatory excursions. During the daytime they remain quiescent 

 in their hiding places among the rocks. 



.\ccording to Dana this species occurs also at the Paumotu, Rar- 

 aka, Navigators, and IMiilippine Islands. 



47. CARPILIUS CONVEXUS (Forskal) Ruppell 



Cancer convexits Forskal, Desc. anini., 88. 



Carpilins convcxus Ruppell, Krabben des rothen Mecres, p. 13, pi. in, 



fig. 2. Milne Edwards, Hist. Nat. des Crust., i, 382, pi. xvi, figs. 9, 10. 



Dana. L''. S. Exploring Expedition, Crust., i, 159, pi. vn, fig. 5. 



TIk' coloration is the same in all <»f the numerous specimens col- 

 lected by the expedition, and differs from that re])rcsented in Dana's 

 figure in the deeper hue of the reddish clouds, which also extend to 

 the margin. Tiicre are two consi)icuous deep red l)lotches on the 

 gastric region, which are continent behind and sentl olY a branch on 

 either side reaching to the orbit. .\ red patch on the hand, one on 



