Boone, Crustacea, Cruise of "Alva," 1931 91 



Carpilius lividus Gibbes, Proe. Amer, Assoc, vol. Ill, p. 174, 1850; 

 young adult. — Miers, Ann. Mag. Nat. Hist. ser. 5, vol. II, p. 407, 

 1878 ; young adult. 



Genus : CAEPILODES Dana. 

 Carpilodes rugatus (Latreille). 



Plate 46. 



Type : The type of this species came from the Indian Ocean and is 

 deposited in the Paris Museum. 



Distribution: Indian Ocean, (H. M. Edwards) ; China Sea; New 

 Caledonia; seas of Asia and Oceania, very rare, (A. M. Edwards) ; 

 Red Sea; Daedalus Shoal; Sudanese Red Sea, (Laurie) ; Red Sea, sev- 

 eral stations, (Balss) ; Galle and Ceylon, (Miers) ; Cocos Islands, 

 Andamans group, (Aleock) ; Nuka Hiva, Marquesas Islands, (Boone). 



Material examined : One female, taken from coral reef at Anaho 

 Bay, Nuka Hiva Island, Marquesas Islands, August 10, 1931, by the 

 ''Alva." 



Color: Preserved specimen: deep raspberry red, with the tips of 

 the chelipeds and dactyli of the ambulatories pearly white. The liv- 

 ing specimen is reported to be an exquisite deep violet, with the fingers 

 of the chelipeds and dactyli of ambulatories cream-tipped. 



Technical description : Carapace elongate oval, with the rounded 

 sides but little narrowed, the maximum width, across the median cen- 

 ter, about twice the length ; the surface very convex fore and aft and 

 also from side to side and entirely lobulated by deep wide channels. 

 The frontal margin is very much deflected, so that its sinuate border 

 is only visible from a ventral view. The margin consists of two wide, 

 unevenly rounded, submedian lobes, whose outer angle is slightly ac- 

 cented and it is separated by a channel from the narrowed, preorbital 

 angle, which is scarcely as wide as the channel and does not project 

 so far forward as the outer frontal angle. The superior orbital bor- 

 der is tumid and is circumscribed by a channel and cut on the outer 

 half by three closed sinuses, the outermost one being near the outer 

 margin; the postorbital angle is a small, rounded lobe, defined by a 

 channel. The anterolateral border is cut into four lobes separated 

 from each other by deep channels. One of the channels runs trans- 

 versely from the median rostral sulcus, behind the orbit and curving 

 along the contour of the anterolateral border, uniting with the short 

 sulcus between the first and second anterolateral lobes and terminat- 



