24 Bulletin Vanderbilt Marine Museum, Vol. VI 



It has been recorded from the following places: Natal, S. 

 Africa, in Nerite plicata (Krauss) ; Mauritius: Grand Port (Bou- 

 vier) ; Mauritius and Seychelles Islands (Richters) ; Diego Garcia 

 (Balss) ; Salomon, Chagos (Laurie) ; Manadu, Addu, Maldives; 

 Minikoi (Borradaile) ; Laccadives : Subhelipar (Alcock, Hender- 

 son) ; Rodriguez Island (Miers) ; South Seas (Ortmann) ; Loo 

 Choo Islands (Stimpson) ; New Ireland (H. M. Edwards) ; Ellice 

 Islands : Funafuti Atoll, abundant in pools of the outer reef ; en- 

 cased in eight different kinds of mollusks (Whitelegge) ; Funafuti 

 (Borradaile) ; Rotuma (Borradaile) ; Fiji Archipelago (Boone) ; 

 Hawaiian Islands (Dana, Randall) ; Oahu, Sandwich Islands 

 (Owen) ; Laysan Island (Lenz) ; Marcus Island (Bryan) ; Wake 

 Island (Dana) ; Palmyra and Fanning Islands (Edmondson) ; 

 Tahiti, Society Islands (Heller, Boone) ; Paumotu Islands; Man- 

 gareva Island, Gambler Islands (Nobili). 



Material examined : Four specimens taken on Venus Point 

 Reef, Tahiti, Society Islands, August 15, 1931. One specimen, 

 Bora Bora, Society Islands. One specimen, Suva, Vitu Levu, Fiji 

 Islands, September 9, 1931. 



This species may be distinguished from Calcinus herbstii by 

 the following characteristics: The eyestalks are slenderer and 

 longer, being one and one-third times the width of the frontal mar- 

 gin of the carapace. 



The antennal acicule, with both margins spinose, extends above 

 the base of the last peduncular joint of the antennae ; the flagellum 

 is only four-fifths as long as the carapace. The antennular pe- 

 duncle is four-fifths as long as the eyestalks. 



The inequality of size is not so great between the chelipeds, the 

 larger, or left one, being less massive than that of C. herbstii; the 

 merus has both inferior margins serrate and a few spines on the 

 distal border; the carpus has the oblique groove of the proximal 

 upper surface broader but less decisive, and there are numerous 

 coarse granules on the upper, inner and distal borders of the cara- 

 pace ; the propodus has the upper and especially the lower border 

 set abundantly with small, low, rounded, pearly granules; these 

 granules are larger on the lower border and pave the region ad- 

 jacent to the fingers. The fingers meet only at the tips and are 

 thickly beset on their upper, outer and lower surfaces with num- 

 erous pearly granules. The smaller right cheliped has the upper 



