Boone, Crustacea, Cruise of ''Alva," 1931 195 



Celebes, (Schenkel; Rathbun; Alcock) ; Andai, (Nobili) ; Malacca, (de 

 Man) ; Amboina, (Zelmtner) ; Mahe Island; Batjan Timor Laut, (Al- 

 cock) ; Fiji Islands, Kandavu, Matuku, (Alcock) ; Fiji Islands, (de 

 Man) ; Tahiti, (Stimpson; Ortmann) ; Samoa, (de Man) ; common at 

 Fanning Island, less so at Palmyra Island, (Edmondson) ; Mascarenes, 

 (Hoffman) ; Australia, (Kingsley) ; Grand Port, Mauritius, (Bou- 

 vier) ; Mauritius, (Richters) ; mangrove swamp, Praslin, Seychelles, 

 (Borradaile) ; New Caledonia, (Alcock) ; Noumea, New Caledonia, 

 (Boone) ; Rodriguez Island, Nosse-Faly, Nosse-Be, Madagascar, (Al- 

 cock) ; Madagascar, (Hoffman) ; Mozambique, (Hilgendorf) ; Gazi, 

 south of Mombasi, British East Africa, (Bouvier) ; Zanzibar, (Hilgen- 

 dorf; Kingsley) ; Zanzibar, Kokotoni, ebb-tide on sand beach, (Lenz) ; 

 River Zambesi, Durban Bay, Port Natal, (Alcock) ; many at Durban 

 Bay, South Africa, (Stebbing). 



Material examined : Several specimens of both sexes collected at 

 Noumea, New Caledonia, September 19, 1931, by the "Alva." 



Technical description : Carapace box-like, length equal to three- 

 fifths of its greatest width, which occurs from tip to tip of the acute, 

 procurved anterolateral angles ; lateral margins of the dorsum of cara- 

 pace are defined by a fine line for about three-fifths of their length 

 and are moderately convergent; the sidewalls of carapace are high; 

 the posterior margin of the carapace is about one-half as wide as the 

 anterior margin and has a flat carina. The dorsal surface is tumid, 

 glabrous, convex in both directions; the cervical and urogastrie 

 grooves deep ; a groove curving posteriorly and outward from the uro- 

 gastrie bar, vanishing near the lateral margin at a point above the 

 base of the fifth leg. The interorbital border is a very narrow process, 

 tapered distally with the frontal margin rounded, lightly carinate, this 

 carina continuing on the lateral margin of the process and as a very 

 fine double line along the superior orbital margin, which is quite ob- 

 lique and sinuous, being gently convex almost to the anterolateral 

 angle, there becoming briefly concave and confluent with the anterolat- 

 eral tooth. The inferior orbital border is considerably in advance of 

 the superior and is also oblique, convex and very beautifully and regu- 

 larly dentate, these teeth graduatingly increasing in size toward the 

 outer margin. The male belt is seven-segmented, the first and second 

 segments very short, fringe-like, the seventh segment is abruptly nar- 

 rower than the sixth and has its distal margin quite bluntly truncated. 

 The female belt is very wide, subcircular, seven-segmented, the seventh 

 segment abruptly narrower than any of the others. 



