94 Bulletin Vanderhilt Marine Museum, Vol. V 



Soc. London, Zool. vol. 31, p. 443, 1907-1915.— Balss, H., 

 Denksch. Akad. Wissensch. Wien, Bd. 99, p. 5, 1924. 



Genus : ATERGATIS De Haan. 

 Atergatis floridus (Linne). 



Plates 47 and 48. 



Type: Linnaeus cites Carolina, (probably Caroline Islands?), and 

 East Indian Seas as the localities from which this species was known 

 to him. Amboina, Moluccas, was Rumphius' locality for the species. 



Distribution: Asia, (Linnaeus); Amboina, (Rumphius) ; East 

 Indies, (Herbst) ; Misaki and Sagami, Japan, (Rathbun) ; Oahu, Ha- 

 waiian Isles; Bora Bora, Society Islands, Amboina, Moluccas, (Rath- 

 bun) ; China, (Gee) ; LooChoo Islands, Caspar Straits, (Stimpson) ; 

 Cebu, P. I., on the reefs, (Miers) ; Ternate, KarangboUong, Java, 

 (Miers) ; Pulo Edam, Noordwachter Island, Mergui Archipelago: El- 

 phinstone, Owen and King Islands Bay, (de Man) ; Kaiser Wilhelm's 

 Land, New Guinea; Mascarenes Bay, (Ortmann) ; Paumotu Archi- 

 pelago, Society and Friendly Islands, (Dana) ; Fee Jee Islands, 

 (Dana) ; Upolu, Samoa, (Miers) ; Indian Archipelago, Island of Poulo- 

 Condore, (A. M. Edwards) ; Trincomali, Ceylon, (Muller) ; Ceylon, 

 Andamans, Mergui, Laccadives, Karachi, (Alcock) ; reef, Male, Atoll, 

 Hule, Maldives, (Borradaile) ; Pulau Berhala Island, Straits of Ma- 

 lacca, (de Man) ; Koh Kahdat and Koh Chang, Gulf of Siam, (Rath- 

 bun) ; Singapore, (Walker) ; Monte Bello Islands, (Rathbun) ; Port 

 Dennison, Australia, (Haswell) ; Falcon Island, Palm Islands, Queens- 

 land, (Boone) ; New Australia, New Caledonia, East Africa, (Hender- 

 son) ; mouth of the Umlas River, Natal, and Cape of Good Hope, 

 Africa, (Stebbing). 



Color: Dana's color plate shows the living crab to be a deep green 

 with creamy fine reticulations on the median region of the carapace. 



Technical description: The largest of the ^^Alva" specimens is a 

 male with the carapace 33 mm. long and 50 mm. wide. The entire 

 carapace is convex, of quite smooth texture, but faintly lobuoled, the 

 regions being scarcely delineated by very weak shallow cervical and 

 hepatic grooves. The frontal and anterolateral margins together form 

 a wide semi-circle. The frontal margin is crested, faintly bilaminate, 

 not separated from the rounded orbital angle. The orbits are large, 

 with the long diameter equal to about one-third the width of the 

 frontal border. Three closed sinuses occur on the outer half of the 



