144 Bulletin Vanderbilt Marine Museum, Vol. V 



Genus: CYMO De Haan. 

 Cymo melanodactylus De Haan, 



Plate 74. 



Type : This came from Japan and was deposited in the Berlin Mu- 

 seum. 



Distribution: Japan, (De Haan); Liu Kiu Islands, Amami 

 Oshima, Japan, (Ortmann) ; Liu Kiu Islands, (Balss) ; Hong Kong 

 and Bonin Islands, in corals, (Stimpson) ; Hongkong, (Gee) ; Indo- 

 Paeific, two stations, Andamans, Mergui, Ceylon, (Aleock) ; Sullivan 

 Island, Mergui Archipelago, (de Man); Maldives: shore in Minikoi 

 and Goifurfehendu atolls, (Borradaile) ; Feejee Islands, (Dana) ; 

 Koh Kahdat, Gulf of Siam, (Rathbun) ; Samoa, (Ortmann; Miers, 

 Pesta) ; Tahiti, (Pesta) ; Society Islands, (Boone) ; Funafuti, Rotuma, 

 (Borradaile) ; Paumotu Islands, and Society Islands, (Rathbun) ; 

 Palmyra Island, Fanning Island, (Edmondson) ; Torres Straits, (Cai- 

 man) ; Ingram Island, reef, Queensland, Australia, (Boone) ; Sey- 

 chelles, (Miers) ; Coetivy Island, (Rathbun) ; New Caledonia, (A. M. 

 Edwards) ; Chaland, Mauritius, (Bouvier) ; Red Sea, El Tor and Gulf 

 of Suez, (Miers) ; Red Sea, (Nobili; Pesta). 



Material examined : Five specimens, three male, and two female, 

 taken on Venus Point Reef, Tahiti, South Pacific Ocean, August 15, 

 1931. One larger specimen taken in coral, on Ingram Island Reef, 

 Queensland, Australia, October 12, 1931. This specimen is less spinose 

 than those from Tahiti. 



Technical description : This is a small species, specimens only a 

 half inch in diameter being the largest so far recorded. The ''Alva" 

 specimens are not quite that large. 



The carapace is subcircular, moderately convex, with the regions 

 scarcely delineated, with the frontal and anterolateral margins widely 

 rounded, the postlateral margins not separated from the anterolateral, 

 but convergent posteriorly, giving the posterior portion a narrowed 

 aspect. The frontal margin is equal to about half the diameter of the 

 carapace, and has six rather equal, small, spinelike teeth and in addi- 

 tion there is a smaller similar spinelike tooth, on each side at the inner 

 orbital angle. On the anterolateral margin, there are two or three 

 similar smaller spines, and in addition, one or more coarse, rounded 

 granules on the hepatic region. There are also some of these granules 

 scattered on the mesogastric and other branchial regions, semiconeealed 

 by the bushy pubescence. There are also some of these tubercles on 



