1897.] The Origin of the Galapagos Islands. 865 
the geographical distribution of the Trapeziide, he makes the 
following remarks: “It isa very important fact, that all the 
members of this family are limited to an exceedingly peculiar 
habitat, the coral reefs; only a single species, Quadrella coro- 
nata, is said to occur between pearl-shells in the Panama Bay ; 
but this case is certainly an exceptional one. All the other 
species are known from coral reefs. The Trapeziide are 
especially inhabitants of living corals, and live between the 
network of their fine branches. This mode of life character- 
izes them as typical littoral forms, which are found from the 
tidal zone to the same approximate depth to which the corals 
reach; the greatest depth mentioned is 22 fathoms in Trapezia 
cymodoce (Herbst).” 
I shall now give the geographical distribution of the Trape- 
ziidæ from Ortmann. 
Geographical Distribution of the Decapod Family Trapeziide. 
: Trapezia Latreille 1825. 
1. Trapezia eymodoce (Herbst) 1801. 
Distribution : Probably everywhere in the Indo-Pacific lit- 
toral region, where coral reefs are found, from tide mark to 22 
fathoms; Red Sea; East Africa: Dar-es Salaam; Glorioso, 
Amirante Islands, Seychelles; Maledives; Southern India ; 
Ceylon; Mergui Islands; Singapore; Java; Borneo; Phiiip- 
Pines; Loo Choo Islands; Moluccas; New Guinea; Queens 
land; New Caledonia; Fiji Islands; Tongatabu; Tahiti; 
Marquesas Islands. 
2a. Trapezia ferruginea dentata (Macleay), 1838. » 
Distribution: Sulu Islands; Pelew Islands; Fiji Islands; 
Tongatabu ; Samoa Islands; Tahiti; Paumatu Islands. 
. Trapezia ferruginea Latreille, 1825. 
Distribution: Red Sea; Zanzibar; Mauritius; Seychelles ; 
Ceylon; New Caledonia; Samoa; Tahiti; Marquesas; Sand- 
Wich Islands; Panama Bay: Pearl Islands; Acapulco. 
2c. Trapezia ferruginea guttata Riippel, 1830. 
Distribution: Red Sea; Seychelles; Loo Choo; Fiji; Samoa 
Islands; Tahiti. 
