REPORT ON THE ASTEROIDEA. 539 
Chorology of the Genus Mithrodia. 
a. Geographical distribution :— 
ATLANTIC: One species between the parallels of 15° and 25° §, 
Mithrodia victoriz, off the Victoria Bank, east coast of Brazil. 
InpIaAN OcEAN : One species between the parallels of 0° and 30° S. 
*Mithrodia clavigera, from Mauritius, and extending into the 
Eastern Archipelago and Pacific. 
EASTERN ARCHIPELAGO: One species between the parallels of 20° N. and 10° S. 
*Mithrodia clavigera, from Java, Flores, and the Moluccas, and 
extending into the Indian Ocean and Pacific. 
Paciric : Two species between the parallels of 30° N. and 30° 8. 
*Mithrodia clavigera, from the Fiji Islands, Samoa Islands, Tahiti, 
and Sandwich Islands, and extending into the Eastern Archipelago 
and Indian Ocean. Mithrodia bradleyz, from the western coast of 
the American continent, extending from California to Panama. 
8. Bathymetrical range: Shallow water to 39 fathoms. 
y. Nature of the Sea-bottom: Mithrodia clavigera on coral reefs; Mithrodia victori# 
on dead coral ; Mithrodia bradley on rocks. 
The species collected by the Challenger is indicated by an asterisk in the above list. 
Chorological Synopsis of the Species. 
Ocean, | Range in Fathoms. | Nature of the Sea-bottom. 
| 
Mithrodia bradleyi . =i) Eacifie; | Shallow water. Rocks. 
age ; 5 Indian, Eastern Archi-)! 4 
| Mithrodia clavigera . : { pelago, and Pacific, } Shallow water. | Coral reefs. 
Mithrodia victoriz . . | Atlantic. | 39 | Dead coral. 
| | 
1. Mithrodia clavigera (Lamarck), Perrier. 
Asterias clavigera, Lamarck, 1816, Hist. nat. anim. s. vert., t. i. p. 562. 
Mithrodia spinulosa, Gray, 1840, Ann. and Mag. Nat, Hist., vol. vi. p. 288. 
Ophidiaster echinulatus, Miiller and Troschel, 1842, System der Asteriden, p. 32. 
Heresaster papillosus, Michelin, 1844, Revue Zoologique, p. 173; Mag. de Zool., 1845, p. 19, pl. ix. 
Echinaster echinulatus, v. Martens, 1866, Archiv f. Naturgesch, Jahrg. xxxii. Bd. i. p. 59. 
Mithrodia echinulata, Liitken, 1871, Videnskab. Medd. natur. Foren. i Kjgbenhavn, p. 266. 
Mithrodia clavigera, Perrier, 1875, Révis. Stell, Mus., p. 114 (Archives de Zool. expér., t. iv. p. 378). 
Locality.—Kandavu, Fiji Islands. On the reefs. 
