412 THE VOYAGE OF H.M.S. CHALLENGER. 
genus conceived by Miller and Troschel, and there is consequently no excuse on the 
ground of long established usage to set against the duty of restoring Gray’s name of 
Nardoa. It is a simple act of justice, which cannot in honesty be passed over, as well as 
a means of keeping before naturalists the name of one whose work is worthy of remem- 
brance. The use of the name in 1862 for a genus of Protozoa is no valid reason in my 
opinion against restoring Nardoa to its original signification. 
Chorology of the Genus Nardoa. 
a. Geographical distribution :— 
InpIAN OcEAN: Four species between the parallels of 30° N. and 30° S. 
Nardoa variolata and Nardoa xgyptiaca, from the Red Sea and 
Mauritius, the former also from Mozambique, Rodriguez, and Ceylon, 
‘and the latter extending into the Pacific. Nardoa galathex, from 
the Nicobar Islands, and extending into the Eastern Archipelago. 
Nardoa nove-caledonie, from Ceylon (fide Bell), and extending 
into the Pacific. 
EasteRN ARCHIPELAGO: Five species between the parallels of 20° N. and 20° S. 
Nardoa galathex, from Togean Island, and extending into the 
Indian Ocean. Nardoa pauciforis, from Flores. Nardoa tuber- 
culata and Nardoa obtusa, from the Philippine Islands. Nardoa 
semiregularis, from Java, and extending into the Pacific. 
Paciric: Five species between the parallels of 40° N. and 30° 8. 
Nardoa xgyptiaca, from the Samoa Islands (also from the Fiji 
Islands and Sandwich Islands, fide Perrier), and extending into the 
Indian Ocean. Nardoa nove-caledonie and Nardoa gomophia, 
from New Caledonia, the former also from Ceylon (fide Bell). 
Nardoa semiregularis, from Japan, and extending into the Eastern 
Archipelago. Nardoa semiseriata, off the southern coast of China. 
8. Bathymetrical range: All the species are confined to shallow water. Nardoa 
senuservata in 40 fathoms. 
y- Nature of the Sea-bottom: Recorded in few instances. Nardoa tuberculata on 
coral reefs. 
Chorological Synopsis of the Species herein mentioned. 
Ocean. Range in Fathoms. Nature of the Sea-bottom. 
Nardoa tuberculata . ; Eastern Archipelago. Shallow water. Coral reefs. 
