Descriptions of East Asiatic Mammals 107 
The Royal Horseshoe Bat, R. rex, somewhat larger than 
R. coelophyllns, has the "cup" very large, twice as wide as the 
greatly broadened sella. The posterior noseleaf is very low. 
R. rex is a highly peculiar species with very large ears and nose- 
leaf. It is known only from Szechwan. The length of the fore- 
arm is 2% inches. 
The Trefoil Horseshoe Bats, R. trifoliatus, are moderate- 
sized Bats with a very high, narrow posterior noseleaf and with 
a pair of small lappets, often in-folded, on either side of the 
base of the sella. The noseleaves and other parts of the body are 
weakly pigmented. The upper incisors are minute. The Trefoil 
Bat, so named from the trefoil shape of the sella with its pair 
of lappets, is chiefly a species of the Sunda Islands. It occurs 
also in the Malay Peninsula and Siam. 
The Woolly Horseshoe Bats, R. luctus, are generally even 
larger Bats than R. trifoliatus, but have similar structure of the 
posterior noseleaf and lateral lappets on the sella. They are 
strongly pigmented with blackish or very dark brown and the 
hairs of the body are somewhat frizzy. The upper incisors are 
large and in contact with each other. The Woolly Horseshoe 
Bats have received a number of regional names : morio from 
Singapore to Siam, perniger from Nepal, northwestern India, 
spurcus from the Island of Hainan, and lanosus from Fukien, 
China, and others. Which of them are valid has not been fully 
determined. The forearm is about 2% inches long. 
THE ROUND-LEAF HORSESHOE BATS 
(SUBFAMILY HIPPOSIDERINjE) 
All the genera belonging to this assemblage are distinguish- 
able from the typical rhinolophs by the absence of the high, 
wedge-shaped posterior noseleaf and the development instead of 
a posterior noseleaf broadly rounded or fan-shaped, which may 
carry on its upper edge various small processes. There may be 
