1905. | OF THE GENUS RHINOLOPHUS. 101 
longer than in rouwi, 7.e. more than 13 the length of IIT.’ 
(cf. neveis and stheno). V. is extremely short. 
Colour. To judge from specimens preserved in alcohol, probably 
not far from being the same as in the dark phase of Nepal examples 
of Rh. roux. 
Skull. The essential characters are as in rouat, thus proving 
Rh. thomasi to be an offshoot from that type of Bat, not (as might 
very well be supposed, in view of the short metacarpals) from 
borneensis. The skull of Rh. thomasi agrees with that of rowat im 
the broad brain-ease ; it differs from rowxt in the much smaller 
size. Compared with borneensis, the skull of 2h. thomast 18 as 
small ag in the smallest individuals I have seen of borneensis (even 
as small as in malayanus), but the brain-case is markedly broader, 
even broader than in the largest bormeensis, and the supraorbital 
length is exceedingly short (¢/. measurements, p. 100). 
Dentition. p, external; p, and p, in contact; p* external, 
Upper canine and p* in contact. Both of the specimens examined 
are identical in dentition. 
Measurements. On p. 100. 
Type. 2 ad, (in alcohol). Karin Hills, Burma, 1888. Collected 
by Signor Leonardo Fea. Presented by Marquis G. Doria. Brit. 
Mus. no. 90.4.7.10. 
I venture to connect with this fine species the name of 
Mr. Oldfield Thomas, who already thirteen years ago (J. s. ¢.) 
pointed out that it could scarcely be identified with any hitherto 
known form, but refrained from describing it as new, owing to 
the general confused state of this group of Bats. 
13. Ruronopuus arrints Horsf. (Plate HT. figs. 11-13.) 
Diagnosis. Sella pandurate. p° in the tooth-row. Forearm 
50-56 mm. 
Details. This species marks an important progress in develop- 
ment as compared with 2h. rowwi. It is the base of the ferrum- 
equinum section. 
The chief modifications are four: in the shape of the sella; in 
the structure of the wings; in the size of the animal; in the 
shortening of the palatal bridge. 
In the borneensis-rouwi type the sella is practically parallel- 
margined; in afinis it is pandurate, %. ¢. the lateral margins 
concave, as in ferrum-equinum, though generally to a slightly 
less degree. In simplex and its closest relations the lancet 
is almost cuneate; in borneensis there is a tendency towards 
emargination of the lateral margins; in rows this tendency is 
carried to an extreme ; in afinis the lancet falls back to the former 
stage : it is almost cuneate. E 
Throughout the whole series of forms reviewed above, with the 
exception of the somewhat aberrant Rh. nereis, stheno, and thomas, 
the wings have remained at the same primitive stage : no length- 
ening of the second phalanx of the third finger. In affinis this 
phalanx has considerably increased in length, being always more 
