120 MR. K, ANDERSEN ON BATS [May 16, 
between these two Ethiopian species, viz. a broad horse-shoe in 
deckent and a narrow one in augur, we have a parallel in ferru- 
eguinum: a broad horse-shoe in nippon and tragatus, a narvew one 
in the other races. The western branch spread over South and 
Central Europe: the dentition slightly more advanced, the tail 
lengthened. The third branch is now represented by what I 
have called the Eastern races of ferrwm-equinum; all of them 
have retained the short tail; mippon (which, so far as the 
dentition is concerned, has remained on a relatively less advanced 
stage) leads through fragatus to regulus, in which the dentition 
has reached the highest stage of development found in any race 
of ferrum-equinum. 
According to this the mutual affinities of the species of the 
simplex group might be expressed as follows? (the Ethiopian 
species are marked with an asterisk) :— 
*deckeni. 
— 
SUUgur. 
SS 
\ eee nen. *acrotis. 
*darlingt. 
/ 
/ 
xv. = / 
*clivosus. 
thomasi. 
“capensis. 
wy 
stheno 
SS al | , *denti. 
LOUKT ve / | 
nereis. 
*simulator. 
malayanus. | 
| 
| 
virgo. ~borneensis. 
celebensis. 
NENUS. | 
| 
| 
truncatus. | 
| 
megaphyllus. 
Y 
SS 
eae ol 
| 
| 
O 
(Jepidus-group_)< — 
each other at base; in 4 pis half in row. To this latter I find no parallel in any 
specimen of ferrwm-equinum (all races) I have seen, and in 4 skulls only, out of 33, 
there is a more or less distinct remnant of the interspace between the canine and p‘. 
Of Rh. deckeni I have seen one skull only; the dentition is as in many specimens 
of Rh. augur: c and p! separated, p2 external. 
t I give the diagram the form of a genealogical tree, only because it is convenient to 
