120 



MR. K. ANDERSEN ON BATS 



[May 16, 



between these two Ethiopian species, viz. a broad horse-shoe in 

 deckeni and a narrow one in augur, we have a parallel inferrwfn' 

 eqtmnwi : a bi^oad horse-shoe in nippoii and tragaius, a narrow 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 ferrum-eqiiinum ; all of them 

 have retained the short tail ; nippon (which, so far as the 

 dentition is concerned, has remained on a relatively less advanced 

 stage) leads through tragatus to regulus, in which the dentition 

 has reached the highest stage of development found in any race 

 of ferrimi- equimmi . 



According to this the mutual affinities of the species of the 

 sim2)lex group might be expressed as follows f (the Ethiopian 

 species are marked with an asterisk) : — 



^cniffur. 



*deckeni. 



acrotis. 



megaphyllus. 



{lepidus-g\:o\yp.)<- 



each other at base; in ^ jp" is half in rotv. To this latter I find no parallel in anv 

 specnnen of ferrum-equimmi (all races) I have seen, and in 4 skulls only, out of 33, 

 tliere is a more or less distinct remnant of the interspace between the canine and p*. 

 Of Bh. deckeni I have seen one skull only j the dentition is as in many specimens 

 oiWi. augur ; c and p"* separated, p2 external, 

 t I give the diagram the form of a genealogical tree, only because it is convenient to 



