1908.] 



DR. KNUB ANDERSEX ON BATS. 



315 



molars does not give an adequate idea of their true mutual 

 relationships. If, however, we take as the leading character, not 

 the presence or absence of the vanishing m^ and m^, but the 

 smaller or greater development of cusp 7 of m\ all the objections, 

 indicated above, as far as I can see, are removed, and we then 

 arrive at the following scheme : — 



A. Cusp 7 of ml relativelj' small. 

 «. Molars | ; no living species. 



b. Molars f : glaiicus, ivatsuni. 



c. Molars f . 



a. va.' of normal size : cinereus. 

 (3. m^ reduced : rosenhergi. 



B. Cusp 7 of ml large. 



a. Molars §. 



a. Rostrum short : concolor. 



(3. Rostrum normal : ^j7rtJizros^r/s, 7^^rs^«f^(s. 



b. Molars f (species closely allied to 2^lanirostris) : jamaicensis. 



c. Molars | (none of the species closelj^ allied to those of sections B a and B b). 

 a. Rostrum and palate normal : quadrivitfatus, toltemis, fhceotis, astecus. 

 (3. Rostrum unusually flattened, palate shortened ; turpis, nanus. 



Or expressed in the form of a diagram : — 



molars : rosenbergi 



nanus ") 2 

 turpis 3 2 



molars : cinereus 



2 v,„i„ ^ tvatsoni 

 5 molars < , 



3 ( glawcus 



molars : extinct 



aztecus ~] 

 pheeotis ! 2 



toltecus I 2 

 quadrivitfatus J 



planirostris ) ; 

 hirsutus ) ^ 



