AMERICAN BATS — ^HANDLE Y 209 



Subsequently, however, Kowalsld (1956, p. 359, pi. 3) figured and 

 described in detail ten maxillary and cranial frgaments which he had 

 compared directly with Kormos' type of P. crassidens. He character- 

 ized P. crassidens as follows: Rostrum broad (much more so than in 

 P. auritus), flattened, and with a median depression; intermaxil- 

 lary notch broad and cordate; palate extends one molar breadth poster- 

 ior to toothrows; lachrymal [and supraorbital! regions not ridged; 

 P^ labiaily broader and less obliquely placed than in P. auritus; molars 

 larger and more massive than in P. auritus; coronoid process of man- 

 dible distinctly pointed; angular process broad and blunt and deflected 

 outward; P3 smaller than Pi; P4 2-rooted, subquadrate in basal cross- 

 section, provided with strong cingulum, and not so high as Mi; M3 

 talonid narrower than trigonid. Also apparent from Kowalski's 

 figures, although not stated in his description are the facts that the 

 braincase bulges dorsally in the parietal region, and the zygomatic 

 ARCH is not expanded IN ITS MIDDLE THIRD (postcrior third missing). 



The characters in larger type relate P. crassidens to the subgenus 

 Corynorhinus, while the shape and 2-rooted condition of P4 show an 

 affinity to the subgenus Plecotus. 



On the basis of these specunens Kowalsld (1956, p. 340) supposed 

 that the North American Corynorhinus might be a relict of the Tegelien 

 Interglacial of Europe (possibly equivalent to the Aftonian Inter- 

 glacial of North America), analogous to the several species of the 

 Tegelien flora, now extinct in Europe but persisting in North America. 



Plecotus abeli Wettstein 



Wettstein (1923, p. 39; 1931, p. 779) described abundant Pleistocene 

 remains from the Drachenhohle m Austria as belonging to a distinct 

 species, Plecotus abeli, averaging slightly smaller than the Recent 

 form and having the cusps of the lower molars not so high and sharp. 

 Kowalski (1956, p. 361), judging from Wettstein's descriptions, ven- 

 tured the opinion that P. abeli was no more than subspecifically 

 distinct from P. auritus. 



Plecotus auritus Linnaeus 



Most of the undoubted remains of Plecotus that have turned up m 

 the Pleistocene and dubiously Upper Pliocene fissure and cave de- 

 posits of Europe have been identified as Plecotus auritus, the Recent 

 species now inhabiting Europe (e.g., see Heller, 1930, p. 154; 1936, 

 p. 112; Kowalski, 1956, p. 361; and Sickenburg, 1939, p. 9). 



Corynorhinus alleganiensis Gidley and Gazin 



Corynorhinus alleganiensis from Cumberland Cave, Md. (Gidley, 

 1913, p. 96; Gidley and Gazin, 1933, p. 345; 1938, p. 12), is the best 



