J HE ANNALS 



AND 



MAGAZINE OF xXATLJUAL UISTOltV. 



[SEVENTH SERIES.] 

 No. 110. FEBRUARY 190 7. 



XIV. — On the B(tff of the Family Megadonnatidte. 

 By Knud ANDiiitsiiX and li. (J. Wroughton'. 



TiiK following note.s aro based on an examination o£ tlie 

 niateiial in the British Museum of Natural History. 



Key to the Genera. 



A. Frontal shield of skull wider in front tlian be- 

 hind. Cusp 2 of »j'* njiich reduced in size or 

 almost entirely dii^appeared. Antero-internal 

 basal cusp of upper canines alwavs distinct. 

 a. ;/■' t present. Prenasal notch of skull rounded 

 posteriorly. (Oriental and .Malayan.) 

 a'. Prenasal notch <if skull sliallower, extending 

 only to level of front of ;«'. Tra<rus loupjer, 

 more slender. Cieneral size smaller 1. Meyaderma. 



* The three cusps forminpr the tips of the W of n typical molar in 

 insectivorous bats are termed, in antero-posterior direction, respectively 

 1, 2, 3; the two cusps forming the base of the W, 4 and r> ; the lingual 

 " heel" of the upper molars, when single, 6, when double, (J and 7 : tee 

 Herluf Wiiifre, " ()m Tattedyrenes 'landskifte, isaer med Hensvn til 

 Taciidernes Former,"' in Vidensk. Meddel. Nalurhist. Furen. Kbhvn.1882, 

 pp. ir>-rj9, pi. iii. (V\'e prefer Winpe's designations to those proposed 

 by Osborn, which, in our oj)inion, are based on an erroneous idea of the 

 8iicces.sion of the cu.-ps, and jiive a mistaken interpretation of the cusps 

 of the lower as compaied with those uf th.' upper molars.) 



t Tiie small anterior upper premolar, 



Ann. cL- Miuj. y. Hist. .Ser. 7. Vol. .\ix. 9 



