192 



CHIEOPTERA 



Skull. — The skull is large, slightly exceeding that of Myotis 

 bechsteinii in length and noticeably surpassing it in breadth and 

 robustness. Its general appearance is the least typically Myotis- 

 like of any European member of the genus, a peculiarity 

 heightened by the crowding of the small premolars and conse- 

 quent shortening of anterior portion of tooth-row. Allowance 

 being made for the great difference in size the skull is not very 

 unlike that of Myotis daubentonii, but the rostrum is relatively 

 shorter and the brain-case broader and more depressed. Sagittal 

 crest barely indicated ; auditory bullae proportionately as in the 

 smaller animal, less inflated than in M. bechsteinii ; lachrymal 

 ridge well developed, its lower extremity separated from lachrymal 

 foramen by an evident notch. 



Teeth. — In form the teeth resemble those of the small Myotis 

 daubentonii ; molars decidedly more robust than those of M. 

 bechsteinii, the width of the crown diminishing much less rapidly 

 toward inner border ; small premolars much crowded, the second 

 barely or not visible from outer side, the diameter of its crown, 

 however, not much less than that of anterior tooth ; upper 

 molars as in M. daubentonii and M. capaccinii ; mandibular teeth 

 with no special peculiarities, the premolars and outer cusps of 

 molars more slender than in M. bechsteinii and M. daubentonii. 



Measurements. — Two adult males from Maastricht, Holland : 

 head and body, 57 and 58; tail, 49 and 51 ; tibia, 19 ■ 8 and 

 20 -2 ; foot, 11 '8 and 12 ; forearm, 43 6 and 44 ; thumb, 9-6 

 and 9 ; third linger, 72 and 77 ; fifth finger, 57 and 62 ; ear 

 from meatus, 17 and 17 ' 2 ; width of ear, 10 - 6 and 11. Two 

 adult females from the same locality : head and body, 60 and 61 ; 

 tail, 47 and 46 ; tibia, 18 and 18 ; foot, 11-4 and 11 ; forearm, 

 44 and 44 ; thumb, 9 and 9 ; third finger, 76 and 75 ; fifth 

 finger, 61 and 60; ear from meatus, 16 • 6 and 17 ; width of ear, 

 11 and 11. For cranial measurements see Table, p. 191. 



Specimens examined. — Six, from the following localities : — 

 Holland : Leyden, 1 ; Maastricht, 4 (U.S.N.M.). 

 Belgium : Near Namur, 1. 



1. Leyden, Holland. Tomes Collection. 7. 1. 1. 501. 



(H. Schlegel.) 

 6 al. Namur, Belgium. Bev. D. B. Lebbe 9. 1. 11. 1. 



(c & p). 



MYOTIS MYOTIS Borkhausen. 



1775. Vespertilio murinus Schreber, Saugthiere, I, p. 165 (Not of Linnaeus, 



1758). 

 1797. Vespertilio myotis Borkhausen, Deutsche Fauna, i, p. 80 (Germany). 

 1797. Vespertilio myosotis B[orkhause]n, Der Zoologe (Compendiose 



Bibliothek gemeinnutzigsten Kenntnisse fur alle Stande, pt. xxi), 



Heft v-vin, p. 46 (Germany). 

 1800. Vespertilio myosotis Bechstein, Pennant's Allgemeine Uebersicht der 



Vierfiissigen Thiere, p. 632 (Germany). 



