DAUBENTON'S, OR THE WATER BAT 143 



gent, the outer slightly outwards, the inner inwards. The 

 two anterior upper premolars are small, especially the central, 

 which is often minute and crowded out of the tooth row 

 internally. The last upper molar is rather less in section 

 than half the second. The lower outer incisors are much 

 larger than the inner. The lower premolars follow the relative 

 proportions of the three upper, but the central, although the 

 smallest, is rarely so minute as the corresponding tooth in 

 the upper jaw. 



Group Leuconoe : — Myotis, as shown in extra- British species, 

 forms an unwieldy and heterogeneous assemblage, which is 

 certain - to be subdivided as the relationships of the bats 

 included within it become better known. 



The first subdivision to suggest itself is that of which M. 

 daubentoni is the sole British representative, and the members 

 of which are characterised by their large feet. This character 

 in daubentoni, sufficiently evident as it is, reaches an extreme of 

 development in ricketi of Thomas. For these bats the name 

 Leuconoe, first used by Boie in 1830, is conveniently available, 

 but, unfortunately, the sharp definition of the group is destroyed 

 by certain exotic intergrading forms, and thus cannot be upheld 

 on careful analysis of the dimensions even of British species 

 alone. The small ciliated interfemoral of M. nattereti is a more 

 distinct character. 



DAUBENTON'S, OR THE WATER BAT. 

 MYOTIS DAUBENTONI (Kuhl). 



1819. Vespertilio daubentoni, Heinrich Kuhl, Neue Ann. der Wetterauischen 

 Gesellschaft fiir die gesammie Naturkunde, i., ii., 19S, pi. xxv., fig. 2 ; described from 

 Leisler's MSS. from Hanau, Germany ; Bell (ed. i) ; MacGillivray ; Blasius ; Cler- 

 mont ; Fatio ; Bell (ed. 2) ; Dobson ; Blanford ; Flower and Lydekker ; Lydekker. 



1828. Vespertilio emarginatus, John Fleming, British Animals, 6; Jenyns; 

 not V. emarginatus of Geoffroy. 



1830. Leuconoe daubentoni, Friedrich Boie, Oken's Isis (Jena), 256-257. 



1839. Vespertilio ^EDILIS, Leonard Jenyns, Ann. Nat. Hist., iii., 73, pi. iii., April ; 

 described from an albinic variety, from Auckland St Andrew, Durham, England. 



1840? Vespertilio VOLGENSIS (? species), Eduardo Eversmann, Bull. Soc. Impiriale 

 des Nat. de Moscou, i., 24 j described from Des Kasanischen und Nisch nigoro- 

 dischen Gouvernment, und im Uralgebirge ; placed here by Dobson, 1878. 



1844. Vespertilio pellucens, J. Crespon, Faune Mdridionale, i, 16; vide 

 Trouessart, Bull, de la Soc. d' Etude des Sci. Nat. de Nimes, 7, i., 35-39, 1879; 

 described from Nimes, France. 



