Vol. 50.] FAUNA FROM THE IGHTHAM FISSURE. 193 



Vespertilio ? — Several humeri, and a femur representing a bat 

 intermediate in size between the pipistrella and long-eared bats, 

 are provisionally placed in the genus Vespertilio. 



SeotopJiilus pipistrellus ? (Pipistrella.) — Two small femora and 

 two ulnae, which agree in size with those of S. pipistrellus, are 

 provisionally so named. This species is now living in Aiiddle and 

 Northern Asia as far eastward as Japan, also throughout Europe 

 and Britain as far north as 60°. 



Pkcotus ( Vespertilio) auritus 1 (Long-eared Bat.) — A femur, 

 several humeri, and ulna?, which in size agree with those bones of 

 P. auritus, as well as two lower-jaw rami, somewhat smaller than 

 those of Vespertilio Naltereri, are provisionally referred to this species. 

 It is now living in Europe (including Britain), from Spain and 

 Italy northward to the 60th degree of north latitude in Scandinavia 

 and Russia. In the Alps and the Harz it does not extend higher 

 than the forest region. 



Rodentia. 



Lepus timidus. (Hare.) PI. XI. figs. 4-5. — The bones referred to 

 this species call to mind those from the Somerset Caves, recorded by 

 Mr. W. A. Sanford, 1 which, on account of their larger size, were re- 

 ferred by him to Lepus diluvianus. It seems very doubtful, however, 

 whether L. diluvianus is really a distinct species, and Dr. Woldrich " 

 suggests that it may be only a variety of L. variabilis. The bones 

 from the Ightham fissure, although larger and stouter than those of 

 L. timidus, undoubtedly more nearly resemble the corresponding 

 parts of that species than they do those of L. variabilis. The ilium 

 of L. timidus is much broader proportionately than in L. variabilis • 

 the Ightham specimen is likewise very broad. The femur of L. timi- 

 dus, although absolutely shorter than that of the L. variabilis used 

 for comparison, is stouter in every particular, and has the shaft 

 flattened from above downward. The femur from the Ightham 

 fissure, although as long as that of L. variabilis, has all the propor- 

 tions of L. timidus. The humeri and other bones of these two 

 species bear a similar relation to each other ; and the corresponding 

 fossil bones, which are referred to the present species, in each case 

 similarly agree with L. timidus: these include tibiae, humeri, ulna?, 

 radii, foot-bones, and a pair of lower incisors. Two pieces of ulna? 

 seem to have a nearer resemblance to L. variabilis, but they are not 

 sufficient for identification. Lepus timidus has been recorded from 

 Pleistocene deposits ; it is now living from the north of Russia to 

 the south of Spain and Itaty, and occurs in the southern parts of 

 Sweden ; but, although common in England, is not found in 

 Ireland, where it is replaced by Lepus variabilis. In Scotland 

 both species are found. 



1 Quart. Journ. Geol. Soc. vol. xxvi. (1870) p. 126. 



2 Sitzungsb. d. k. Akad. d. Wissensch. Wien, toI. lxxxii. (1880) p. 11. 



