38 MR. R. F. TOMES ON BATS FROM S.W. AFRICA. [Jan. 22, 



notice. They are rather ample, thin, and remarkably marked with 

 veins, but are not papillated. The ground-colour is pale yellowish- 

 brown, everywhere strongly marked with veins of a deep brown 

 colour, which are faintest near the body and on the interbrachial 

 membrane : on the interfemoral membrane they are very distinct, 

 not very numerous, and have a transverse disposition ; beneath the 

 humerus they have a tessellated arrangement ; but beneath the fore- 

 arm they are more branched ; whilst between the fingers and at the 

 ends of the wings they are run together, and a dark-brown mottled 

 appearance is produced. The ears and muzzle pale brown ; legs, 

 tail, and wing-bones darkish brown. 



The skull is remarkable for its shortness and great depth in rela- 

 tion to its breadth, and for the almost total absence of ridges or 

 crests. Although the facial line of the cranium makes a near ap- 

 proximation to a straight line, yet the occipital region is so high as 

 to form a facial angle of 48 degrees*. This is due in some degree 

 to the shape of the maxillary bones, the lower or alveolar margins of 

 which curve upwards from the root of the zygoma to the intermaxil- 

 lary bones. Some approach is made to this form of cranium by that 

 of some of the species of Lasiurus, as the L. noveboracensis ; but in 

 that species the facial angle does not exceed 35 degrees*. 



The upper incisors are four in number, very unequal in size, the 

 outer ones being almost rudimentary. The inner ones are of mode- 

 rate size, acute, and with a moderate cingulum, the outer ones very 

 ehort and conical, with an evenly developed and broad cingulum. 

 Canines rather slender and pointed. First and only premolar well 

 developed and of the usual carnassial form ; the three true molars 

 of ordinary form, excepting the hinder one, which is very narrow 

 from front to back, bvit has the usual number of cusps. 



The lower jaw has a less prominent posterior angle than in other 

 species of the genus, but does not otherwise differ materially. The 

 incisors have the usual external trilobed appearance ; but they are 

 thicker from front to back than is usual, and the hinder part is pro- 

 duced into a kind of basal lobe, which has sufficient prominence to 

 have the appearance of a fourth cusp. The canines are rather acute, 

 and have the cingulum produced anteriorly into an acute point, a 

 little above the level of the incisors. The first premolar is small, 

 conical, and with a regular cingulum ; the second somewhat similar, 

 but considerably longer, and it is succeeded by the three true molars, 

 of usual size and proportions, excepting the posterior one, Avhich is 

 rather smaller than usual. 



Dentition: M. ^ ; Can. ^^-J ; Premol. |E^; Mol. g=y. 



tl in It /]/ 



Length of the head and body 2 4 2 3 



of the head 8 9 



of the ears ' 4 4 



Breadth of the ears 4 4 



Length of the tragus 2^ 2^ 



* Taking the lower margin of the maxillary bone as the horizontal or base-line. 



