58 



MlTYLIA GERRARDI. (PI. XIII.) 



Black ; sides with a series of short white perpendicular bands ; 

 underside white, with a black spot in the middle of each scale, a 

 white oblong four-sided spot over the base of the caudal rugosity ; 

 subcaudal scales few, with a small black spot in the centre of each. 



Hab. Ceylon. 



The form of the head agrees with the genus Rhinophis of Wagler ; 

 but it differs from that genus in the shortness, and especially in the 

 structure, of the caudal shield, which, in that genus, is formed of a 

 single horny conical plate. 



2. Notice of the Bosch Vark (Potamochgerus africanus), 



LIVING IN THE GARDENS OF THE SOCIETY. By Dr. J. E. 



Gray, F.R.S., V.P.Z.S., etc. 



(Mammalia, PI. LIX.) 



It was with great pleasure I was able to examine a living specimen 

 of the Bosch Vark from the Cape of Good Hope, as some zoologists 

 who had lived at the Cape had expressed to me a doubt as to the 

 distinctness of the Painted Pig of the Camaroons from the Bosch 

 Vark of the Cape, which they informed me is apt to vary in co- 

 louring, being sometimes fulvous. 



Any one who examines the two living animals as they are now 

 placed, in two paddocks side by side in the Gardens, must at once 

 be satisfied of the distinctness of the species of the two animals, 

 quite independent of any variation that may occur in the ground 

 colour of the individuals, and at the same time be convinced of their 

 distinctness from the other pig and of their alliance to each other. 

 Their differences may be thus stated in parallel columns : — 



P. africanus, S. Africa. P. penicillatus, W. Africa. 



The hair very long, blackish. The hair short, adpressed, 



deep red. 



The nuchal crest very large, The nuchal crest small, low, 



bushy, and extending over the white, forming a narrow line, 

 shoulder. 



Tail slender, placed rather high Tail very thick, placed very 



up. high up in the haunches. 



The ears moderate, rather The ears large, elongate, nar- 



broad, with a small pencil at the row, with a large terminal pencil, 

 tip. 



These descriptions were taken at the same time of the year. 



The two sexes of the two species are similarly coloured and agree 

 in the above characters. There are also several other distinctive 

 characters not so easily described. 



