102 Mr. K. Andersen on some 



In the light o£ the now available much completer material, 

 Dobson's four specimens must be identified as follows : — 

 His " E. franqueti" from Sierra Leone (p. 13, " «"), the 

 only one with the third palate-ridge divided in the middle, is 

 a distinct species, E. buettikoferi ; his two other specimens of 

 " E. franqueti " (p. 13, "J" and "c") and the only speci- 

 men referred by him to "E. comptus " are all E. franqueti 

 franqueti. 



II. Third Palate-ridge in E. franqueti and buettikoferi. 



It will be noticed from the above that Dobson's statement 

 that in some individuals of the present genus the third palate- 

 ridge is continued uninterrupted across the palate, in others 

 distinctly divided in the middle, is by no means without 

 foundation in facts. Only the difference is not, as believed 

 by Uobson, a difference between E. comptus and franqueti, 

 which, on the contrary, are but two names of one species, but 

 between E. franqueti (ridge undivided) and E. buettikoferi 

 (ridge divided). The character would be very convenient 

 indeed for a ready discrimination of these two species, if it 

 were absolutely constant. It is so in the large majority of 

 cases ; it is perhaps always so in the case of E. buettikoferi , 

 but individuals of E. franqueti occur, although apparently 

 very larely, in which the ridge is distinctly divided in the 

 middle. 



In p. 104 of the present paper I give a tabular record of the 

 condition of the third palate-ridge in twenty-six skulls of 

 E. franqueti and buettikoferi. A larger number of skulls has 

 been examined, but those tabulated are the only ones in 

 which the palate-ridges have been preserved in sufficiently 

 intact condition. The results are these: — 



(1) The condition of the ridge, whether continuous or 

 divided, is entirely independent of the presence or absence of 

 the outer pair of upper incisors (i 2 ). Dobson's contention 

 that the presence of i 2 -i 2 in adult individuals is associated 

 with a divided third ridge (his E. franqueti) and the absence 

 of those teeth with an undivided ridge (his E. comptus) is 

 clearly untenable. 



(2) The palate-ridges have been examined in twenty-two 

 individuals of E. franqueti, representing both subspecies and 

 localities dotted over nearly the whole area inhabited by the 

 species. In twenty-one of these individuals the third ridge 

 is practically undivided in the middle, either absolutely con- 

 tinuous [indicated in the table by the word " Undivided/'' 



