148 EINAB LONNBJiRG, MAMMALS COLLECTED BY THE SWEDISH ZOOLOGICAL EXPEDITION ETC. 



or that it prefers to use the right side of the head when butting, but in less degree 

 than for instance G. c. tippelskirchi,'^ and O. c. cottoni.^ A skull of an old bull 

 Giraffe from the Sotik, which I saw in Nairobi and which, I suppose, represented 

 G. c. tippelskircM, had the occipital exostoses and those above the orbit much bigger 

 on the right than on the left side; the right main horn was thicker than the left; 

 and the nasal exostoses were chiefly situated on the right side of the median line. 

 These facts indicates that »right-headedness» is a common feature among Giraffes. 

 The dimensions of the skull of G. c. reticulata are seen in the following table 

 of measurements. If this skull is compared with a skull of G. c. tippelskirchi from 

 Kilimanjaro it will be seen that the main pair of horns and the azygous frontal 

 horn are much better developed in G. c. reticulata. 



Condylobasal length . . . . 



Basal length 



Greatest breadth 



Distance from gnathion to anterior end of nasopremaxillary suture 



» » » to orbit 



» » orbit to hind surface of occipital condyle 



» » gnathion to anterior premolar 



Length of upper molar series 



Breadth of skull across hind end of nasopremaxillary suture . . . 



Height of skull at the same place 



Breadth across bases of main pair of horns 



But on the other hand the nasal exostoses and the supraorbital bosses are much 

 more strongly developed in G. c. tippelskirchi which results in giving it a greater 

 breadth of the skull across the orbit. And the nasal portion of the skull is as well 

 higher as broader than in reticulata as the measurements prove. 



The sperms of the Giraffe have been described for the first time from prepa- 

 rates of this specimen of G. c. reticulata by G. Rbtzius.^ 



This Giraffe was infested by a great number of ticks around the anal opening 

 and around the base of the scrotal sack where the skin is thin. They proved to 

 belong to the species Hyalomma cegyptium (L.)* 



1 Conf. my above quoted paper on this subject. 



^ According to Lydekkee. 



^ GusTAF Betzius: Biol. Untersuchungen N. F. Bd. XVI. Stockholm 1911. 



* Conf. L. G. Neumann: Ark. f. Zoologi. Stockholm. Bd. 7 n:o 24. 



