1910.J OUTAXKODS SOE.VT-viLAXDS OF IIUMJ.VAXTS. H()7 



Hubfiimily C E p ii A L o p ii i x .e. 

 (The Duikers.) 



According to Owen the following species of this subfamily hiive 

 inguinal pits and preorbital glands lodged in a depression of tiie 

 maxilla: — Cephalopkus silvicaltrix, grimvii { = ineiyens, bHrckelli, 

 (jrimmi), monticola (perpasilla, pygma'Ci), iuaxirelli. 



Two species were examined by Ogilby, namely, O. viouticola, 

 cited as Tra{/idi(.s pi/giiueas, and 0. grinimi, cited as Sylvlcajyra 

 inergens. According to this author C monticola has neither 

 inguinal nor iuterdigital glands, wliereas in C grinimi tliere are 

 small interdigital glands and distinct inguinal glands, both species 

 having oblong maxillary [pi'eorl)ital] glands lodged in depressions 

 of the maxilla. Ogilby also records the presence of two pairs of 

 mammae in this genus*. 



The pi'eorbital gland is describeil in most recent systematic 

 works as consisting externally of a bare streak of skin studded 

 with a series of pores and situated some distance in front of the 

 eye of the corresponding side. Weber f describes in detail the 

 histological structui-e of the gland and the nature of its secretion 

 in C. pi/gmreus [=monticoIc(], points out the difference it presents 

 in the male and the female, and gives a list of the species in which 

 he hail observed its external form, together with much other 

 interesting matter. I'he pedal glands do not ap[)ear to have been 

 described. 



Genus Guevei Gray t. 



GuEVEi MAXWELLi H. 8m. (IMaxweH's Duiker.) 

 (Text-figs. 91,A, et 92.) 



In a female example from Portuguese Guinea, presented by 

 Dr. Ansorge, the external streak of the preorbital gland was 

 markedly bent downwards at its posterior end towards the anterior 

 corner of the eye, its lower margin being therefore concave. It 

 was studded with about 25 vertically elongate pores, forming a 

 single series, from each of which a few short hairs arose. With 

 pressure, liquid drops of secretion could be easily stpieezed from 

 the pores. The gland itself underlying the bare streak did not 



* The specific u-dnm^i perpusill us awl j>i/;/ miens have been assigned to tlie so-calleil 

 Royal A\\U'\n\w . Xf'Ofi-a<;its pifginceus; and Sclater and Tiionias cite Trai/n/iis 

 jiilHtiueiis of Ogilliy in the synonymy of NeotraijKs jij/i/nifens. This view' is, I 

 think, incorrect, because Ogilby descrilied the pveorijital gh'inds oi Trayidiis pi'i/mrms 

 and of Si/h'icapra men/ens in exactly the same terms as " glandnhe maxillares 

 oblonojie " ; and since Si/luicapra mergens is admittedly a Cephalophine, one must 

 infer that Ogilby's Tragiil us pi/gituens nho belonged to that subfamily and not to the 

 Xeotragina'. That Owen's AutiJope perpusilla and pinimteit were also'c'ephalophi.ies 

 is clearly indicated by his placing them with other sjuriesof Cfph,ih>phns in a crroup 

 characterized by " maxillary " as opnosed to " suborbital i)its."' JIoreo\er. he .jiiotes 

 S. Africa as the locality ot perpusiUa^ whereas Xeotrtuius pi/giiKemt comes from 

 Liberia. 



t Arch. mikr. Anat. xxxi. pp. 507-531), 1888. 



I Reasons for the adoption of this genus are given below (i)p. 871-876). 



