274 MR. F. E. BEDDAED OlS" GALA GO GARNETTI. [Mar. 19, 



large fibres as are those which constitute this peculiar organ in 

 Hapalemur griseus and Galago garnetti v^oiild seem to need some- 

 thing larger than the normal glands of the integument, if we are to 

 explain them as a glandular secretion. The spinelets are hard 

 and horny, much of the consistence of nails. When softened a 

 little with potash, they can be readily split longitudinally into 

 fibres. When this is done, the spinelets appear to be made up of 

 irregularly-shaped flakes (see text-fig. 73) which imbricate in a scaly 

 fashion not at all unlike the outer coat of hairs. The individual 

 flakes readily become detached when a fragment is teased with 

 needles. They are rather angular and of different shapes, not at all 



Text-fig. 73. 



Galago garnetti. 



One of the borny outgrowths, teased in glycerine to show cornified cells. 



Highly magnified. 



unlike the scales of hair. Their general appearance will be gathered 

 from an inspection of the accompanying drawing (text-fig. 73), 

 which represents a fragment teased in glycerine after softening in 

 potash. Treatment with acetic acid showed no traces of a 

 nucleus in any of these flakes; but this negative result is not 

 necessarily fatal to regarding them as cornified cells. 



I made some transverse sections of this region of the integument 

 (see text-fig. 74, p. 275) in order to see if there were any glands 

 concealed in the thickness of the dermis which might be responsible 

 for the formation of these spiny structures. There were a few sweat- 

 glands, but so few that they were nor an important feature of the 

 sections. The sections showed the great contrast between the spine- 

 covered area of the ankle and the hair-covered tracts which abut 

 upon it and enable me, I think, to settle the nature of the spinelets. 

 The hairy part of the skin has a very slight horny layer superficially ; 



