ELEJIENTARY STRUCTURE. 



55 



what is termed a shield-like or pdtate hair (Jig. 126). Many of 

 the above forms occur equally in simple hairs, as in compound 

 ones, and the figm'es are taken indifferently from either. Many 

 hairs hare one or more spiral fibres in their interior, as those 

 on the seeds of Acanthodium, &c. {Jig. 127). 



Fig. 127. 



Fig. 128. 



Fig. 129. 



Fig. 127. Hairs with spiral fibre in their 

 interior, from the skin of the fruit of 



Salvia Horminum. Ftg. 128. Scale or 



radiating hair of the Oleaster (Elceag- 



tms) Fig. 129. Ramenta from the rachis 



of a Fern. 



Fig. 130. 



Fig. 130. Ramentaceous hair. 



Fig. 131. Prickles on 



Rose-branch. 



Fig. 131. 



When the divisions of stellate hairs are closely connected, by 

 cuticle or otherwise, they form scales or scurf; such epidermal 



