70 Mr. KiPPisT on the existence of Spiral Cells 



pressed, apparently porous, somewhat wavy or bent at their extremities : the 

 marginal hairs are long, slender and tapering, furnished with numerous ap- 

 proximate rings, which are frequently replaced towards the base by spiral 

 fibre. In Strobilanthes imbricata, S. Brunoniana and S.monadelpha, the testa 

 is formed of much shorter cells, but in other respects similar to those of the 

 foregoing species. The hairs of S. imbricata, which are short, thick and annular, 

 proceed chiefly from the margin. In S. Brunoniana and S. monadelpha, the 

 hairs, which resemble those of the last species, except in being longer, occupy 

 a considerable part of the surface of the seed, although much more numerous 

 at the margin than elsewhere. The seeds of S.Jimbriata and S. WaUichii differ 

 materially from those of the other species I have examined in the nature and 

 disposition of the hairs, which are short, blunt-pointed, and entirely destitute 

 of fibre in both ; they are distinctly visible on the dry seed, and do not change 

 their position or emit any mucilage on being placed in water. In the former 

 species they are remarkably rigid, and entirely cover the seed, to which they 

 are obliquely attached by a decurrent base ; in the latter they are formed of 

 rather thinner membrane, and frequently half filled by a yellow resinous-look- 

 ing substance : with the exception of a small vacant space round the hilum, 

 they occupy the entire surface of the testa. 



The seeds of Stenosiphonium suhsericeum and u^theiletna reniforme bear a 

 close resemblance to those of Strobilanthes Bru7ioniana and monadelpha, the 

 border being formed of slender, tapering, annular hairs, whilst smaller ones of 

 a similar construction extend inwards over the greater part of the surface. 

 The testa appears to consist of an outer membrane, formed of nearly quadran- 

 gular cells covering a layer of more elongated woody ones. 



Of the genus Dipteracanthus, I have examined three species, D. patulus, 

 D. erectus and D. dejectus : in the two former the seed is of a lenticular form, 

 concavo-convex, with a narrow membranous border, formed of moderately 

 long hairs, blunt-pointed*, destitute of fibre, and discharging copious streams 

 of mucilage from their extremities. The testa is composed of short thick- 

 walled, woody cells on the surface, and of a transparent membrane beneath, 



* Among the mucilaginous fluid emitted by the seeds of D. patulus, I observed a number of faint 

 rings, apparently of half-formed fibre : it is not improbable, therefore, that in the fully mature seed 

 the hairs may be either annular or spiral. 



