72 Mr. Kippist on the existence of Spiral Cells 



often present a peculiar chain-like appearance, from their being- contracted at 

 short intervals, and apparently compressed in opposite directions. In two 

 species of Goldfussia, G. divaricata and G.lamiiflora, they are very long and 

 slender, but distinctly jointed or annular. Those of G. pentstemonoides and 

 G.jolorata are often singularly refracted and waved at their extremities. 



Hairs of a very remarkable form occur on the seeds of two closely-allied 

 Chilian plants, one of thern being the Ruellia dulcis of Cavanilles, the other a 

 new species found at Concon by Mr. Miers, who informs me that they will 

 probably form together a new genus, to which he proposes to give the name of 

 Micrma. In both species the testa is entirely covered with moderately long 

 rigid hairs, which are directed upwards, and distinctly visible upon the dry 

 seed, longitudinally striated, appearing as if formed by the adherence of seve- 

 ral very slender tubes, and armed with numerous recurved hooks, which are 

 evidently hollow, and seem to communicate with the tubes ; each hair is usu- 

 ally terminated by two of these hooks, pointing in opposite directions. The 

 hairs do not discharge mucilage, or change their position materially on being 

 placed in water. & 



A structure very similar to the above occurs in the seeds of Rhaphidospora 

 glabra, whose bans ddfer chiefly in being shorter, thicker, and much more 

 do, y beset w.th recurved teeth : as in Mcr.a, they are entirely destitute of 



%3X? may seen " pon the dry seed ' which they render per - 



red H uced ini 11 o T "V*™* * ^ ° f **"***+ "»"* ™h 



list;^^^^^ 



Kttle rounded tubercles of "a t*3T£? , ",*?** ^ ^ 

 tissue as the rest of the testa Each rf h ■ ^ ° f the Same kilK ' ° f 



short hair, terminated b^ rom ee ^ tUberC ' eS ," "^ »*> * «* 

 having on the sides a few oTer k l " "T* Elating hooks, and 

 «-Mb the hairs nea 1 rabl T ^ »• In *"*•■ 

 not appear to be seated upon £Z£ ££ £ *?* * **> «° 

 covered with slightly prominent tuberc es med f ^ W " fe * the Seed is 

 cells, but destitute of hairs. ° f ^ minnte hexagonal 



