OF THE P'ERICHATIUM 



ture, serving frequently to discriminate 

 species. See Engl Hot. U 1037—9, 1182, 

 1445 — 8, &c. ; see also the same part in 

 Neekera, t. 1443, 4. Linnaeus apears by 

 his manuscripts to have intended adding 

 this to the different kinds of calyx, though 

 it is not one of the seven enumerated in 

 his printed works. Nor is he, surely, cor- 

 rect in allowing it to the genus Junger- 

 mannia. The membranous part which he 

 there calls pcrichcetium is strictly analo- 

 gous indeed to the cah/ptra or veil of real 

 mosses, esteemed by him a kind of calyx ; 

 but as I presume with Schreber to reckon it 

 rather a corolla, and Hedwig once thought 

 the same, and as Jungermannia has more 

 or less of a real calyx besides, see EngL 

 Hot. t. 771? &c, I would no longer apply 

 the term perich&tium to this genus at all. 



The part called calyptra being removed 

 from the list, as being a corolla, the peri- 

 . chcctiiim takes its place among the seven 

 kinds of calyx. We lay less stress upon 

 this coincidence than Linnaeus might have 

 done, when, according to the fashion of 

 the times, he condescended to distribute 



