116 



Bot.) and in my own from Ecuador, the lobule is invariably finely 

 toothed all round. 



Isotachis serrulata, Sw., is one of the most conspicuous of 

 hepaticae from its size, its purple or blood-red color, and its habit of 

 forming wide, dense patched, rarely with any admixture of other 

 species. It is well represented in Dr. Rusby's collection, and we 

 have it also from south Brazil and the Antilles, yet I was never 

 fortunate enough to fall in with it. 



The solitary species of Herberta (= SenJtnera, Syn.) differs 

 from all others known to me by the serrated lacinia^ of its deeply 

 bifid leaves. 



Bazzania is represented by four species, three of which have 

 been previously found in Chili, New Granada, etc, B. Rusbyi.n, 

 sp. is a very pretty species, notable for its pellucid foliage, its 

 underleaves sharply spinuloso- dentate, etc. The Mexican B, 

 denticulata^ L, et G. is possibly its nearest congener, but is 

 smaller, more opaque, and the underleaves are much less toothed, 

 especially at the sides. In a genus where the numerous species 

 are separated by such minute characters, two equally conscien- 

 tious observers will often differ as to which are species and which 

 varieties. 



Oi the five Lepidozice In the collection, two exist in some 

 quantity, and were probably abundant. The one is Z. plumce- 

 fonnis, nob. in Rev. Bryol. (1887) previously known to us only 

 from scanty specimens gathered in south Brazil by Glaziou ; the 

 other is the widely-distributed L, cupresshia (Sw.), which (as L. 

 twnidnla, TayL) extends as far north as the British Isles. A 

 third Lepidozia^ of which there are but few specimens, is a variety 

 of L. tntncatella^ Nees, whereof the type is south African. Al- 

 though the identity of an African with an American hepatic is 

 to be admitted with caution, we have a few undoubted examples 

 of such, e. g. Lejeiinca trifar'ia, N. and Z. Sagraeana, Mont. 



PlagiochilcB constitute the bulk of Dr. Rusby's collection. 

 They are in greatest variety in the sections Spinulos^e and Fron- 

 descentes, and they include a fair share of novelty. A Plagiochila 

 near the common P. asplenioides of the north temperate zone, 

 yet well distinguished, is the P, alternans of Gottsche, still 

 known only in barren state. Although Dr. Rusby's specimens 



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