196 Mr. R. Spruce on the Musci and Hepaticse of Teesdale. 



larisj Polygonum viviparum, Saxifraga stellaris and aizoides, and 

 many other of the " glories " of Teesdale^ which it gave me great 

 pleasure indeed to see, but which I -was content to leave un- 

 touched, they assuredly grow in equal luxuriance on both for- 

 mations. 



But my object was not so much to ascertain the distribution 

 as to determine the limits of the different species ; and what fol- 

 lows is not a mere list of localities, but contains the result of 

 extensive observation in the field, and careful investigation and 

 comparison in the cabinet. I have adopted the generic distri- 

 bution of the ' Bryologia Europsea,' so far as the published num- 

 bers of that work extend, because it is by far the most natural 

 of any I have seen, and I have no doubt will be adopted, in great 

 part at least, by the bryologists of this country, when its merits 

 come to be fully known*. I have also in many cases quoted 

 from the same work the specific characters of such mosses as have 

 not been previously described in any work on British bryology ; 

 but the numerous analyses and descriptive remarks are entirely 

 deduced from my own observations. 



The total number of species observed in Teesdale amounts to 

 208, of which 167 are Musci and 41 Hepatic(2 ; but this can only 

 be regarded as an approximation to the existing number ; and a 

 residence of three or four years in the centre of the district, with 

 an attentive examination of localities at all seasons, would not 

 more than suffice to ascertain the exact amount of its treasures. 

 I have to add, that my collection contains a few mosses which 

 from their imperfect state 1 have been unable to determine satis- 

 factorily ; these are not included in the foregoing enumeration. 



Musci. 



1. Andraa alpina, Hedw. Limestone rocks on Cronkley Fell. 



2. A. Rothii, Mohr. Cronkley Fell, on limestone ; Falcon Glints, 

 on basalt. 



Z. A. rupestris, Hedw. Frequent on rocks and stones. I gathered 

 a large var. on Cronkley Fell, growing with A. alpina, and scarcely 

 to be distinguished from it at sight. 



4. Anictangium ciliatum, Hedw. White Force, Falcon Clints and 

 other places, yet nowhere abundant. 



5. Anomodon curtipendulum, H. and T. Walls near Romaldkirk 

 and below the High Force inn. Especially abundant in the wood by 

 the Tees' side below Holwick, and in fruit, but out of season. 



6. A. viticulosum, H. and T. Trees and rocks, frequent. 



7. Aulacomnion palustre, Schwsegr. (Bryum palustre, H. and T.) 

 Bogs and moist rocks. 



* Wherever the nomenclature differs from that of ' Muse. Brit./ the syno- 

 nyms of this work are always added. 



