108 Mr. R. Spruce on the Musci and Hepaticce of the Pyrenees. 



24. /. cordifolia, Hook. Br. Jung. t. 32 ; Syn. Hep. p. 95 ; 

 H. P. 24. 



Hab. Tax— 2 P- c. in fontibus profundis secus ripas ilum. Adour, 

 in pagi Aste conspectu; necnon inhumidis montis Crabioules. 



Dr. Gottsche informs me that this species does not differ from Jg. 

 tersa y. rivularis of German authors. 



25. /. riparia, Tayl. ! in Annals of Nat. Hist. xii. p. 88 ; 

 Syn. Hep. p. 97; H. P. 25. 



Hab. Zi_3 in rupibus irroratis^ rarius ad terram, frequens. 



This species is often mixed with Jg. acuta, but it is not, like that 

 species, confined to calcareous rock. 



26. /. pumila, With. Arrang. 3. p. 866 ; Hook. Br. Jung. 

 t. 17. 



Hab. Z^ P. c. ad saxa in sylva Bois de Sajust dicta: aliubi 

 hand visa. 



I cannot distinguish authentic specimens of Jg. Zeyheri, Hueben, 

 from this. Both are remarkable for the perianth terminating in a 

 cone, which is not plicate, but has a furrow on each face, that on the 

 dorsal being most evident, and along this the dehiscence takes place 

 for the emission of the capsule. 



§ 3. BiDENTEs, Syn. Hep. 



27. /. acuta, Lindbg. ; Syn. Hep. ! p. 103. /. Muelleri, 

 N. ab E. ; Syn. Hep. ! p. 99 ; H. P. 26, 27, 28*. 



Hab. Z]_2 locis calcareis subbumidis terrestris et saxatilis, ra- 

 rius lignicola, per Pyrenseos frequentissima. 



In * Hepaticse Pyrenaicse ' I gave three forms of this species, 

 scarcely differing from each other except in size ; the third form 

 (No. 28) attains a length of 3 or 4 inches, and forms closely-tufted 

 patches on the nearly vertical faces of rocks watered by the spray of 

 rivulets in the upper part of the Vallee d' Ossau and the Gorge de 

 Labassere. I there considered Jg. Bantriensis, Hook. Mst., which 

 I gathered abundantly in Teesdale in 1843, as belonging to the same 

 species, but at Dr. Gottsche's suggestion I have reconsidered this 

 opinion, and I now think that the two may in all cases be safely 

 distinguished. The differences are these : — in Jg. Bantriensis the 

 leaves are always more or less erect, and in the large form they are 

 secund, the two rows being contiguous by their upper surfaces, which 

 I have never seen to be the case in Jg. acuta ; they are also less un- 

 dulate, the sinus not gibbous, though from the incurvation of the apices 

 there is sometimes the appearance of it. Perianth when young (and 

 in all stages when unfertile) pyriform or broadly clavate ; while the 

 perianth of Jg. acuta, in all states and at every age, even when quite 



* Jg. acuta and Muelleri are now ascertained to be absolutely identical, 

 the former having the stipules nearly or altogether obsolete. 



