FalMands, etc.] FLORA ANTAECTICA. 541 



The Cockbiirn Island specimens are very imperfect, and may possibly belong to Umbilicaria sordida. 



2. Perttjsaria Wulfeiiii, DC. ; Fries, Licli. Europ. p. 424. Porina fallax, Pers. ; Ach. Synops. 

 Licit, p. 110. Lichen hymenius, Engl. Bot. t. 1731. 



Hab. Falkland Islands ; on rocks. 



20. THELOTEEMA, Ach. 



1. Thelotrema lepadinum, Ach.; Lick. Univ. p. 312. t. 6. f. 1. Scheerer, Lick. Helvel. n. 121. El. 

 Antarct. Pt, 1. p. 200. 



Hab. Herrnite Island, Cape Horn ; on Winter's-bark. 



21. VERRUCARIA, Pers. 



1. Verrucaria umbrina, Ach.; Lick. Univ. p. 291. Engl. Bot. 1. 1499. V. gelida, nobis in Lond. 

 Joum. Bot. vol. iii. p. 639. (Tab. CXCVIII. Pig. IV.) 

 Hab. Cockbiirn Island, Graham's Land ; on rocks. 



The difference between the apothecia of the Antarctic and European specimens is the same as exists between 

 V. tnaura and V. umbrina, plants which I consider as specifically the same. C. Bahington. 



Plate CXCVIII. Fig. TV, — 1, plant of the natural size; 2, portion of crusti ; 3, do with apothecia; 4 and 5, 

 apothecia; 6 and 7, vertical slices of do; 8, portion of lamina proligera; 9 and 10, sporules : — all very highly 

 magnified. 



22. COLLEMA, Ach. 



1. Collema crispum, Ach.; Synops. Lick. p. 311. Engl. Bot. t. 834. Parmelia pulposa, Scheerer. 

 Hab. Cockbum Island, Graham's Land ; on wet earth. 



Miserably depauperated specimens, referred both by the Rev. Mr. Berkeley and Babington to this plant. 



2. Collema tremelloides, Ach. ; Lich. Univ. p. 455. Engl. Bot. 1. 1981. 



Hab. Hermite Island, Cape Horn ; on wet banks. 



Possibly the C. pahnatum, Sin.; my only specimen of which plant (received from Mr. Borrer), may be a dwarf 

 and brown one of C. tremelloides. C. Babington. 



3. Collema saturninum, Ach ; Lich. Univ. p. 644. Engl. Bot. t. 1980. C. myochroma, Scheerer, 

 Lich. Helvet. 



Var. australe, thallo subferrugineo. Collema australis, nobis in Lond. Joum. Bot. vol. iii. p. 656. 



Hab. Hermite Island, Cape Horn ; on wet banks in dense woods ; abundant. 



There is a redder hue about these specimens than I am accustomed to see in British ones of C. satur- 

 ninum, but according to Schrerer's description, this is evidently a very variable plant. The characters drawn from 

 the powdery buds, are not available. C. Babington. 



6 L 



