Zic/tenes.] FLORA OF NEW ZEALAND. 307 



each other like stones in a wall.— Plate CXXVIII. D. Fig. 1, plant, natural size; 2, upper, and 3, under surface 

 of thallus ; 4, vertical section of apothecium ; 5, immature, and 6, mature asci ; 7 and 8, sporidia -.—all Uglily mag- 

 nified. 



Tribe III. VERIiUCARIEM 



Gen. XXVII. VEBBUCARIA, Ach. 



An extensive genus, occurring in all parts of the world, the species of which are very ill understood, partly in 

 consequence of the extreme minuteness of many of them. The sporidia of the British species are figured by 

 Leighton in his British Angiocarpous Lichens. 



1. Verrucaria nitida, Schraol. Fries, Lich. Mtrop.p. 443. 

 Hab. Northern Island, Bay of Islands, on bark, J. D. H. 



A variable species in New Zealand, as well as in Europe. The form nilidella, Florke, likewise occurs in New 

 Zealand. 



2. Verrucaria alia ?, Schrad. Fries, Lich. Eur. p. 444. V. dermatodes, Tayl. ! LieJi. Antacrt. n. 27 

 (not Borr. ! which Leighton rightly determines to be a form of F. nitida, Ang. Lich. p. 36.) 



Hab. Northern Island, Bay of Islands, on bark, J. I). H. 



I am not at all satisfied that I have determined this species correctly. Mr. Leighton has kindly examined 

 the sporidia, which he finds not unlike those of V. nitida. 



3. Verrucaria immersa, Pers. V. mpestris, Fries, Lich. Eur. p. 436 {in part). 

 Hab. Northern Island, on calcareous stone, Colenso. 



4. Verrucaria umlrina, Wahl. Fries, Lich. Fur. p. 441. 



Hab. Northern Island, Colenso. On pebbles, in a bad state, almost without a crust. 



5. Verrucaria muralis?, Ach., Syn.p. 95. Fries, Lich. Eur. p. 436. Schcer.! Exs. n. 441. 

 Hab. Northern Island, on sandstone, Colenso. 



Perithecia entire in Mr. Colenso's specimen. 



6. Verrucaria maura, Wahl. Fries, Lich. Eur. p. 442. 

 Hab. Northern Island, Colenso. 



The stones on which this grows have evidently been suffused by sea-water, consequently there is not much 

 doubt that the specimens are correctly named. 



There is no question that this enumeration of the Verrucarim of New Zealand is incomplete; probably many 

 other species occur. 



Suborder III. BYSSACE^E. 



Tribe I. COLLEMACEM 



Gen. XXIX. LEPTOGIUM, Fries. 



1. Leptogium Brehissonii ? , Mont.! in Well et Berth. Hist. Can. p. 130. Collema ruginosum, Buf. 

 HI. Schmr. Emm. Crit. p. 251. C. rugatum, Tayl.! Lich. Antarct. n. 143. ut supra. Stephanephorus 

 Dufourianus, Bal. olim in sched. cum Lich. Byren. Sprue, divulgatis. 



Hab. Northern Island; on trees, barren, Bay of Islands, /. JD. II., Sinclair. 



A handsome species, easily known (when fertile) from most of its allies by the elevated plica? and striations of 



