LINDSAYj ON POLYMORPHISM IN LICHENS. 7 



V. atomaria. Siiermatia and Sporidia in same 

 Perithecium. 

 I made apparently tlie same observation in Sjjharia Lind- 

 say ana, a New Zealand species ;* and Gibelli, in Italy^ re- 

 cords the occurrence of Spermatia in the asciferous Perithecia 

 of several Verrucari(B.-\ 



II. Genus Arthonia. 



A. cinereo-pruinosa. Two or more forms of Sper- 



mogonia. 

 A. pruinosa. Pycnidia. 



,, var. Spilomatica. Two forms of Stylo- 



spores and Basidia. 

 A. astroidea. Spermogonia and Pycnidia. 



,, var. Swartziana. Two forms of Stylo- 



spores and Basidia. 



III. Genus Opegrapha. 



0. herpetica, 0. vulgata. Two or more forms of 



Spermogonia. 

 0. atra, 0. varia. Pycnidia. 



IV. Genus Lecidea : 



L. parasema,L. dryina. Two forms of Spermogonia. 

 L. luteola, L. petrma, L. anomala, L. disciformis, 



L. albo-atra, L. Cladoniaria. SjDermogonia and 



Pycnidia. 

 L. entcroleuca. Pycnidia in lieu of Spermogonia. 

 L. abietina. Pycnidia, and two forms of Sj)ermo- 



gonia. 

 L. flewuosa. Pycnidia. 



* " Observations on New Lichens and Fungi of Otago, N. Z.," ' Trans, of 

 E,oyal Society of Edinburgli,' vol. xxiv, p. 423, ])1. xxx, figs. 1 — 7. 



f Dr. Giuseppe Gibelli, of Pavia, " Sugli Org. reprod. del. Gen. Verru- 

 caria" ('Mem. Soc. Sci. Nat. Ital.'), quoted in "Notulae Lichenologicse " 

 of the Rev. W. A. Leighton ('Annals of Nat. History,' April, 1866, p. 270.) 

 He asserts — though his statement is confradicted by other lichenologists 

 {e.g., by Nylander, 'Flora,' 1865, p. 579) — that in a number of Verriicariee, 

 especially those with simple spores and no distinct paraphyses, — i.e., all saxi- 

 colons species — there are no separate spermogonia, but the upper portion of 

 the asciferous perithecium is lined with sterigmata bearing spermatia. He calls 

 this spermatigerous apparatus, when enclosed in an asciferous peritliceium, 

 a "Spermatokalium : ''and he describes V errucaria; as hermaphrodife where the 

 spermatokalia constitute a fringe in the upper part of the peritliocium impend- 

 ing over the asci, and their sporidia. On the other hand, he disignates Ver- 

 rucarice, which have separate spermogonia and distinct paraphyses, 

 dichious. All the saxicoloiis species belong to the former category, and the 



orticolotis to the latter. A very convenient generalisation, if it be founded 



nfacl! 



