LINDSAY, ON ABROTIIALLIJS. OO 



more or less granular internally. Similar appearances are 

 figured in the elaborate but liighly speculative memoir of 

 Bayi'hoffer.^ I mention these crude observations suggestively 

 here, not only from a ^vish to show that the reproduction of 

 the lichens is even yet imperfectly understood, and that the 

 subject of these accessory or secondary reproductive cor- 

 puscles will amply repay elaborate research, but because I am 

 desirous of entering my protest against exceptions taken by 

 Tulasne to certain observations made by Berkeley and 

 Broome, Dr. J. D. Hooker and Babington, in this country. 

 From some, apparently casual, observations of these botanists, 

 it woidd appear that the paraphyses may sometimes assume 

 the function of sterigmata, generating from their apices 

 spheroid corpuscles, or may themselves be transformed into re- 

 productive bodies. Tulasne throws a distinct doubt on the 

 accuracy of the observations in question C^Mem.,' pp. 

 110 and 111), and endeavours to explain them as the resuJt 

 of an optical error. He remarks, and with great truth, that 

 the spores of certain species, fr-om their tenuity and other 

 characters, closely resemble the paraphyses (e. ff. among the 

 Peltigerese) ; that after emission fr'om the theca they some- 

 times become entangled among the paraphyses, and may there 

 germinate ; and that in such a case true spores might appear to 

 be generated by, instead of only among, the paraphyses. I have 

 never seen the phenomena described by Berkeley and Babing- 

 ton, and therefore cannot vouch for the accui'acy of their ob- 

 servations. But I have seen the terminal ceUs of the paraphyses, 

 especially under the use of reagents, remarkably resembling 

 gonidia or stjdospores, or the cellides which I have described 

 as generated, laterally and terminally, from peculiar tubes. 

 Under the use of aqua potassse, for example, I have seen the 

 tips of the paraphyses of the apotheeia of A. Smithii dis- 

 sociated, the brown colouring matter dissolved out, and the 

 obovate terminal cell occupied by a colouiiess globule or 

 globules, giving it precisely the appearance of many of the 

 stylospores of the same species. So long as atc are ignorant 

 of the origin, development, and functions of the corpuscles 

 Avhich I have mentioned, and Avhile there is reason to believe 



* 'Einiges uber Liclienen und deren Befruclitimg.' Bern, 1S51. 



Com|iare pi. i, figs. 11 and 12. " Einzelne f'aseru mil, an den Enden vmd 

 Seiten bcfindlicheu runden Zellclicn." Eigs. 13 to 15. "Faseru mit Zelleii 

 der mannlichen Gonidien-zellen." 



PI. ii, figs. 7 to 11. " Mannliche Prosphj'sen — mit runden Endzellen" — 

 "mit eilormigcu Verlangenuigen" — "mit walzenformigen Verlangerungen 

 (abgescliniiret die Androsporeu und nocli einigen runden Zellclien)." Figs. 

 17 to 20. " Weibliclie Prospliysen in verscliiedenenEutwickelungs-stut'en." 



PI. iii, fig. 12 a. " Losgeloste Prosphyseu." 



