32 RKV. W. A. LEIGHTON OX NEW NEW-ZEALIND LTCIIEXS. 



I^jl. Addit. Cliil. .1G4, says, " liypothecium lateribus deni- 

 gratiun, apotlieciaque seruginose pruinosa." These appearances 

 I have not observed in the specimens before me, in which the 

 hjpotheeium was pale and, with the lamina proligera, imbedded 

 in a pale brownish horny receptaclej whose upper edge con- 

 stituted the margin of the apothecium. The paraphyses were 

 slender and distinct, but closely packed. The aqueous solution 

 of iodine turned the whole lamina proligera of a dark blue ; but 

 on separating the asci and spores, they were found to be turned 

 to a dark -brown colour. 



Plate IV. fig 13, section of apothecium, enlarged ; fig. 14, spores, raagn, 

 600. 



4. Lecidea parasitica, Flk. ^Q,v^%\t\c on Lecanora parella. New 

 Zealand {Colenso in herb. Hooker.), 



5. Lecanora leucoph^a, Flk. 



Ad saxa. New Zealand ; dry beaches near Napier ( Colenso, no. 6445, 

 in herb. Hooker.). 



6. Lecaxora pachypholis, Nyl., n. sp. Thallus crustaceus, cras- 

 sissimus, cinereo-glaucescens^ profnnde rimosus; areolae magnae, tur- 

 gidsB; depresso-convexae, glabra?, minute verrucoso-crenulato-coiTU- 

 gatac, distinctissime et abundanter punctata; spermogoniis nigris ; apo- 

 thecia magna, prominentia, areolis insidentia ; discus purpureo- 

 niger, planus, margine crasso turgido incurvato deformi ductus ; 



« 



lamina prohgera purpurea, minima profunda; paraphyses nulhxi ; asei 

 ampli, elongato-clavati ; sporsc? sphaericae, purpurese, indistincte visfc. 

 Ad saxa, Napier, New Zealand {Colenso, no. 6350, in herb. Hooker.). 



A vertical section of the apothecium shows the lamina pro- 

 ligera, of a purplish hue, very shallow, resting on a thick deep 

 hypothecium, pale above, and of a bi:ownish hue at the base, 

 imbedded in the thick turgid margin of the apothecium. The 

 lamina proligera consists of short elongato-clavate asci vertically 

 packed, without any paraphyses, which exhibit on the disk an 

 irregular hexagonal form, sometimes apparently open and empty, 

 at other times closed, and bearing in the centre a spherical glo- 

 bule, possibly the spores. The supposed spores were not de- 

 tected in situ in the ascus. Spermatia elongated, cylindrical, 

 straight. Hydrate of potash turned the thallus yellow. Dr. 

 Nylander (in Hit.) says, "Pros du Z. atra.'' 



Plate IY. Fig. 6*, Lecanora pachypholis^ nat. size ; iig. 7, areola of thal- 

 lus, magn. ; fig. 8, apothecia, magn. ; fig. 9, vertical section of apothecium 

 and thallus, magn.; fig. 10, asci, magn. ; fig. 11, supposed spores, magn. 

 600; fig. 12, spormatia, magn. 600. 



