Stikton. — On Australian and New Zealand Lichens. 81 



The variety moniliformis, Bab., is a well-marked one, 

 inasmuch as the yellow branches as well as the stems are 

 moniliform-constricted throughout. From Beechcroft, Vic- 

 toria (Falck), 1881. 



Another rather common form is that where the whole 

 plant is nearly isidiose. This may be called var. isidiella. 



A third was sent to me by the late Baron F. von Miiller 

 from Tasmania. In this the whole plant is pale-brown or 

 cervine in place of a light or pale colour ; the stems and 

 branches are flat and narrower than usual (latit. about 

 1 mm.), and not constricted hei-e and there, and the radicles 

 beneath nearly black, coarser and stronger and not so densely 

 interwoven ; apothecia larger in proportion to the stems 

 (latit. 2-6 mm.), usually split all round in a radiatmg manner. 

 This may be called var. falckii. 



Lastly, Mr. Beckett sent me from North Canterbury a 

 pale variety, where the yellow colour is scarcely perceptible. 

 This form grew closely intermingled with P. physodcs. 



Aspidelia beckettii, Strn. Gen. nov. 



Thallus pallidus vel glaucescenti-pallidus, nitidus, lobato- 

 laciniatus, lobis sinuato-divisis, sorediis albis, innatis, minutis 

 vel punctiformibus vel tenuiter oblongis, creberriter adspersus, 

 subtus fusco-niger vel niger, parce nigro-rhizinosus ; apothecia 

 fusco-rufa, ssepe lobulata et medio perforata (latit. 4-11 mm.); 

 sporsB 4-8n8e in thecis arthonioidese, i.e., parietibus crassis 

 hyalinis, incolores, eliipsoidese, simplices episporio duplici, 

 0-013-0-018 X 0-008-0-011 mm., paraphysesvaldeindistinctae. 

 lodo g.h. thecarum c£erulescens dein sordida, caeteroquin vix 

 tincta nisi lutescens ; medulla alba K fl. dein intense rubens. 

 Spermogonia in tuberculis elevatis, irregularibus, rugulosis vel 

 cerebriformibus, discoloribus (lutescentibus vel pallidecarneis), 

 hinc inde nigris, interdum majusculis (latit. 0-5-2 mm.) sita, 

 extus nigra minuta, numerosa, 4-25 in quavis verruca ; 

 spermatia cylindrica vel apicibus obsolete incrassatulis, 

 0-006-0-008 X circ. 0-0005 mm. Corticola, New Zealand 

 (T. W. Naylor Beckett). 



At first sight this lichen has somewhat the appearance of 

 P. perforata. 



As I have not seen spermogonia clustered in raised 

 tubercles of a diverse colour from the rest of the thallus, and 

 having spores contained in thecae with thick pellucid walls, 

 I have been constrained to separate this lichen from the 

 Parvielia,. 



I possess a second species of this genus from the Hima- 

 layas, gathered by Dr. George Watt at an elevation of 

 12,000 ft., where the clusters of spermogonia are on a larger 

 6 



