Campbell's Islands.] FLOEA ANTARCTICA. 173 



Hypogena, nigra, maculam nigrani subeffusam superne stromatis indicern exhibens, una tanturn niacula in sin- 

 gulo folio ut videtur evoluta. Stroma -§—1 lin. latum, hemisphericmn, carbonaceurn, extus scabriusculum, neo evidenter 

 papillato-granulosum, demum fatiscens : intus carbonaceum, superne reticulatim cellulosum, sub lente atro-caeruleum 

 vel demum viridi-fuscum constans, basi in floccos abeunte. CeUulte fructifem oblongo-eUiptica>, periphericse, obtusi- 

 usculae, vix apiculatse. Asci breviusculi. Sporidia octona, oblonga, uniseptata, medio constricta. 



This species has much more the habit of a Spkaria than most Dothidea, being of a carbonaceous texture, 

 like the Spharia fragiformis ; but though, on making a delicate vertical section, a thin stratum of tissue, consisting 

 of only a single layer of cells, occasionally appears, no trace of this is seen on the sides of the cavities distinct from 

 the neighbouring tissue. The specimens procured are not numerous, in no instance does more than one individual 

 appear upon a single leaf, the latter being probably of too small a size to support more than a solitary stroma of such 

 high organization. Like some other species indicated by Montague in his ' Fungi of Cuba,' this is probably originally 

 produced between the layers of the cuticle, for some of the latter is found beneath the stroma. The cells of the stroma 

 pass at the base iuto a mass of reticulated filaments, without any membrane being attached to the meshes. 



Plate LXVII. Fig. II. — 1, a sprig of Veronica odora, with the fungus of the natural size ; 2, a section of the 

 fungus; 3, a portion of the same, more highly magnified; 4, an ascus; 5, sporidia; 6, a section shewing the loose 

 cellular tissue of the centre, the pentagonal tissue about the base of the cells, and the elongated tissue between 

 them : — all magnified. 



2. Dothidea spilomea, Berk.; gregaria, kypophylla, maculis epipliyllis nullis v. obsoletissimis, subinnata, 

 depressa, tenuis, orbicularis, ssepe confluens, minutissime granulosa, nitida, cellulis globosis, ascis clavatis, 

 sporidiis oblongis uniseptatis medio constrictis. (Tab. LXYII. Kg. I.) 



Hab. Lord Auckland's group and Campbell's Island ; on the leaves of Veronica elliptica, Forst. 



Hypogena, nigra, nitida ; maculis \-\ lin. latis, gregariis, orbicularibus, quandoque confluentibus, depressis, 

 subinnatis, tenuibus, minutissime granulatis. Stroma tenue, subtus cum parenchymate confusum. Cellulee fructifem 

 globosae, ostiolo punetiformi. Asci clavati. Sporidia oblonga, quandoque curvata, uniseptata, medio constricta. 



In some leaves the spots are very numerous, in others they are but few and of a larger size. The species is 

 most allied to the D. amphimelana, Mont., and D. ZoUingeri, B. and M., although not very near either ; it exhibits, 

 also, some affinity with D. granulosa, Hook, et Am. Externally it strongly resembles the punctiform variety of 

 Rhytisma salicinum. The spots are of a shining black, and are very minutely granulated under a lens. 



Plate LXVII. Fig. I. — 1, a sprig of Veronica elliptica, covered with the parasite, of the natural size; 2, a 

 section, slightly magnified; 3, ditto, more highly magnified; 4, asci; 5, sporidia : magnified. 



7. ASTEKOMA, Dec. 



1. Asteroma dilatatum, Berk.; superficiale, maculis riccia^formibus, lobis dilatatis e filamentis serpen- 

 tibus approximatis in membranam-congestis. (Tab. LXVIII. Fig. VII.) 



nigrse, non tamen nitidae, rugosiuscula;, granulatee, intus nigra?, substantia sub lente fusca. Cellules fructiferce ellip- 

 tica;, albo-farctee, ostiolo papill<eformi. Asci oblongi, basin versus latiores. Sporidia oblonga, uniseptata. 



A very fine species, allied to D. amphimelana, Mont., D. Rutce and JD. puccin hides. The first of these is more 

 regular and innate, besides having a spot on the imder side opposite to that on the upper ; whereas, in the present 

 species, in consequence of the superficial mode of growth, there is no such spot. I). amphimelana has no evident 

 border to the stroma. B. Btetts has uuiseptate sporidia, but they are short and brown ; in which respect also D. 

 bullata differs from D. puccinioides, and in several other characters from both, as its much larger size. 



2 M 



