Page:The Botany of the Antarctic Voyage.djvu/198

172 5. Sp&sria (foliicola?) depressa, Berk.; gregarea, minor, atra, peritheciis tectis subglobosis lsevibus callo destitutis siccitate depressis, sporidiis lanceolatis. (Tab. LXYIII. Fig. V.)

Hab. Campbell's Island ; on the dead leaves of Luzula crinita.

Gregaria, epidermide atro-punctato omnino tecta. Perithecia minora, subglobosa, callo destituta, siccitate depressa. Asci lineares, paraphysibus tenuioribus imm ix ti. Sporidia biseriata, lanceolata, endochromio bipartito sed non septato.

The only species with which the present can be compared are the S. duplex and S. saxifricola ; from both these it will be found to differ by the external characters given above, and, from the latter in particular, by the simple pellucid and neither triseptate nor yellowish sporidia.

Plate LXVIII. Fig. V. — 1, leaf and fungus of the natural size; 2, portion of the same, magnified; 3, asci and paraphyses ; 4, sporidia, shewing the endochrome collected at either extremity ; magnified.

6. DOTHIDEA I take the present opportunity of describing two new species of Dothidea, contained in the Herbarium of Sir Y. J. Hooker.

1. Dothidea circumscripta, Berk.; innata, gregaria, maculis suborbicularibus irregularibus depressis nigris nitidis circurnscriptis, cellulis paucis niagnis depresso-globosis, collo brevi, ostiolo papillseformi, ascis clavatis, sporidiis oblongo-lanceolatis. (Tab. LXVIII. Fig. YI.)

Hab. Andes of Columbia (Jameson). Chacapoyas, Peru (Mathews); on various species of Vaccinium.

Hypophylla, rarissime epiphylla, innata. Maculee f lin. lata?, suborbicidares v. confluentes, irregulares, depressae, nigrse, nitidae, quandoque leviter undulata?, minutissime granulata?, ostiolis paucis papillaeformibus notatse, linea nigra plus minusve evidenter circmnscriptae, demiun oinnino fatiscentes, et scutellam epidermide marginatam exhibentes. CellulcB fructiferae paucissima?, magna?, globosse, depressae, collo brevi, ostiolo papillaeformi. Asci clavati. Sporidia octona, oblonga, hinc acuminata.

A very pretty species, remarkable for the small number of fructifying cells and the dark line enclosing the stroma, which is especially evident when the latter is abortive ; beyond this line there is sometimes a coloured ring. The sporidia are almost of the same shape with those figured by Corda, in Eliytisma Eugeniacearum; when young they are filled with distinct granules which become less evident as they are more developed. In age the stroma completely decays and falls out, leaving a scutellum surrounded by the cuticle. This follows from the dark fine indicating a harder substance than that of the stroma, which is not always externally risible, but will be found on making a vertical section.

Plate LXVIII. Fig. VI. — 1, a branch of Vaccinium and fungus of the natural size; 2, a section, slightly magnified; 3, asci, slightly magnified; 4, sporidia, highly magnified.

2. Dothidea bullata, Berk.; epiphylla, bullata, suborbicularis, nigra, superficialis, crassiuscula, rugosa, granulata, intus nigra, cellulis ellipticis, ostiolo papillaeformi, ascis oblongis, sporidiis oblongis uniseptatis.

Hab. Peru; on the leaves of a resinous shrub. (Mathews.) Epiphylla, submarginalis, superficialis. Macula i unc. lata?, suborbicidares, crassiusculse, depresso-bullatae, Fries.

1. Dothidea hemhpherica, Berk.; hypogena, solitaria, erumpens, macula subeffusa epiphylla nigra, stromate hemispnerico carbonaceo, cellulis ellipticis obtusiusculis, ascis breviusculis, sporidiis uniseptatis oblongis. (Tab. LXVII. Fig. II.

Hab. Lord Auckland's group ; on the leaves of Veronica odora.