ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
59 
The ascogenous cell of Ascobolus corresponds to the cell from which 
most, and probably all, the ascogenous hyphse of Erysiphe spring, and to 
the ascogenous cell of Sphserotlieca. In the two latter genera a portion 
of the nucleus resulting from the division of the fertilised oosphere has 
a purely vegetative function, and finally disappears, the other portions 
forming the ascospore ; while in Ascobolus , the entire contents of the 
ascogone are used up in the production of the ascospores. The asco- 
genous hyphse of Erysiphe and Ascobolus are undoubtedly of the same 
morphological value; and the formation of asci from these hyphse presents 
essentially the same process in both. In the case of the Erysiphete at 
least we may assume that the ascus-fructification is a non-sexual spore- 
fruit, originating from an impregnated oosphere. 
Reproduction of Spheerotheca iCastagnei.* * * § — M. P. A. Dangeard 
confirms the statement of Harper, that a fusion takes place between the 
two nuclei of the ascus in this fungus ; but disputes his assertion that 
the ascus is itself the result of the conjugation of a nucleus derived from 
an antherid, and the nucleus of the oogone. 
Tuberacese.f — Parts 57, 58 of Rabenhorst’s Cryptogamic Flora of 
Germany are mainly occupied by a monograph, by Dr. E. Fischer, of the 
German Tuberaceoe. The order is divided into three families, viz. : — 
(1) Eutuberineae ; receptacle with passages either hollow or filled with a 
weft of liyphae (less often a single cavity), opening outwards, the walls 
covered by the ascogenous layer ; (2) Balsamiese ; receptacle with hollow 
closed chambers, not opening outwards, the walls covered by the asco- 
genous layer ; (3) Elaphomycetineae ; asci imbedded in clusters or bands, 
or regularly distributed through the receptacle. The Eutuberineae com- 
prise the genera Genea (6 spp.), Hydnotrya (3), Stephensia (1), Pachyphloeus 
(3), and Tuber (16). The Balsamieae are composed of the single genus 
Balsamia, with 3 spp. The Elaphomycetineae include Thjdnobolii.es 
(3 spp.), Choiromyces (1), Terfezia (1), Picoa (3), Elaphomyces (21), and 
Onygena (5 spp.). The small group of Hemiasceae — Ascoidea (1 sp.), 
Protomyces (4), Monascus (3) and Endogone (4 spp.) — follows. The 
illustrations are numerous and excellent. 
Fructification of Antennaria4 — In addition to the forms of fructi- 
fication of Antennaria scoriadea already known, Dr. Neger describes a 
new one, found on several trees in Chile, on which the fungus is parasi- 
tic. It resembles a conidial form of Cladosporium Fumago , known as 
coniothece, and consists of small black cushions, resembling peritheces, 
from the margin of which multicellular bodies become detached, and 
these develope, in certain conditions, into a mycele. 
Parasitic Fungi. — M. E. Prillieux§ traces a destructive disease of 
the chicory to Phoma albicans , the pycnid generation, of which Pleospora 
albicans is the perithecial form. 
Herr G. Wagner II confirms the observation of Magnus of the identity 
* Le Botaniste (Dangeard), v. (1896) pp. 27-31. Cf. this Journal, 1896, p. 339. 
t ‘ Kryptogamen-Flora v. Deutschland u.s.w.’ (Rabenhorst), l er Bd., 5 te Abt., 
Lief. 57, 58, Leipzig, 1896, 131 pp. and many figs. 
X Centralbl. f. Bakteriol. u. Parasitenk., 2 te Abt., ii. pp. 613-5. 
§ Bull. Soc. Mycol. France, 1896, p. 82 (1 fig.). See Bot. Centralbl., lxvii. 
(1896) p. 215. || Ber. Deutsch. Bot. Gesell., xiv. (1896) pp. 212-5. 
