ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 367 



irregularis, Montanensis, graminis, and rubigo-vera — in which the teleuto- 

 spores exhibit great variation in the number and position of the septa. 

 The writer traces, in this variation, the evolutionary development of 

 several genera of Uredineas, — Uromyces, Puccinia, Triphragmium, and 

 Phragmidium. 



Mannite in the Tuberacese.* — Prof. 0. Mattirolo has extracted from 

 a number of different species of Tuberaceaa — Tuber excavatum, Elapho- 

 myces variegatus, &c. — a substance identical in properties and in chemical 

 composition with the mannite of the mountain ash C 6 H U 6 . It can be 

 crystallised out from an aqueous solution in the form of small white 

 shining needle-like crystals. 



Poisonous Property of Pleurotus olearius. f — According to Prof. 

 G. Arcangeli, this alleged poisonous fungus is readily eaten by the larvaa 

 of some insects, and by snails, without appearing to do them any harm. 

 Although rabbits refuse it in the wild state, it does not appear to have 

 any special injurious effect upon them in small quantities. With dogs 

 it acts as an emetic, as it does with man. 



Pigments of Amanita muscaria. J — M. A. B. Griffiths gives the 

 formula for the green pigment of the " fly amanita " as C 29 H 20 O 10 , and 

 for the red pigment C 19 H 1S 6 . 



Mycorhiza of Pyrola.§ — Herr 0. Kramar describes the mycorhizse 

 of Pyrola rotundifolia and minor, which combine the characters of 

 an ectotropic and an endotropic mycorhiza, developing intracellular 

 hyphae, and also forming a conspicuous mantle outside the root. The 

 roots of P. minor often have the coral-like appearance characteristic of 

 roots infested with mycorhiza; those of P. rotundifolia swell up into 

 tubers. The root-cap is greatly reduced, and root-hairs are usually 

 altogether wanting. 



Mycorhiza of Hepaticse. || — Dr. B. Nemec finds an endophytic 

 mycorhiza in all the species of Jungermanniaceae examined, with the 

 exception of Jungermannia bidentata. In some species, however, it 

 appears to occur only in special conditions. In the Marchantiaceae, on 

 the other hand, no symbiont could be detected. The mycorhiza of Caly- 

 pogeia trichomanis is described in detail. The plant was infested with 

 numbers of the receptacles of Mollisia Jungermannise (Pezizeaa), but a 

 genetic connection between this fungus and the mycorhiza could not be 

 determined with certainty. 



Thallophyte Blood-Parasite .^[— Dr. E. W. Tunzelmann states that 

 he has found in the blood of persons residing in China a parasite which 

 he presumes to be causally connected with a febrile disorder widely 

 endemic in this region. The parasite is a fungus exhibiting branched 

 hyphae and spores. The spores, which are enveloped in a thick struc- 

 tureless membrane, are of three kinds : zoogonids, tubular bodies open 



* Malpighin, xiii. (1899) pp. 154-5. 

 t Atti Soc. Toscana Sci. Nat., xii. (1900) pp. 22-8. 

 j Comptes Rendus, exxx. (1900) p. 42. 



§ Abhandl. Bohm. Akad. Prag, viii. No. 29, 28 pp. and 1 pi. See Bot. Centralbl., 

 lxxxi. (1900) p. 376. 



|| Ber. Deutsch. Bot. Gesell., xvii. (1899) pp. 311-17 (1 pi.). 

 1 Journ. of Pathol, and Bacteriol., vi. (1900) pp. 356-67 (1 pi). 



