ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 781 



little branched. The sporophore appears first as a small spherical 

 eminence which becomes divided off by a septum from the mycelial cell. 

 The sporophores bear at their summit the spores or conidia, which are 

 unilocular and cylindrical. 



Fungus Parasitic on the Salt-fish.* — Herr J. Brunchorst describes 

 a mould-fungus parasitic on the salt-fish, and very destructive to it 

 {Torula pulvinata Sacc, Wallerina ichthyophaga Johan-Olsen). It forms 

 on the skin brownish, more or less hemispherical patches 1-3 mm. in 

 diameter, or a brownish coating. It produces conidiophores, from 

 which are abstricted brown spherical smooth conidia 4-5 /x. in diameter, 

 which, on germinating, divide into a kind of parenchymatous tissue 

 which produces root-like hyph^ and flask-shaped conidiophores, 



"Rouge" of the Scotch Fir.f— According to MM. Bartet and 

 Vuillemin, the disease which is exceedingly destructive to Scotch firs in 

 the neighbourhood of Nancy, known as " rouge," is quite distinct from 

 the " rouille," and probably identical with that known in Germany as 

 " Schiitte." It makes its appearance in the form of brown spots on the 

 leaves, the spermogonia of Leptostroma Pinastri Desm. The best 

 remedy for the disease they found to be the use of " bouillie bordelaise," 

 a preparation containing copper, which is also very efficacious against the 

 Peronospora of the vine and of the potato. 



Parasites of the Peridiniese.l — According to M. A. Dangeard, the 

 Peridiniese form a very interesting group, but as yet imperfectly known. 

 The species which furnished a good part of the material for this paper 

 was Glenodinium cinctum Ehrb., which is very common in fresh water. 

 The body of this species is covered with a membrane of cellulose, its 

 anterior part being shorter than the posterior; under the membrane 

 yellow chromatophores may be seen. Multiplication takes place by 

 longitudinal division, and spherical resting-spores having ^ a thick 

 membrane are formed. 



The author then goes on to discuss the nature of the endogenous 

 germs which exist in the Peridinieee. In the case of Glenodinium cinctum 

 the protoplasm incloses from one to four germs, and sometimes even a 

 greater number may be observed ; these germs are spherical or sometimes 

 elliptical, and after a time give rise to an Olpidium. The endogenous 

 germs do not belong then to the Peridinieae, but are parasitic structures. 

 The author describes various species of Chytridium in which the 

 sporangia remain exterior to the host. G. echinatum was met with on 

 Glenodinium cinctum ; it is easily distinguished by the form of its 

 sporange. The genus Chytridium can be divided into three sections, in 

 the first two there is only one opening in the sporange for the escape of 

 the zoospores, while in the third there are several. 



Disease attacking' Ainygdale3e.§ — M. P. Vuillemin describes a 

 disease which attacked various Amygdaleae in Lorraine in 1887. The 

 first examination revealed the parasitic nature of the disease ; the 

 laminae of the leaves, petioles, and fruits were found covered with more 

 or less numerous spots. If one of the spots is examined the spore may 



* Norsk Fiskeritidende, 1886, pp. 136-60, and 1888, pp. 65-80 (2 fio-s ) (Nor- 

 wegian). See Bot. Centralbl., xxxiv. (1888) p. 133. 

 t Comptes Rendus, cvi. (1888) pp. 628-30. 

 X Morot's Journ. de Bot., ii. (188S) pp. 126-32, 141-6 (1 pi.), 

 § Soc. Bot. et Mycol, de France, Session Cryptogamique, 1887 (1888) pp. 40-7, 



