ZOOLOaY AND BOTANY, MICROSCOPY, ETC. 69 



the boundaries of species, that we are thereby apt to lose some con- 

 necting links, and that, at any rate, we can always unite species. 



Reproduction of Euglypha alveolata.* — Dr. A. Gruber makes the 

 remarkable observation that the shell-covering of the young of this 

 Protozoon is formed by the mother. When one of these creatures is 

 about to reproduce itself, protoplasm is to be seen passing out from 

 the orifice of the shell, which is shortly followed by the highly 

 refractive, disk-like bodies which lie beside the nucleus of the 

 parent ; these cover the protoplasm already extruded. Sometimes 

 the young is matured within the space of an hour, and is then found 

 with its orifice lying close to its parent. A strange phenomenon still 

 remains ; the young has still to obtain its nucleus, and that it does 

 direct from the mother, whose nucleus is at this period much larger 

 than ordinarily. Gradually beginning to extend, the nucleus finally 

 equals the whole cell in length ; it then becomes constricted ; the 

 posterior portion is withdrawn into the mother, while the anterior 

 part passes into the daughter-cell. Then there occurs in both cells 

 an active streaming movement, during which the nucleus is much 

 less apparent ; after half an hour this streaming ceases, and the two 

 nuclei are apparent, and have taken up their typical position. This 

 division of the nucleus after that of the protoplasm is, as Professor 

 Gruber remarks, worthy of especial attention. 



BOTANY. 



A. GSNERAL, including Embryology and Histology 

 of the Phanerogamia. 



Fertilization of Cobsea scandens.t — W. Behrens describes the 

 mechanism of fertilization in C. scandens, commonly cultivated in 

 greenhouses in this country, which is effected by humble-bees, especi- 

 ally Bombus muscorum, and draws a very interesting comparison with 

 the mode of fertilization in Cohcea pendidijlora of Caracas, as described 

 by A. Ernst. :|: Both species are apparently absolutely dependent on 

 cross-fertilization, all attempts at self-fertilization having failed. 



Multinucleated Cells in the Snspensor of some Leguminosae. § 

 — In pursuance of the recent observations of Schmitz, Treub, and 

 others || as to the occurrence of several nuclei in the cells of certain 

 Algse, and in those of the laticiferous vessels and liber-fibres, and in 

 unison with those of Hegelmaier to the same efi"ect in the suspensor 

 of some dicotyledons,^ M. L. Guignard describes the occurrence of 

 several nuclei in the cells of the suspensor of certain LeguminossB 

 belonging to the tribe Viciese. 



In Vicia pisiformis and other species, Orobus angustifoUus, aureus, 



* Zool. Anzeig., iii. (1880) pp. 582-4. 



t Flora, Ixiii. (1880) p. 403. % See this Journal, iii. (1880) p. 822. 



§ Bull. See. Bot. France, xxvii. (1880) pp. 191-3. 



II See this Journal, ii. (1879) p. 606; iii. (1880) pp. Ill, 303, 482, 493. 



H Ibid., iii. (1880) p. 979. 



