No. 4 January, 1921] CYTOLOGY '217 



1476. Brown, Elizabeth Dorothy Wuist. The value of nutrient solutions as culture 

 media for fern prothallia. Torreya 20: 76-83. 2 fig. 1920. — The work of growing fern pro- 

 thallia for class use is greatly simplified by the use of nutrient solutions. The following were 

 found useful in the germination and development of various Polypodiaceac; Beijerinck's, 

 Birner and Lucanus's, Knop's, Prantl's, Sachs's. The composition of each is indicated. 

 It is best to make a liter of the solution, which it is not necessary to sterilize. Glass capsules 

 holding about 26 cc. are best suited for solution cultures. Ferns with monoecious prothallia 

 are best adapted for the work. After drying, the sporangia are crushed and the spores sepa- 

 rated with bolting-cloth. After the cultures are made, they should be exposed to direct sun- 

 light. The optimum temperature for prothallia is 60° F. — J. C. Nelson. 



1477. Phillips, E. P. The importance of a properly equipped state herbarium to an 

 agricultural country. South African Jour. Nat. Hist. 2: 18-39. 1920. 



CYTOLOGY 



Gildert M. Smith, Editor 

 G. S. Bryan, Assistant Editor 



1478. Allen, Ezra. Studies on cell division in the albino rat (Mus norvegicus var. 

 alb.). III. Spermatogenesis: the origin of the first spermatocytes and the organization of the 

 chromosomes, including the accessory. Jour. Morph. 31: 133-185. 58 fig. 1918. — See Bot. 

 Absts. 5, Entry 1421. 



1479. Church, A. H. Historical review of the Florideae. II. Jour. Botany 57: 329-334. 

 1919. (Continued from Ibid. 57: 304.)— See Bot. Absts. 5, Entry 598. 



1480. Conklin, E. J. The mechanism of evolution. Sci. Monthly 10: 392-403, 496-515. 

 1920— See Bot. Absts. 5, Entries 1986, 1987. 



1481. Dangeard, P. A. La structure de la cellule vegetale et son metabolisme. [The 

 structure of the plant cell and its metabolism. | Compt. Rend. Acad. Sci. Paris 170: 709-714. 

 1920. — A comparison of the three categories of chondrial elements of Guilliermond with the 

 three categories of the author. He criticizes Guilliermond for including under the term 

 mitochondria all cell elements giving the mitochondrial reaction, regardless of their origin or 

 development. He repeats his contention that anthocyan and tannins are formed from the 

 metachromatic bodies of the vacuome. — C. H. and W. K. Far. 



1482. Delage, Y., and M. Goldsmith. Le mendelisme et le mecanisme cytologique de 

 l'heredite. [Mendelism and the cytological mechanism of heredity.] Rev. Sci. Paris 57: 97-109, 

 130-135. 1919.— See Bot. Absts. 5, Entry 1483. 



1483. De Winiwarter, H. Les mitoses de Perithelium seminal du chat. [Mitoses of the 

 seminal epithelium of the cat.] Arch. Biol. 30: 1-87. 1 pi., 84 fig. 1919.— See Bot. Absts 5, 

 Entry 351. 



1484. Doncaster, L., and H. G. Cannon. On the spermatogenesis of the louse (Pedi- 

 culus corporis and P. capitis), with some observations on the maturation of the egg. Quart. 

 Jour. Microsc. Sci. 64: 303-328. 1 pi., 1 fig. 1920.— See Bot. Absts. 5, Entry 1489. 



1485. Gatenby, J. Bronte. The cytoplasmic inclusions of the germ-cells. VI. On the 

 origin and probable constitution of the germ-cell determinant of Apanteles glomeratus, with a 

 note on the secondary nuclei. Quart. Jour. Microsc. Sci. 64: 133-153. 1 pi., 10 fig. 1920. — 

 See Bot. Absts. 5, Entry 378. 



1486. Goldsmith, William M. A comparative study of the chromosomes of tiger beetles 

 (Cicindelidae). Jour. Morph. 32:438-487. PL 1-10. 1919.— See Bot. Absts. 5, Entry 3S2. 



