418 
E. R. Downing, 
Bibliography of the sex cells in Coelenterates. 
Those papers given below dealing with spermatogenesis are nearly all 
concerned only with determining the germ layer from which sex cells 
arise. 
1, 
bo 
10. 
MIE 
The exceptions are discussed in the text of the paper. 
1871. ALLMAN, G. J., À monograph of the gymnoblastic or tubu- 
larian Hydroids, London, Roy. Soc., 1871—1872. 
1743. Baker, H., An attempt towards a natural history of the 
Polyp, London. 
1743. BERNARD DE JUSSIEU, in: Actes Acad. Suède 1746, V. 8, 
p. 2141: 
1880. Brass, A., Untersuchungen der Histologie von Hydra viridis, 
in: Z. ges. Naturw., V. 53. 
1891. Braver, A., Uber die Entwicklung von Hydra, in: Z. wiss. 
Zool., V. 52, p. 167—216. 
1891. —, Uber die Entstehung der Geschlechtsproducte und die 
Entwicklung von Tubularia mesembryanthemum ALLM., ibid., 
V. 52, p. 551 —579. 
1884. Brooks, W. K., On the life history of Eutima, and on radial 
bilateral symmetry in Hydroids, in: Zool. Anz., V. 7, p. 709 
bis 2741. 
1886. —, The life history of the Hydromedusae, in: Mem. Boston 
Soc. nat. Hist., V. 3, No. 12, p. 360—430. 
1888. —, The life history of Epenthesis McCradyi, in: Stud. biol. 
Lab. Johns Hopkins Univ., V. 4. 
1891, 1892. CHuN, C., Dic canarischen Siphonophoren, in: Abh. 
Senckenb. naturf. Ges. Frankfurt, V. 16, p. 553—627, V. 18, 
p. 57—144. 
1878. CIAMICIAN, J., Zur Frage über die Entstehung der Geschlechts- 
stoffe bei den Hydroiden, in: Z. wiss. Zool., V. 30, p. 501—508. 
