HYDROZOA AND CTENOPHOEA. 
Goeh 7 
45. Richiardi, S. Idroidi del mare di Toscana, in Catalogo della 
Sezione Italiana dell’ Esposizione internazionale di pesca in Berlino, 
1880, pp. 154 & 155. 
[Not seen by the Recorder.] 
46. Romanes, G. J. The Physiology of the Fresh-water Medusa, 
Nature, xxii. p. 191. 
Refers to Limnocodium sowerhii [infra, p. 8]. 
47. Savarinski, P. [A Russian paper supplementing Kleinenberg's 
monograph on Hydra.'] 
48. Studer, T. Ueber scheinbare Knospen an Herpetnlitha Umax. SB. 
nat. Fr. 1880, pp. 173 & 174. 
49. Tenison-Woods, J. E. On the Anatomy of Distichophora, with a 
Monograph of the Genus. J. R. Soc. N. S. Wales, xiii. [1879], 
pp. 49-63, 2 pis. 
Describes 11 species of Distichophora as living in Australian Seas, and 
gives full and historical references. 
50. Weismann, a. Zur Frage nach dem Ursprung der Geschlechts- 
zellen bei den Hydroiden. Zool. Anz. hi. pp. 226-233 (pt. 1) & 
367-370 (pt. 2). 
The author shows the endodermal origin of ova in the Pennularidm 
and Sertularidre^ and proposes to divide Hydroids into two groups accord- 
ing to the development of the generative cells in the coenosarc (Coenogenous 
Hydroids) or in primary individuals (Blastogenous Hydroids). 
51. Wilson, C. B. The Early Stages of Renilla. Am. J. Sci. (3) 
XX. pp. 446-449, pi. 
52. Winther, G. Fortegnelse over de i Danmark og dets nordlige 
Bilande fundna Hydroide Zoophyter. Nat. Tids. xii. pp. 223-278. 
53. Young, J. The Spiral Character of Cmlenterate Development, 
Ann. N. H. (5) v. p. 212. 
Sub-Class HYDROMEDUSiB. 
Order i., Gymnoblastea-Anthomedusac. 
Codonium conicum, sp. n., Haeckel, (23) p. 634, Zweiter Nachtrag, 
Indian Ocean. 
Ilydrodendrium,, g. n.. Carter, (6) p. 454, for II. sjnnosum, sp. n,, id. 
ibid. pi. xix. figs. 8 a-g. 
Hydrella ovipara^ sp. n., Goette, (17) p. .352, figs. 1 & 2, Naples. 
Undergoes a degeneration of some of its polypes at the period of sexual 
maturity ; the ova are developed from the endoderm and within the 
stalk. 
