HYDROZOA AND CTENOPHORA. 
Ccel. 5 
very large specimens of branches of Didymograpti and Tetragrapti , 
evidently fragments, but attaining a foot in length. 
21. Jickeli, C. F. Vorlaufige Mittheilung fiber das Nervensystem der 
Hydroid-polypen. Zool. Anz. v. pp. 43 & 44. 
22. . Uber Hydra. L. c. pp. 491-493. 
23. . Der Bau der Hydroid-polypen. I. Uber den histiologischen 
Bau von Eudendrium, Ehbg., und Hydra, L. Morph. JB. viii. 
pp. 373-416. 
This is the first of a series of papers which will contribute largely to 
our knowledge of the minute histology of Hydroid-polyps, more especially 
with regard to their nervous system. 
24. Jung, H. Beobachtungen fiber die Entwickelung des Tentakel- 
krauzes von Hydra. Morph. JB. viii. pp. 339-350. 
The author has examined a large number of specimens belonging to 
the three species, II. grisea , II. oligactis , and H. viridis , and finds that 
while there is no fixed law respecting the order of development of the 
tentacles, a typical Order may be recognized for each species, to which a 
large number of individuals conform. 
25. Korotneff, A. Zur Kenntniss der Siphonophoren. Zool. Anz. v. 
pp. 360-363. 
The author has examined Forskalia ophiura, Agalma rubra, Apolemia 
uvaria, and Hippopodius gleba, to ascertain if a nervous system such as 
has been described in other Ilydrozoa exists in the Siphonophora ; and has 
come to the conclusion that it does. 
26. Lankester, E. Ray. Further observations on the Fresh- water 
Medusa ( Limnocodium sowerbii ), made during the summer of 1881. 
Nature, xxv. pp. 444-446. 
27. . The Chlorophyll Corpuscles of Hydra. Op. cit. xxvii. 
pp. 87 & 88. 
28. Lendenfeld, R. von. Uber eine Obergangsform zwischen Semo- 
stomen und Rhizostomen ( Pseudorhiza aurosa , g. & sp. nn.). Zool. 
Anz. v. pp. 380-383. 
29. . Uber Coelenteraten der Sfidsee. 1. Cyanea annaslcala , sp. n. 
Z. wiss. Zool. xxxvii. pp. 465-552. 
The author gives a most elaborate description of the whole anatomy of 
this form. 
30. Marshall, W. Uber einige Lebenserscheinungen der Sfisswasser- 
polypen, und fiber eine neue Form von Hydra viridis. Z. wiss. Zool. 
xxxvii. pp. 664-702. 
31. Meresciikowsky, C. de. Sur les Nematophores des Hydroides. 
Bull. Soc. Z. Fr. iii. & iv. pp. 280 & 281. 
32. . Structure et d^veloppement des Nematophores chez les 
Hydroides. Arch. Z. exper. x. pp. 583-610. 
The author has come to the conclusion that the Nematophores are 
degenerate individuals. 
