10 Gcel. 
CCKLENTBHATA. 
Sea, with a short description of other new Hydroids. Ann. N. H. 
(4) XX. pp. 220-229, pis. v. & vi. 
11. Moseley, H. N. On the structure of a species of Millepora occur- 
ring at Tahiti, Society Islands. Phil. Tr. clxvii. pp. 117-135, pis. 
ii. & iii. 
12. Plessis, G. DU. Remarques sur la coloration des Hydros, it propos 
de quelques hydros vertes accidentellement teintes en rose. Bull. Soc. 
Vaud. XV. No. 78, pp. 117-120. 
14. Romanes, G. J. Further observations on the locomotive system of 
Medum. P. R. Soc. xxv. pp. 464-487. {Cf. also the author’s “ Evolution 
of nerves and nerve-systems”; Nature, xvi. pp. 231-233, 269-271, 
289-293.) 
15. Saks, M. Nye og mindre bekjondte Cwlenterata. Fauna littoralis 
Norvegios, iii. pp. 1-32, with pi. 
[A posthumous paper, written years ago.] 
16. Schulze, F. E. Spongicola fistularis^ ein in Spongien wohnendes 
Hydrozoon. Arch. mikr. Anat. xiii. pp. 795-817, xlv.-xlvii. 
17. Spagnolini, a. Catalogo sistematico degli Acalefi del Mediterraneo. 
Sifonofori e Meduse craspedote. Atti Soc. Ital. xix. 46 pp. pis. i.-vi. 
18. Taschenberg, E. Anatomic, Histologic und Systematik der Cyli- 
cozoa. Z. ges. Naturw. (3) i. pp. 1-104, pis. i.-iv. 
Notes on fish-sheltering Medusae, by E. Lawless, G. J. Romanes, and 
T. Gill, Nature, xvi. pp. 227, 248, & 362. 
Generalities. 
Eimer’s note (6) on the artificial divisibility and the nervous system 
of Medusae is the precursor of an elaborate memoir, and can therefore here 
only be recorded provisionally. The nervous system is evidently ana- 
logous to that in Beroe, as demonstrated by the same author [Zool. Rec. 
X. p. 515] ; it is a differentiation of the ectoderm and its dependencies, 
increasing in strength in certain regions, especially towards the margin of 
the disk, either in its whole circumference ( Get'yonidce), or particularly in 
the vicinity of the marginal corpuscles (^Acraspedotd), 
Olaus (4) enumerates some of the Medusaria, Siphonophora, and Cteno- 
phora of Trieste, characterizing shortly some new genera {vide infra). 
The Hydroids recorded as being from Iceland [Zool. Rec. xi. p. 527] were 
probably collected in Davis Straits, off Frederikshaab, Greenland, in 100 
fathoms (Hincks, 9, b) ; a few Hydroids from Reykjavik Harbour are 
noticed. Five species of Hydroids are noticed in Marenzeller’s account 
of arctic Radiata and Vermes (vide suprd^ p. 8). 24 Californian and 
Vancouver-Island species are enumerated by Clark (3). Spagnolini 
(17) catalogues the Siphonophora and craspedote Medusae of the Mediter- 
ranean, with notes on their occurrence. Among the 71 species of Hy- 
droids dredged between Florida and Cuba (1), the large majority (64) were 
new, and several belong to new generic combinations : 9 gymnoblastic and 
56 calyptoblastic species (10 Campanulariidaef 17 Sertulariidoe, and 28 
Plumulariidce), 
