5 Gcel 
CCELENTEKA.TA. 
und Histoligie der Lucernarieii. Morph. JB. v. pp. 141-16G, 
2 pis. 
Kling describes nematocysts in both ectoderm and endoderm, and 
special gland cells in the latter in addition to the ordinary flagellate cells, 
the filaments on which are said to have an important digestive function. 
The distal ends of the tentacles bear specialized ectoderm cells. The 
marginal papillm are said to resemble rudimentary tentacles. The 
generative bands arise as ingrowths of the ectoderm cells, which are at 
first hollow. 
24. Lapworth, O. On the Geological Distribution of Rhahdophora. 
Ann. N. H. (5) iii. pp. 245-257, 449-455. 
The author considers it likely that the Graptolites will fix the minor 
divisions of the deep-water beds, and determine their parallelism in areas 
now geographically separated among the Lower Palaeozoics, as the 
Ammonites do among the Jurassic rocks. If so, the study of the geo- 
logical distribution can hardly be over-estimated. 
25. Martens, E. von. Die systematische Stellung der Rippenquallen. 
Naturforscher, No. 60, pp. 470 & 471. 
[Not seen by the Recorder.] 
26. Meresciikowsky, 0. On an Anomaly among the Hydromedusce, 
and their mode of nutrition by means of the ectoderm. Ann. N. H. 
(5) iii. pp. 177-181, pi. 
The author finds this anomaly in numerous specimens of Bougainvillea 
paradoxa which he found in the White Sea (“ Studies on the Ilydroida” 
op. cit. i. 1878, p. 323). The manubrium, mouth, and stomach are totally 
aborted, a circular and four radial canals still remaining. The speci- 
mens were otherwise normal and appeared healthy, the ectoderm cells 
having taken upon themselves the function of nutrition. 
27. Moseley, H. N. On the Structure of the Stylasteridce^ a family of 
Hydroid Stony Corals. Nature, xx. pp. 339-341. [See Zool. Rec. 
XV. C(£l. pp. 17-19.] 
28. Romanes, G. J. Concluding Remarks on the Locomotor System of 
Medusae. P. R. Soc. xxviii. pp. 266 & 267. 
These deal with what the author calls “ artificial rhythm,” the sensi- 
bility of lithocysts to light, the elfect of altering the directions of the 
constant current in the muscular tissue, the ganglionic influence of litho- 
cysts at remote points, and, finally, the power of healing after incisions. 
29. Thompson, D’Arcy. On some new and rare Hydroid Zoophytes 
(Sertulariuhe and Thuiariidte) from Australia and New Zealand. 
Ann. N. H. (5) iii. pp. 97-114, 2 pis. 
The information we possess as to the Hydroid fauna of Australia and 
New Zealand, has never hitherto been gathered together and correlated. 
The species described here were obtained from various aources. Many 
specimens are from the refuse of Harvey’s great collection of Austra- 
lasian sea- weeds ; another portion from Dr. Ferd. Muller’s collection from 
Adelaide and the Gulf of St. Vincent j while the remainder were prin- 
