176 Miscellaneous. 
from the Wenlock of Dudley, is taken as the type of a new genus 
Arcanopora. 
The authors then remarked upon the characters on which the 
classification of the Polyzoa is founded, drawn from the study of the 
recent forms, and stated that throughout the Cainozoic and Mesozoic 
series no Polyzoa are known which cannot be referred to the recog- 
nized groups. Many Paleozoic forms are in a different case. The 
orifices seen on the surface are not, in many instances, the mouths 
of the cells, but those of what the authors call vestibules, beneath 
which the true cell-mouth is concealed. For these types they 
propose to found a new suborder under the name of CryprostomaTa, 
and characterized by having the zocecia subtubular, or, in section, 
slightly angular, and the orifice surrounded by a vestibule or other- 
wise concealed. The families referred to this group are the Ceramo- 
poride, Ptilodictyide, and Arcanoporide. 
MISCELLANEOUS. 
Notes on the Luminosity of the Sea, taken on the West Coast of Nor- 
way from September 1881 to April 1882. By W. EH. Kocs, B.A., 
F.G.8. 
I trust the following notes may be of interest to naturalists, al- 
though I fear there is nothing new about them. 
During my travels I was much struck by the almost constant. 
luminosity of the waters: but I also noticed great variations in its 
intensity ; sometimes it was quite as brilliant as I have ever seen it 
in southern climes, at others much fainter. It struck me that some 
of the flashes of light emitted by certain forms resembled the steel- 
blue spark of an electric machine; hence I was led to try certain 
experiments with magnetized needles in buckets of water. The 
results obtained were decidedly disappointing; but nevertheless I 
feel sure that a great deal of the so-called phosphorescence is due to 
animal electricity, and I hope some one more competent and better 
fitted out than myself may undertake this line of research. Another 
fact which seems to fall in with this idea is that during thundery 
weather and displays of the aurora borealis the luminosity was 
most intense. 
The highest temperature registered at night at the surface-water 
was 45° F., the lowest 32° F.; and on both occasions the luminosity 
was equally brilliant. 
The small light-emitting animals were of the usual types (Hydro- 
meduse, Meduse, Ctenophora, &c.); but many were embryonic 
forms quite unknown to me. 
To quote from my diary :— 
‘“‘ September 14, 1881. Weather cold and windy (west wind). 
Waters crowded with medusoid forms; and all the way from Sta- 
vanger to the Lysefjord (15 English miles) the luminosity was most 
marked. 
_ “September 29, 1881. East wind, fine and cold. Waters extra- 
ordinarily clear, so that forms of life could be easily distinguished 
