178 
THE GEOLOGIST. 
tain held its own ; then, all at once, appeared to lose its ascending 
energy. The unstable waters faltered, drooped, fell, ' like a broken 
purpose,' back upon themselves, and were immediately sucked down 
into the recesses of their pipe." 
The writer does not consider this to have been a first-rate specimen 
of an eruption. From first to last it did not occupy more than seven 
or eight minutes, and the extreme height of the column of water did 
not exceed seventy feet, whereas jets have been actually measured 
which have attained a height of upwards of a hundred feet. 
As to the moving power through whose agency this phenomenon 
takes place, we must refer our readers to any good treatise on Geology 
which they may happen to possess. 
These "Letters from High Latitudes" contain many other most 
interesting geological notices, penned in the same agreeable style. 
ON SOME NEW PALEOZOIC CRINOIDS FROM ENGLAND 
AND SCOTLAND. 
By Pkofessoe L. de Koninck, of Liege. 
(From lite " Bullet. Acad. Roy. Bruxelles," 2 Ser. tome IV. p. 93.) 
{Conlinued from page 149.) 
The two following species appear to me to be new, and come likewise 
from the carboniferous limestone : — 
1. Hydreionocrinus Woodianus. Be Koninck. PI. IV. fig. 5, ba. 
The head of this species is of medium size, sub-cylindrical in form, aud termi- 
nated at its upper part by a crown composed of fifteen pieces, disposed in a circle, 
and attached one to another, the central space being occupied by the dome. 
The calix, taken by itself, resembles a little open cup. The base is composed of 
rather small plates, most of which have a point attached to the stem. The mh- 
radial plates, with the exception of that on the anal side, are much broader 
than long They are very thick and strongly arched, and consequently 
their sutures are very decidedly exhibited. The first radial plates are 
pentagonal in shape, about a third broader than long, aud, like the 
