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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. Erom 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 PsorESsoK L. de Koninck, of Liege. 



{From the " Bullet. Acad. Roy. Bruxelles" 2 Ser. tome IV. p. 93.) 



{Continued from page 149.) 



The two following species appear to me to be new, and come likewise 



from the carboniferous limestone : — 



1. Hydreionocrinus "Woodiauus. De Koninch. PI. IV. fig. 5, 5a. 



The head of this species is of medium size, sub-cylindrical in form, and 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 hase is composed of 

 rather small plates, most of which have a point attached to the stem. The suh- 

 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, and, like the 



