278 Scientific Intelligence. 
the Joggins) described by Mr. Marsh; and he suggests that the Hosau- 
rian vertebre may have belonged to a Labyrinthodont, or to a species 
between a Labyrinthodont and an lehthyosaurian The best preserved 
rib is 64 inches long and half an inch bro 
The two types of species which have Seon ‘called Labyrinthodonts are 
at of the Arcuecosaurs [Ganocephala of Owen, but true Ganoids ac 
cording to Agassiz}, most abundant in the Carboniferous; and that of the 
Masroponsaurs (genera, Mastodonsaurus, Labyrinthodon, Capitosaurus, 
Trematosaurus), common in the Triassic. 3 had, as von 
Meyer has proved, a persistent branchial sapivaiex “Nothing is — 
as to whether this was true or not of the Mastodonsaurs. With r 
with noe — to the Raniceps of ‘Wyman and the Hylerpeton of Owen, 
Prof uxley remarks that it is not aos safe to decide whether their 
affinities. are Archegosaurian or Mastodonsaurian. 
- 4. Anniversary Address before the Geological Society of London, Feb. 
20, 1863, by Prof. A. C. Ramsay, President of the Society. 26 pp. 8vo. 
bers deceased during the sa ggg Trench, Dr. C. C, v. ebestoall 
Robert Raid, Rev. James Cumming, J. C. Nesbit, Dr. H. G. Bronn, B. de 
Doue, Dr. T. S. Trail and Marquis of Breadalbane,—takes up the topic of 
his discourse—Breaks in the succession of the British Paleozoic strata. 
8. On the production of crystalline Eiiwsone by heat.—In this Journal, 
vol, xxxii, p. 112, an abstract is given of Rose’s ex xperiments on the 
deportment of carbonate of lime at a high temperature. inte other 
Further, “that the so-called crystalline marble, obtained by Sir James 
Hall in his experiments, was — bly nothing more than a slight 
coherent but otherwise unaltered mass, which Hall erroneously co. 
to - crystalline marble.” 
tates, in a recent communication to the Berlin Academy of 
iiiecees, that he was not entirely satisfied with his former res 
especially as Dr. Horner, President of the Geological Society of f Londot, 
assured him that he had inspected the specimen of marble made by Sit 
James Hall, and that it differed entirely from the amorphous pr 
bj 
from those he formerly published, and which fully confirm the correctness 
of Sir James Hall’s conclusion, that marble can be produced by exposing 
