,8^. NOTES AND COMMENTS. 337 



numerals. The value of the Catalogue is much enhanced by the 

 dates, localities, and references to published works included under 

 each specimen, with frequently interesting notes on the history or 

 properties of the plant in question. 



An important memoir on the Petroleum and Ozokerite of Galicia, 

 by Mr. Boverton Redwood, appears in the Jotmi. Soc. Chemical 

 Industry (vol. xi., No. 2). Petroleum occurs in the "Carpathian 

 Sandstones," the upper member of which is Eocene, the lower being 

 Neocomian ; in the upper Eocene or Oligocene ; and in the Miocene 

 beds. Ozokerite is found in small quantities in the older strata, but 

 the main deposits are in the Miocene of Boryslaw. This material is 

 extracted by shafts ; while the petroleum is pumped from bore-holes. 

 The strata are much folded, and are sometimes slightly inverted. 

 The more productive areas for petroleum are frequently along anticlinal 

 folds. Mr. Redwood's memoir is rendered much more valuable by the 

 addition of a general map of Europe, on which all the principal 

 petroleum fields are marked. 



Something will happen to the President of the Royal Society, 

 for has not Dr. Irving, in the June number of the Geological Magazine, 

 remarked "there can be no necessity for pointing out the importance 

 of this dictum from the pen of Lord Kelvin ; it supports my own 

 contention." It is not often that mortal man receives such a com- 

 pliment as this. 



In our May number (p. 169) we announced that a Catalogue of 

 the Gasteropoda of the Inferior Oolite would shortly be published by 

 Mr. Hudleston ; we should have stated that the work is the joint 

 production of Mr. Hudleston and Mr. E. Wilson, and that it is a 

 Catalogue of the British Jurassic Gasteropoda. 



The last part of the Transactions of the Zoological Society (vol. xiii., 

 pp. 165-175, pi. xix., 1892) is devoted to a description by Mr. E. T. 

 Newton of a finely-preserved skull of the gigantic extinct Beaver-like 

 animal {Trogontherium) from the Forest-bed of the Norfolk Coast. As 

 our readers are probably aware, the genus Trogontherium was originally 

 described upon the evidence of a skull from the superficial deposits of 

 Siberia described as long ago as the year 1809; and, although most 

 of those entitled to speak with authority on the subject have been 

 convinced of their identity, the remains of the giant beaver hitherto 

 obtained from the Norfolk Forest-bed have been too imperfect to 

 render it absolutely certain that they belonged to the same species as 

 the Siberian animal. The skull now so ably described by Mr. Newton 



