REVIEWS 213 



sections have all been previously studied by other observers, some of 

 them frequently, and not always with concordant results. In this 

 paper, both measurements of thickness, and identification of species 

 of fossils have been made with care, and while the conclusions are not in 

 complete harmony with already expressed opinions, they doubtless 

 afford a more precise knowledge of the formations considered. 



11. Report on the Talc Industry of St. Lawrence County. By C. H. 

 Smyth, Jr. Pp. 661-671. 



1 2 . Physical Tests of the Devonian Shales of New York State to Deter- 

 mine their Value for the Manufacture of Clay Products. By H. Reis. 

 Pp. 673-698. This paper is introduced by a brief discussion of the 

 general, chemical and physical properties of shales. This is followed 

 by some notes upon the manufacture of paving brick and the requisite 

 qualities of such brick. The remaining pages are devoted to a dis- 

 cussion of the extent of the New York shales with tests of samples 

 from typical localities. 



13. The Discovery of Sessila Conularia. By R. Ruedemann. Pp. 

 699-728, plates I-IV. This important paper is based upon the study 

 of some obscure organisms found in the Utica slate at Dolgeville, 

 N. Y. As a result of the study much light is thrown upon the nature 

 and mode of development of this widespread but little understood 

 organism, Conularia, in regard to whose taxonomic position there has 

 been a widely diverse expression of opinion. Conularia has usually been 

 referred to the Pteroflpds, but the results of the investigation recorded 

 in this paper seem to indicate that it should be placed with the Cephal- 

 opods. 



1 4. Notes on Some Crustaceans from the Chemung Groicp of New York. 

 By J. M. Clarke. Pp. 731-738. In this paper are discussed two 

 crustaceans from the Chemung group, (1) Pephricaris horripilata, a 

 peculiar, highly ornamented Phyllocarid crustacean, and (2) Bronteus 

 senescens, one of the very few trilobites of this formation. 



Stuart Weller. 



Iron Making in Alabama. By W. B. Phillips. Alabama Geol. 

 Surv., Second Ed., 380 pp. 1898. 



It is not often that a state survey finds it necessary to issue a sec- 

 ond edition of any of its reports, and the fact that Dr. Phillip's well- 

 known report now appears in new form is a well deserved compliment 



