Geology and Natural History. 467 



The second part of the report consists of a detailed descrip- 

 tion of the geology and vein systems of the various mines of the 

 district. w. e. f. 



8. TJie Genus Eicrinurus ; by A. W. Vogdes. Trans. San 

 Diego Soc. Nat. Hist., i, 1907, pp. 61-77, pis. i-iii. — In this paper 

 the author brings together all the species of this genus, but does 

 not attempt a final revision of them. c. s. 



9. On some Pelmatozoa from the Chazy Limestone of New 

 York ; by G. H. Hudson. Bull. 107, N. Y. State Mus., 1907, 



pp. 97-131, pis. 1-10. — Here is described in great detail com- 

 bined with much speculation, a peculiar echinoderm long imper- 

 fectly known as Plastoidocrinus car char iaedens. The author has 

 secured a wonderfully perfect individual, and as its structure is 

 neither that of crinoids nor blastoids he erects for it a new order, 

 Parablastoidea. This genus is included by Bather in his grade 

 Protoblastoidea. The other forms described are : Pachyocrinus 

 crassibasalis, Deocrinus (new) asperatus, Hercocrinus (new) with 

 the following new species : H elegans, H. ornatus, and Archaeo- 

 crinus f delicatus (new). c. s. 



10. Remarks on and Descriptions of Jurassic Fossils from the 

 Black Hills ; by R P. Whitfield and E. O. Hovev. Bull. 

 Amer. Mus. Nat. Hist., xxii, 1906, pp. 389-402, pis. xlii-lxii. — 

 In this paper are described 18 (16 new) species of marine inverte- 

 brate fossils from the Upper Jurassic of the Black Hills of South 

 Dakota. c. s. 



11. Some New Devonic Fossils ; by John M. Clarke. Bull. 

 107, N. Y. State Mus., Geol. Papers, 1907, pp. 153-291.— For a 

 number of years the New York State Geologist has been at work 

 on a study of the Lower and Middle Devonic faunas of Maine, 

 New Brunswick and Gaspe, Canada. " To insure some part of 

 the results" of his labors, preliminary descriptions of new spe- 

 cies are here presented, as follows : 18 trilobites, 2 Tentacidites, 

 4 cephalopods, 4 pteropods, 24 gastropods, 53 pelecypods, 50 

 brachiopods, 1 bryozoan, 1 coral, and 1 graptolite. This is the 

 largest addition to the Lower Devonic faunas since Hall's Palae- 

 ontology of New York, vol. iii, published in 1861. Of new 

 genera there are Gaspelichas (for a most remarkable spinose 

 genus of trilobite "equipped with cerements of mortality"), and 



Gaspesia (for a supposed brachiopod described by Billings as 



Orthis aurelia). 



Of particular interest is the large addition of pelecypods here- 

 tofore almost unknown in the American Lower Devonic. These 

 remind one strongly of the Coblenzian of Germany and of the 

 American Middle Devonic as well. Among the brachiopods of 

 special interest are several sj>ecies of coarsely plicated Pensse- 

 laeria, a development rarely seen in America, together with an 

 Amphigenia and a large Athyris. c. s. 



12. The Eurypterus Shales of the Shawangunk Mountains in 

 Eastern New York • by John M. Clarke. Bull. 107, N. Y. 

 State Mus., Geol. Papers, 1907, pp. 295-310, pis. 1-8.— Until very 



