368 REPORT OF NATIONAL MUSEUM, 1884. 



On the skeleton of PJwca (Histriophoca) fasciata, Zimmerman. 



(Proc. U. S. Nat. Mus., vi, 1883, pp. 417-426, April 11, 1884. Plates xi-xiv. ) 

 Gives a description of the entire skeleton of the Ribbon Seal, based upon a 

 specimen obtained in Alaska in 1880, by Mr. Wra. H. Dall. Histriophoca is 

 regarded as a subgenus in tne genus Phoca, between Pusa and Pagophilm. 



The Lorillard Charnay collection. 



(The Century, Feb., 1884.) 



Notes upon the collection of casts of Toltec inscriptions and sculpture re- 

 cently received by the Museum. 



CHARLES DOOLITTLE WALCOTT. 

 Appendages of the Trilobite. 



(Science, iii (No. 57, March 7, 1884), pp. 279-281, 3 figures.) 

 Notes on the original specimen described by Prof. Mickleborough (Cin. 

 Jour. Nat. Hist., vi, 1883, p. 200). 



Notes on Paleozoic rocks of Central Texas. 



(Amer. Jour. Sci., xxviii, Dec, 1884, pp. 431-433.) 



Notes on the discovery of the Grand Canon of the Colorado, Arizona, in 

 Central Texas, and the mode of occurrence ©f the Potsdam formation and 

 fauna, and the granite of Burnet and Llano counties. 



United States Geological Survey. J. W. Powell, director. On the Cam- 

 brian faunas of North America. Preliminary studies, by Charles 

 Doolittle Walcott. Washington: Government Printing Office. 

 1884. 8vo. pp. 1-74. Plates i-x. 



This is a review of the fauna of the St. John formation contained in the 

 Hartt collection at Cornell University, also of the fauna of the Braintree 

 argillities, and a description of a new genus and species of Phyllopoda, from 

 the Middle Cambrian of Vermont. A duplicate series of the St. John species 

 will be given to the National Museum. 



United States Geological Survey. J. W. Powell, director. Paleontology 

 of the Eureka district. By Charles Doolittle Walcott. Washing- 

 ton: Government Printing Office, 1884. 4to. pp. i-xiii, 1-298, 

 Plates i-xxiv. 



This work forms volume viii of the series of monographs published by the 

 U. S. Geological Survey. 



Deer Creek coal held, White Mountain Indian reservation, Arizona. 



(Report and Appendix U. S. Senate Ex. Doc, No. 20,48th Congress, 2d ses- 

 sion, pp. 2-7, Nov. 28, 1884.) 



LESTER FRANK WARD. 

 On Mesozoic Dicotyledons. 



(Amer. Journ. Sci., 3d series, vol. xxvii, April, 1884, pp. 292-303 ; Annals and 

 Magazine of Nat. Hist. (London), 5th series, vol. xiii, May, 1884, pp. 3-\3-396.) 



An historical review, with numerous bibliographical citations, of the dis- 

 covery of dicotyledonous plants in the Cretaceous formation, and an attempt 

 to correlate the various horizons and localities where found ; also an enumer- 

 ation of the species from each horizon. Concluding reflections upon tlin 

 probable Jurassic origin of the subclass Dicotyledons. 



