LIST OF PUBLICATIONS. 



145 



Hollick, Arthur. Results of a pre- 

 liminary study of the so-called Kenai 

 flora of Alaska. 



Amer. Joum. Sci., 4th se- 

 ries, 31, April, 1911, pp. 

 327-330. 

 This paper briefly describes and 

 discusses the flora and points out 

 the significance of the facts brought 

 out in the author's preliminary 

 study. It is further stated that 

 " the identity of the Tertiary 

 floras of northwestern America and 

 northeastern Asia is confirmatory 

 evidence of a former land connec- 

 tion between the two continents in 

 recent geologic times." 



Kirk, Edwin. The structure and re- 

 lationships of certain eleutherozoic 

 Pelinatozoa. 



Proc. U. S. Nat. Mus. } 41, 

 No. 1846, June 7, 1911, 

 pp. 1-137, pis. 1-11. 

 The paper seeks to prove the 

 widespread maintenance of an 

 eleutherozoic form of life among 

 the Pelmatozoa, animals that are 

 commonly held to be essentially 

 statozoic in habit. Certain struc- 

 tural features are discussed at 

 length, in so far as such treat- 

 ment may throw light on the 

 affinities of the organisms. The 

 modifications incident to the as- 

 sumption and maintenance of a de- 

 tached or semidetached existence, 

 and the effect of such a mode of 

 life on the ecology of the organ- 

 isms, receives considerable atten- 

 tion. 



Knowlton, F. H. The climate of 

 North America in later-glacial and 

 subsequent post-glacial time. 



Postglaziale Klimarerander- 

 ungen, Stockholm, 1910, 

 pp. 367-369. 



The Jurassic age of the "Jur- 

 assic flora of Oregon." 



Amer. Joum. Sci., 4th ser., 

 30, July, 1910, pp. 33-64. 

 There are two fossil floras 

 known in the Mesozoic rocks of 

 California and Oregon, the one 

 Jurassic and the other Cretaceous. 

 While other writers have claimed 

 that the so-called "Jurassic flora 

 of Oregon " is Cretaceous in age, 

 the present paper presents the 

 paleobotanioal evidence which 

 proves that the two floras are al- 

 ways perfectly distinct, there be- 



24292°— 12 10 



Knowlton, F. H. — Continued. 



ing only one species out of 100 

 that is common to the two, and 

 the conclusion is reached that this 

 " Jurassic flora " is undoubtedly 

 of true Jurassic age. The line be- 

 tween the Jurassic and Cretaceous 

 is to be drawn through the upper 

 part of the Knoxville formation, 

 and not at its base. 



Moodie, Roy L. A new labyriuthodout 

 from the Kansas Coal Measures. 



Proc. U. 8. Nat. Mus., 39, 

 No. 1706, Jan. 30, 1911, 

 pp. 489^195, figs. 1-4. 

 Describes and figures the type 

 specimens of the new genus and 

 species Erpetosuchus kunsenste. 

 The types belong to the U. S. Na- 

 tional Museum. 



Two amphibians, one of them 



new, from the Carboniferous of Illi- 

 nois. 



Proc. U. S. Nat. Mus., 40, 



No. 1828, May 8, 1911, 



pp. 429-433, figs. 1, 2. 



Discusses the alimentary canal 



and skeletal structure of Eumi- 



crerpeton parviim, and describes 



the new species Amphibamus thora- 



catus. The specimens are in the 



U. S. National Museum. 



Parks, William Arthur. Ordovician 

 stromatoporoids of America. 



University of Toronto 

 Studies, Geological Se- 

 ries, No. 7, 1910, pp. 

 295-344, pis. 21-25. 

 Describes all the valid species 

 of Ordovician stromatoporoids 

 and reviews the invalid forms. 

 Many of the types or typical ex- 

 amples are in the U. S. National 

 Museum. 



Springer, Frank. The crinoid fauna 

 of the Knobstone formation. 



Proc. U. S. Nat. Mus., 41, 

 No. 1850, June 24, 1911. 

 pp. 175-208. 

 A detailed study of large collec- 

 tions of crinoids from the Knob- 

 stone formation at the classic lo- 

 calities in Kentucky and Tennes- 

 see, notably the knobs south of 

 Louisville, Kentucky, and Whites 

 Creek Springs, Tennessee, showed 

 that, upon phylogenetic grounds 

 alone, these could not all have been 

 derived from the Keokuk group, 

 as hitherto reported in the litera- 

 ture and on collectors' labels. A 



