280 RECORD OF SCIENCE FOR 1886. 



Walcott, Charles Doolittle — Coutiuued. 



The following uew species are described : Ai'chceocyathus BiUingsi, geuus Lep- 

 tomitus, u. geu., L. Zitteli, Climacograpim ?? Emmonsi, Eocystites^? longidac- 

 tylua, Orthisi HighlaHdensis, Orihlsina ? transversa, O. ? sp. undet., Scenellai. 

 varians, Hyolithes BiUingsi, Hyolithes sp. undet., Leperditial Argenta, Mi- 

 crodiscus Parkeri. Discussion of the relations of the genus Olenellas to other 

 genera. Relations of the genera P(7ra(!oxi(Zes, ilfeso>mris, and Olenellus. Ole- 

 noides typicalis, 0. levis, Ptyclioparia housensis, P. Piochensis, Ptychoparia sp. ? 

 Crepicephalits Liliana, C. Augusta, genus Oryctocephalus, n. gen., 0. 2)rimits, 

 geniiB Proty2>us, n. gen., Bathyuriscus HowelU. 



Walcott, Charles Doolittle. — (/See Davis, W. M.; Kayser; White, 



Charles A.) 

 Walther, J. The Formation of Structureless Chalk by Seaweeds. 

 (Science, vol. vii, No. 177, pp. 575, 57G, June, 1886. New York.) 



A description of the formation of chalk from Lithothamnia^ \u shallow waters 

 in the Mediterranean, which gives a solution of various formations in geol- 

 ogy, especially of the more recent chalk beds. Whether it will apply to 

 the extensive structureless chalk beds of western Kansas at all is doubtful. 



Ward, Lester F. On the determination of fossil Dicotyledonous 

 leaves. (Nature, vol. xxxiv, pp. 158, 1886. London and New York.) 



Notice of. See American Journal of Science, May. 



Ward, Lester F. Note on a few imi)erfect leaf impressions from 

 northern California. (Bull. IT. S. Geol. Survey, No. 33, p. 16, 1886. 

 Washington.) 



The forms come from near Pence's Ranch, and Professor Ward remarks: " If it 

 were certain that the specimen is either Cinnamomum or Paliurus, I should 

 say tliat it could scarcely have come from a higher horizon than the Mio- 

 cene and more likely from a lower. But the specimen may j)ossibly repre- 

 sent a Pojjm/k-s unlike any modern form. At any rate I would not have 

 been surprised at just snch a collection from the Eocene or Laramie group." 



Ward, Lester F. Sketch of PaliBobotany. Fifth Ann. Rep. U. S. 



Geol. Survey. (Science, vol. vii, No. 163, March, 1886. New York.) 

 Notice of. 

 Ward, Lester F. Palteobotany. Fifth Ann. Report of the U. S. 



Geological Survey, 1883 to 1884. (Amer. Jour. Sci., 3d ser., vol. 



XXXI, pp. 402, 403, May, 1886. New Haven.) 



Brief abstract of contents of. 



Ward, Lester F. On the Determination of Fossil Dicotyledonous 

 Leaves. (Amer. Jour. Sci., 3d ser., vol. xxxi, pp. 370-375, May, 1886. 

 New Haven.) 



A discussion of the new bystem of nomenclature in palteobotany recommended 

 by Dr. A. G. Nathorst in the " Botanisches.Centralblatt, Band xxvi, 1886. 



Ward, Lester F. {See Margerie, Emm. de.) 



Weiss (Ernst). J. W. Dawson: The fossil plants of the Erian (De- 

 vonian) and Upper Silurian formations of Canada. Part ii. Montreal, 

 1882. Geological Survey of Canada, S. 95-142, mit4 tafeln. Hierzu 

 sich gesellend einige Kleinere Abhandlungeu desselben Verfassers: 

 Notes on New Erian (Devonian) plants, 1881. Dies. Jahrb. 1882. i, 129. 



