NORTH AMERICAN INVERTEBRATE PALEONTOLOGY. 565 



ClaypolE; E. ay. — On the occurrence of the Genus Balmanites in the 

 Lower Carboniferous Rocks of Ohio. (Geol. Ma^^azine, 3d Decade, 

 July, 1884, vol. i, ISTo. vii, pp. 303, 307, London.) 

 The author describes Balmanites^ Giiyahogw, illustrated by a wood- 

 cut, and he discusses the Trilobitic fauna of the carboniferous. 



DwiGHT, William E.— Recent Exi)lorations in the Wappinger Valley 



Limestone of Dutchess County, New York, No. 4. 

 Descriptions of Calciferous ? Fossils. (Amer. Journ. of Sci. and Arts, 



April, 1884, vol. xxYii, article xxix, pp. 249-259, pi. vii, New Haven, 



1884.) 



The figures are clear. The new species described are as follows: 

 Bathyurus taurifrons, B. ? crotalifrons, Gyrioceras vassarina, G. % dac- 

 tyloidcs, G.micro.^copic7(m, OHJwceras spinsisepfinn, 0. Henrietta, and On- 

 coccras vasiforme. 



FoEESTE, Aug. F.— The Power of Motion in Crinoid Stems (January. 

 1884). (Amer. Naturalist, vol. xviii, No. 1, pp. 57, 58; figure in text, 

 Philadelphia, 1884.) 



The author, from the fact that he found a crinoid stem disposed in a 

 perfect natural coil, argues that it placed itself in that position, was de- 

 stroyed while in that position, and must have had the power of motion 

 to place itself in that jjosition. 



Fontaine, W. M. — Contributions to the Knowledge of the older Meso- 

 zoic Flora of Virginia. Monogi aphs of the United States Geological 

 Survey, vol. vi, pp. 1-144, pis. i-liv. 4to. Washington, 1883. [Ap- 

 l)eared December, 1884.] 



This work is divided into three parts. In the first Professor Fontaine 

 gives a brief description of the geology of the Virginia Mesozoic areas. 

 In the second he describes the flora, among it the two new genera, Mer- 

 tensides n. g. and Bseudodana'opsis n. g., and twenty-seven new species: 

 ScMzoneura virginiensls, Acrostichides rJtojnhlfoUus, A. microphyllus, A. 

 densifolius. Mertensides distans, Asterocarpus mrginiensis, A. platyraclm^ 

 A. penticorpaj Pecopteris rarinervis, GladophlehiH Hid)falcata, G. auricidata, 

 G. ovata, G. microphylla, G. pseudoivliitbiensis, G. rotundiloha, Lonchop- 

 teris virffiniensis, Bseudodanmopsis reticulata^ P. nervosa, Petroplujlliim in- 

 a'qnale, Gtenophyllnm truncatiim, G. grand if oliidn, G. gigantenm, Podo- 

 za mites emmonsi, Sphenozamites rogersianns, Gycadites tenuinervis, Zamio- 

 strohus virginiensis, Baiera multifida. 



A table comparing them with plants from the Triassac, Jurassic, and 

 Rhfetic of other regions is given ; 9 j^er cent, show affinities with Tri- 

 assic forms, 19 per cent, with Jurassic forms, and 28 per cent, with 

 Rh^etic forms. The flora must therefore be considered not older than 

 the Rhcetic. 



In the third part he republishes Emmons's figures of the Mesozoic flora 



