734 SCIENTIFIC RECORD FOR 1885. 



II. Flora of the Laramie group : 



(1) States that the flora has a relation, remarkably well defined, with 

 that of Sezanne. Says that the age of the Laramie group of Haydeu is 

 not yet definitely determined. The flora, like the invertebrate fauna, is 

 on the whole of a peculiar character, uniformily distributed over the 

 whole extent of the formation, and free from any types or characters 

 relating it to the Cretaceous flora. As the Laramie group has never 

 been subjected to submersion in the deep sea, the few remains of Diuo 

 saurianS found in it are derived from low marine lagoons penetrating 

 into the land, and cannot impress the formation with the Cretaceous 

 character. 



(2) Table of distribution of the species of the Laramie group. 



(3) Description of species added to the flora of the Laramie group. 

 The following new species are described : Osmunda major, Oreodoxites 

 plicatus, Aralia pungens, Anona robiista, Zizyphus Beclcwithii, Bhamnus 

 deformatus. 



III. The flora of the Green Eiver group : 



(1) Geological distribution of the measures. 



(2) Enumeration and description of the species of fossil plants known 

 from ihe Green River group. The following new species are described: 

 Char a f glomcrata, Fontinalis pristina, Isoetes hrevifolius, Splienopteris 

 GuyottiijAdiantites gracillimns, Pinvs FlorissanU, Widdringtonia lingua.'- 

 folia, Cypcritcs Haydcnii,Potamogeton ? verticillatus,Nojadopsis rvgulosa, 

 Lemna penicillata, Flabellaria Florissanti, Palmocarpon f globosum, 

 Myrica obscura, M. rigida, M. citllicomaifolia, M. fallax, M. Scottii, M. 

 diversifoHa, 31. AlMlina. Betuin Florissanti, B. fruncata, Alnus cordata, 

 Ostrya betuloides, Carpimis attenuafa, C. fratcrna, Quercus Osbortiii, 

 Q. pjirifoUa, Q. castaneopsis, Salix amygdaUvfoUa, S. Libbeyi, Ulmis Hil- 

 licc, U. BroicneUii, Celtis McCosMi, Ficvs temiinervis, F. all-alina, San- 

 talum Americanum, Banlxsites Uncatns, Lomatia hal-eafoUa, L. s/;i»os«, 

 L. ierminalis, L. tripartita, L. acutiloba, L. abbreviata, L. interrupta, 

 Pimelea dcUcatida, Olea prwmissa, Fraxinns Ecerii, F. mespiUfoUa, F. 

 abbreviata, F. f myricwfoUa, F. Vngeri, F. Libbeyi, ApocynopliyUum 

 Scudderi, Porana Speirii, P. tenuis, Myrsine latifolia, Bumclia Floris- 

 santi, Macreightia crassa, Andromeda delicatula, A. rhomboidalis, Aralia 

 dissecta, Hedera marginata, Weimnannia integrifoUa, W. obtusifolia 

 Sterculia rigida, Tilia populifolia, Acer indivisum, Sapindus inflexus, S. 

 lancifolins, Evonymus flexifoUus, Celastrus Laccei, C. fraxinifolius, C. 

 elegans. Ilex pseudostenopliylla, I. microphylla, I. maculata, I. querci 

 folia, I. grandifolia, I. knighticvfolia, Ehamnus olemfolius, Juglans Floris 

 santi, Rhus fraterna, R, coriarioides, R. cassioides, R. Eilliw, R. subrhom 

 boidalis, R. vexans, R. trifolioides, Zanthoxylon spireo'folium, Ailanthus 

 longepetiolata, Amelanchier typica, Crataegus acerifolia, Rosa HilUoi 

 Amygdalus gracilis, Cytisus modestus, G. Florissantiamcs, Gercis parvi 



