Geology and Mineralogy. 229 



at the mouth of the Judith Kiver, overlying No. 5, where the 

 hones of a Hadrosaurus were obtained. 



J?H ?? W 8pecies of fossiIs collected are described by R. P. 

 !. and figured on two plates. The trilobites above 

 referred to are named by him ('rr^nplKihi* (L»g<in,.Ui'*) M<„,- 

 tanensis and .:,■«" i„n„.< tr; r ,i, ir f.itu*. lie also describes the fol- 

 lowing new species of Jurassic age from the Hridger .Mountains : 

 hr;/i>/""> plono-mnvexa, Gerviilia sparsalirota,\Vy«Un<, (<,,>•- 

 ■ : lso i d< u i i , ue of the 



Musselshell, P. Ludlovi. 



4. 77<e Yellowstone National Park and the Mountain regions 

 of portions of Idaho, Nevada, Colorado and Vtnh. Described 

 by Prof. F. V. Haydex, < ^eolo-istdn-charge of the V. S. Govern- 

 ment Exploring Expeditions to the Yellowstone Valley, and of 

 Ji 1 /" < • s - ,; '- ■■i'-ji.-ul and Geographical Survey of the Territories. 

 \ t-tii-.i ni..-i;ih..Li-r.-ii»liii- reproductions .if W'ater-eolor 

 sketches by Thomas Moran, Artist to the Expedition of 1871. 

 I > in large folio, with text by Prof. Hayden. Boston. 

 1876. (L. Prang & Co.)— This volume of colored" sketches illus- 

 t rating some of the most strikiti-j," points in Rocky Mountain 

 s«vnery, is magnificent in scale and beauriml in execution. Mr. 

 - 1 , 1 ' 1 : ' > w< II known for his fine landscapes; and it is fortunate 

 r . i! -■'■'•' a paint, r has been over the wonderful Yellowstone re- 

 ins pencil. The colors oi be thought 

 nit by those who have not visited the region, and per- 

 e-r two eases the artist has allowed his feelings in that 

 ing atmosphere to influence in some degree his brush, 

 out, in other cases, that for example of the scenery along the (anon 

 of the Yellowstone, as w« understand from one who" has visited 

 1 • w urs even fal short oi tin r. i it\ s | • iking ot 

 the variety and richness ol tints over the i >cks of 'that regh n and 

 i n.g. «. ..1. .ii.-l Ludh.w >avs i in the Report noticed 

 on page 228) : "Throughout this elevated region [the Judith 

 d more especially beyond in the Yellow-ioiie Park, we 

 observe the marked depth and clearness of 

 oring, owing, I presume, to the utter purity of the atmo- 

 -.». The colors of objects comparatively near by seemed to 

 Possess an unsurpassed richness and reality; and even on distant 

 mountains, sewi.t\-h'w ..r eighi . tints were 

 en ,.'i and iheii .let ils b <t, tin » exhibited a won- 

 ■;»:nvrirv and distinctness, undimmed by the haze and 

 vagueness which usually obscure such objects." He thus con- 

 fk tlie ^ e - srr 'l ,t i° ,1< which Dr. Hayden and others have given 

 oi the strange variety and beauty of coloring that characterize 

 lie in the 

 (scapes are the follow- 

 Hot Springs of Gardiner's River, Yellowstone National 

 . ••■ '.rem Bine Spring of the Lower Geyser Basin, 

 Yellowstone National Park; (3) The Castle Geyser, Upper Gey- 

 ser Basin ; (4) Lower Yellowstone Range, seen from the Yellow- 



the colorin 



