N. A. INVERTEBRATE PALEONTOLOGY. 733 



Kjirsch, Franz. — Samuel H. Scudder: A Contribution to our knowl- 

 edge of palaeozoic Aracbnida. Proceed, of the American Academy of 

 Arts and Sciences, vol. xx (N. S. xii), 1884, pp. 13-22. Neu. Jahrb. 

 fur Min. Geol. & Pal, 1885, Band ii, pp. 172, 173. Stuttgart. 

 (Abstract.) 



KuNZ, G. F. — On tbe Agatized Woods and the Malachite, Azurite, &c., 

 from Arizona. Trans. N. Y. Acad. Sci., vol. v, 1885-'86, pp. 9-12. 

 October, 1885. New Yor^i. 



Describes tbe silicified forest in Arizona known as Chalcedony Park, 

 situated 8 miles south of Corriza, Apache County, Arizona. Remarks 

 that the wood structure has been perfectly preserved even to the forms 

 of the minute cells. 



Lesquereux, Leo.— Contributions to the Fossil Flora of the Western 



Territories, part iii. The Cretaceous and Tertiary Floras. Eep. U. 



S. Geol. Sitrv. Territories, F. V. Hayden, U. S. Geologist in charge. 



vol. VIII, pp. i-vi and 1-283, pis. i-lix. 4to. 1883. Washington. 



This important work was not published till February, 1885, although 

 it bears the imprint 1883. It is divided into four parts, as follows, viz: 



I. The flora of the Dakota group: 



(1) General remarks. Concludes that the first appearance and ap- 

 parent simultaneous multiplication of the dicotyledonous plants remains 

 a fact inconceivable to reason. 



(2) Description and enumeration of species of the American Dakota 

 group formation. The following new species are described : Equisctum 

 nodosum, Podozamites oblongus, P. prceUngus, P. emarginatus, P. cauda- 

 tus, Torreya oblanceolata, Thuites crassus, Myrica Sternbergii, Quercus 

 dakotensis, Q. morrisoniana, Ficus BccTiwitliii, F. f angustata, F. magno- 

 liafolia, F. Glasccena, Lomatia Saportcana, var. longifoUa, Laurus f mo- 

 desta. Sassafras [Araliopsis) dissectum, S. {A) platanoides, Aralia sub- 

 emarginata, A. tenuinerms, A. radiata, Gissites salisburiafoUus, Hama- 

 melltes tenuinervis, H. quercifoUus, H. (?) cordatus, Magnolia sp. Lirio- 

 phyllum obcordatum, Carpites Uriophylli f, Anona cretacea, Menispermites 

 acutilobus, M. grandis, StercuUa lugubris, S. aperta, Sapindus Morrisoni, 

 Rhamnus prunifolius, Leguminosites cultriformis, Aspidiophyllum denta- 

 tum, A. platifolinm, Carpolithes species.? 



(3) Table of distribution of the plants of the Cretaceous Cenomanian 

 formation. 



(4) Relationship of the flora of the Dakota group. The author con- 

 cludes that the marked analogy in the components of the floras author- 

 izes the conclusion of equivalency of the age of the Dakota group with 

 that of the Quader sandstone of Germany, which is as positively de- 

 termined as Cenomanian by its animal fossils as the Dakota group is 

 recognized as Middle Cretaceous by the invertebrate remains which 

 abound in the strata of the Fort Benton group immediately overlying it. 



