Geology and Paleontology. 245 
neighborhood of Commern is described by Dr. Max Blackenhorn 
in the 32d volume of Zittel’s Paleontographica. 
Trras AND Jurassic. — The German Paleontographica 
(Stuttgart, 1886) contains a gevlogical and paleontological mono- 
graph of the “ Vilser” Alps, with especial reference to the Brachio- 
poda. The work is illustrated with fifteen plates and a map of the 
region. The strata belong to the Trias and Jura. The general 
facies of the fauna, especially that of the Brachiopoda, is Mediter- 
ba rather than Central European. Several new species are 
escribed. 
The Asterids of the White Jura of Swabia and Franconia, 
with researches into the structure of the Echinodermata and the 
calcareous skeleton of the Asteriadæ, form the subject of the last 
memoir in Volume 32 of Paleontographica. 
new Iguanodon, J. dawsonii, has been described by Mr. R. 
Lydekker from the Wealden strata of the Isle of Wight. 
G. C. Laube and G. Bruder describe the Ammonites of the 
Bohemian chalk in Band. 38 of Paleontographica. Eleven 
Mr. A. S. Woodward (P. Z. 8., 1887) refers the genus 
Rhacolepis, Agassiz, to the neighborhood of the Clupeidæ, and 
places it near Elops. It seems to have been one of the fore- 
runners of the latter to have been developed in Jurassic 
times, and to have swarmed in Cretaceous seas. The fossils are 
“ommon in the Serra de Araripe, in Northern Brazil. 
i Cretacrous.—Herr Car] Diener, in a contribution to the know- 
edge of the Cretaceous formation of Syria (Zeit. d. Deutschen geol., 
ges. 1887) gives a table of subdivisions, placing the Lebanon chalk 
ky in the Turonian and partly in the Cenomanian and the Arâja- 
kstein at the bottom of the series. 
Bea S. Meunier, from experiments made upon the chalk of 
uval with acidulated water, arrives at the conclusion that the 
enin ction of a material which was originally distributed 
TERTIARY.—Mr. A. S. Woodward revises the British Eocene 
