264 The American Geoloytst. October, 1896- 
are seen on a. dressed or weathered surface of the rock andl 
are usually very rich in phosphate, often to the extent of 50 
per cent, and more. 
These masses of phosphate, like other residua, such a& 
chert, etc., show the great effects of the long continued leach- 
ing of the rocks, by atmospheric and aqueaus agencies, in. 
this southern non-glaciated region. 
REVIEW OF RECENT GEOLOGICAL 
LITERATURE. 
Ein neuentdecktes Vorkonimen von Tremadoc Fossilieu bet Hof\. 
By Dr. J. F. Pompeckj in Miinclien. In this paper Dr. Pompeckj gives 
an account of a newly discovered occurrence of fossils of Tromadoc age 
near Hof . The fauna of Hof was deseril>ed many years ago by Bar- 
rande, and many of its trilobites referred by him to the genus Cono- 
cephalites. Since his descriptions were written several genera have 
been taken from this extensive genus, and Dr. Pompeckj's article is 
useful as showing how he refers the forms (or at least a number of 
them) which were placed in Conocephalites by the distinguished French 
paleontologist. Conocephalites (?) mimsteri, C. quaesitus and Calymiie 
tristeni var. bavarica are all included in Bavarilla hofensis, and Con- 
ocephalites bavarieus is removed to Dicelocephalus (?) Conocephalites 
innotatus and C. diHcrepans are transfei-red to Niobe. 
In the cystidians and brachiopods we also note changes of genera. 
Cystidea bavarica becomes Macrocystella bavarica. and Lingula incohans. 
is called Acrothele incohans. The other Lingulas and Discinas remain 
generically as Barrande placed them. 
In giving criteria for distinguishing Cambrian from Silurian faunas he 
refers Oonocephalite.s and Olenus (as used by Barrande) Euloma, Bavar- 
illa and Lichapyge to the former: Asaphus, Calymne, Lichas, Niobe,. 
Amphion and Chirurus to the latter. 
Dr. Pompeckj criticises a number of genera and sub-genera, proposed 
by Munier-Chalmas and Bergeron and compares them to Scandinavian, 
and German forms. 
The article closes with a description of the geological section at 
Neuhof, near Hof, where these fossils were found, prepared by Aug. 
Moroff . G. F. M. 
Tiber die Brachiopodengattung Obolus, Eichwald. By August 
MiCHvyiTZ. This is an excellent and very comprehensive memoir on an 
important Cambrian (and Silurian) genus hitherto not fully understood. 
The work opens with a citation of avithors v^^ho have written on the 
genus; a description is then given of the Cambrian terrain around the 
Baltic sea, and of the method followed in prejjaring the fossils. 
