Reviews—Dr. von Giimbel’s Geology of Bavaria. 30 
Chalk of the Island of Rugen;! in the present memoir the Bryozoa 
of the same formation and locality are described in a similar careful 
and complete manner, and the new forms, as well as_ those 
imperfectly known before, are faithfully represented in the accom- 
panying ten plates, drawn from nature by the author’s hand. This 
group of organisms was included with others from Rugen in a 
memoir by von Hagenau* nearly fifty years since, but this 
author freely acknowledged the imperfect character of his work, 
which, however, he did not live to amend and complete. Dr. 
Marsson enumerates in the present memoir no fewer than 229 
species, of which 84 belong to the Cyclostomata and 145 to the 
Cheilostomata. The following new genera are constituted, Crypto- 
glena, Epidictyon, Cavarinella, Rhipidopora, Clinopora, Crisidmonea, 
Stigmatocatros, Phormopora, Phormonotos, Phyllofrancia, Pithocella, 
Solenophragma, Bactrellaria, Coscinopleura, Columnotheca, Tcenio- 
porina, Bathystoma, Systenostoma, Platyglena, Nephropora, Lekytho- 
glena, Homalostega, Balantiostoma, Cryptostoma, Dioptropora, Kele- 
stoma, Lagodiopsis, Prosoporella, Pachydera, and Stichocados. Of 
the species enumerated 117 are peculiar to Rugen, and 96 of these 
are new forms, but it is probable that many of them will be 
subsequently discovered in other localities. It is certain, however, 
that a great many are limited to the Rugen Chalk, and no traces of 
them appear in the same formation of England or France. Four 
species extend down to the Neocomian, one to the Gault, 21 to the 
Cenomanian, and nine to the Turonian. With the Chalk of Maes- 
tricht there are 45 species in common. Only five species reach 
upwards to Tertiary strata, and one of these, Entalophora virgula, 
v. Hag., has survived to the present time, Mr. Waters stating that 
he can discover no differences between the fossil and existing forms. 
G. J. H. 
IIJ.—Geronociz von Bayern. Von Dr. R. Wituetm von GUmeet. 
Erster Tuern: Grunpztce per GeoLociz. LinreRUNGEN 
1-5. Large 8vo. pp. 1087. (Kassel, 1884-7, Theodor Fischer ; 
London, Williams and Norgate.) 
aes the lately-issued fifth part, the first volume of the 
‘Geology of Bavaria’ is completed ; it contains 1078 pages 
of printed matter and very numerous illustrations in the text ; thus 
forming a massive volume. ‘This first volume is entirely devoted to 
the “ Grundziige der Geologie,” and it has no special bearing on the 
‘Geology of Bavaria,’ which is reserved for the second volume. It 
forms a very comprehensive and complete Manual or Handbook to 
Science, and may fairly claim a position equal to that held by our 
English Text Book of Geology by Dr. Geikie, and by Lapparent’s 
Traité de Géologie in France. 
The subject is treated under three heads: (I.) Hylology of the 
Earth; (11.) Formation of the Earth, or Geotektoriek; and (III.) 
Geogeny, or the History of the EHarth’s Development. Under the 
1 id. 12 Jahrg. 1880, pp. 1-50, Taf. i-iii. 
* Monogr. der Riigens’chen Kreide-Verst. 1839. 
DECADE III.—VOL. V.—NO. I. 3 
