526 Reports and Proceedings— 
ridges; and a new species, C. trachylepis, is founded upon detached 
scales from Nyran. 
The concluding section of the Monograph relates to some frag- 
mentary evidence of Dipnoan fishes from the Silurian and Devonian 
formations. A new genus and species, Dipnoites Perneri, is indicated 
by a supposed head-bone from the Upper Silurian (Stage G. 3) of 
the neighbourhood of Prague. A new and more satisfactory figure 
of the type-specimen of Gompholepis Panderi, Barrande, is next 
given; and this, too, is regarded as a dermal bone of the cranial 
roof of a Dipnoan—an interesting bone of Ctenodus being figured for 
comparison. Dr. Fritsch adopts Traquair’s determination of the 
Dipnoan character of Paledaphus, and claims to have arrived at the 
conclusion independently ; he then adds a new figure of Phyllolepis 
concentricus, Agass., considering this fossil as probably the head- 
bone of a closely-allied fish; and Arehgonectes pertusus, H. von 
Meyer, and Holodus Kiprijanovi, Pander, are finally briefly noticed, 
the type-specimen of the former being regarded as the bony portion 
of the palate, wanting the teeth. 
Dr. Fritsch appends a synopsis of the literature of the subject (in 
which we miss a reference to two important papers by W. J. Barkas, 
in the Proc. Roy. Soc. N. 8. Wales, 1876-7) ; and a list of the known 
genera of Paleozoic Dipnoan Fishes is given as follows :— 
Srnur1AN.—Gompholepis, Barrande, Dipnoites, Fritsch. 
Deyonran. ~ Paledaphus, Van Beneden and de Koninck; Phyllolepis, Agassiz ; 
Archeonectes, H. von Meyer; -Holodus, Pander; Conchodus, McCoy; 
Mylostoma, Newberry. 
CARBONIFEROUS AND PEerRmMian.—WMegapleuron, Gaudry ; Campylopleuron, Huxley ; 
Conchopoma, Kner; Phaneropleuron, Huxley; Ctenodus, Agassiz; Ptyonodus, 
Cope; Gnathorhiza, Cope. 
The genus Sérigilina, Cope, is also added, but we would remark 
that that has already proved to be founded upon a tooth of Janassa. 
It is fortunate for Vertebrate Paleontology that the Bohemian 
fossils have fallen into the hands of so painstaking an investigator as 
Dr. Fritsch ; and we eagerly await the appearance of the remaining 
parts of this great work, which will treat of ichthyolites of a still 
more satisfactory character than those now described under Ctenodus. 
Jay SH AWN 
d503 BNO N SIRS) JeCIN—ID) JS .Ol| Ova pas LIN (CAS. 
is 
Tue INTERNATIONAL GEOLOGICAL CoNGRESS. 
Rarely, if ever, has so large a number of distinguished geologists 
been drawn together as were assembled in the University of London 
on the opening of the fourth session of the International Geological 
Congress on the 17th of September. The presidential address by 
Professor Prestwich, delivered in faultless. French, traced in brief 
the history of the Congress and forecast its future work. After the 
delivery of this address in the theatre of the University, the 
members were received by Prof. and Mrs. Prestwich in the Library, 
