278 The American Naturatst. [March, 
H. S. Williams, the Pennine Range of North England affords a typical 
section upon which the Carboniferous system was founded ; and as t 
term Carboniferous is a misnomer geologically, since coal-bearing 
rocks are not confined to the system generally so-called, and as the 
name does not indicate the geographic position of the typical section, 
he believes that the adoption of the name Pennian System may be of 
advantage (Bull. Geol. Mag., Vol. IL, p. 16). 
Mesozoic.—The dentition and dorsal fin-spines of a shark (A/ybodus 
delabechei), from the Lower Lias of Lyme Regis, Dorsetshire, have been 
described by A. Smith Woodward. ‘This specimen is of special interest 
since it gives the first information as to the number and proportions of 
the dental series in the jaw of the typical members of the genus to 
which it belongs (Yorkshire Philos. Soc., 1888). Some Triassic 
plants from New Mexico have been described by Wm. H. Fontaine and 
F. H. Knowlton. They include Zguisetum abiquiense, E. knowltontt, 
Zamites powellii (?), Z. occidentalis (?), Chetrolepis munsterit, Palissya 
braunii (?), P. cone (2), Cycadites (?), and Ctenophyllum (?). They were 
found in the shale of a copper mine, and many of the specimens were 
not well enough preserved to permit of a positive identification. In the 
sandstone above the shale was found Araucarioxylon arizonicum 
Knowlton (Proc. U. S. Nat. Mus., Vol. XIII., pp. 281-285, Pl. XXII- 
Xxvi.)——A. Smith Woodward has described a new Pycnodont fish 
from the English Portlandian bed, and named it Mesodon damonit, in 
memory of one of the most successful explorers of that formation (Geol 
Mag., Decade HL, Vol. VIL, No. 310, p. 158, April, 1890).—— 
A. Smith Woodward announces the discovery of a Jurassic fish fauna in 
the Hawksbury beds of New South Wales (Ann. and Mag. Nat. Hist., 
Nov., 1890). In a recent paper A. Smith Woodward summarizes the 
skeletal anatomy of the genera Centrolepis and Oxygnathus, and refers 
two new fishes from the Lower Lias to Cocolepis and Undina respec- 
tively, under the names C. Hassicus and M. barroviensis (Ann. and Mag. 
Wat. Hist., Jane, 1890).——A. Smith Woodward has recently elucidated 
some new points in the skeletal anatomy of the genus Eurycormus. 
This genus has been placed in the same great group as the existing 
Amia, and the new gree ss facts tend to confirm the nea 
11; Ichthyodorulite, 1 ; Dipnoi, 1; Ganoidei, 18 (Proc. Geol. Ass), 
Vol. KL, No. 6). 
