168 
The American Geologisi. 
March, 189a 
The forms recognized by Mr. A. S. 
Woodward in his recent catalogue are 
as follows: 
('(>ccoi<t('un th'fij)i('iin Ag., 1844. 
Lower Old Ked Sandstone. 
Coccostens niliwr H. INIiller, 1858. 
Lower ( )ld Red Sandstone. 
Coccostens Iierci/nins H. v. Meyer, 1852. 
Lower Devonian. 
('occostcns (lisjecttis A. S. Woodward, 1891. 
Upper Old Red Sandstone. 
Coccostens obtiisns H. Trautschold, 1889. 
Devonian. 
Coccostens occidoitah's Newberry, 1875. 
Lower Devonian (Corniferous). 
Besides these there are several insuffi- 
ciently described or uncertain fragments 
referred hither by different authors. 
Yet another species was described in 
1880 by Whiteaves as Coccostcus acadicvs 
from the Lower Devonian of Campbell- 
ton, New Brunswick. 
There are therefore at least five species 
known from Europe and two from North 
America. 
The fishes of this genus are not large, 
the original ( '. decipiens measuring only 
about sixteen inches in length and its 
jaw, as figured by ^Miller, in "The Old 
Red Sandstone" is scarcely two inches 
long. Nor were ?a\y of the rest of larger 
size. The two American species whose 
jaws are unknown can be estimated by 
the dorsal plates which vary but little in 
length from those of C. decipiens. Of 
(J. acadicus numerous specimens haA'e 
Iteen found showing 1)oth dorsal and ventral surfaces and these 
have been fully illustrated b}' Mr. Whiteaves, the paljeontologist 
to the Geological Survey of Canada, in his "Illustrations of the 
Devonian Fishes of Canada." Of (J. occidental is only two plates 
are known — the medio-dorsal and the medio-lateral — and these 
were found by the late Mr. J. H. Klippart, of Columbus, Ohio, 
in the Corniferous limestone of Delaware. O. No reasona])le 
