54 
ACTINOPTEKYGII. 
1855. Palceoniscus glaphyrus, F. M‘Coy, Brit. Palseoz. Foss. p. 607. 
1877. Acentrophorus (P) glaphyrus , It. H. Traquair, Quart. Joum. GeoL 
Soc. vol. xxxiii. p. 562. 
Type. Imperfect fish; York Museum. 
Form and proportions as in the type species, but scales con¬ 
spicuously serrated. 
Form . Log. Upper Permian (Marl Slate): Durham and North- 
umberland. Ap s &m 
There are no typical examples of this species in the Collection; 
but the undermentioned are probably to be regarded as small (or 
young) specimens, according to Egerton (in King, Permian Foss, 
p. 225, pi. xxii. fig. 4):— 
35732. Imperfect trunk, exhibiting traces of serrations on the 
scales ; Marl Slate, probably from Midderidge, Durham. 
Purchased , 1860. 
P. 52. Fine specimen 0*043 in length, showing all the fins but not 
exhibiting any serrations on the scales preserved; Marl 
Slate, Ferry Hill, Durham. 
Presented by Rev. Canon Greenwell , 1880.. 
P. 355. Two similar but more imperfect fishes; Ferry Hill. 
Purchased , 1881.. 
P. 5140. Elongated smaller specimen 0*035 in length; Marl Slate, 
Cullercoats, Northumberland. 
Presented by William Dinning , Esq ., 1886. 
41317. A more imperfectly preserved small specimen, in counter¬ 
part ; Ferry Hill. Purchased, 1869. 
A larger fish than any of the preceding, too imperfectly preserved 
for certain determination, but very much resembling Acentrophorus , 
is described by J. S. Newberry from the Trias of Chicopee Falls, 
Mass., U.S.A., under the name of Acentrophorus chicopensis (Foss. 
Fishes Trias. N. Jersey and Connecticut, 1888, p. 69, pi. xix. 
figs. 3, 4). The type specimens are preserved in Yale College 
Museum, New Haven, Conn., and there are no examples in the 
Collection. 
To this genus A. Fritsch also ascribes some fragmentary remains 
from the Lower Permian of Bohemia, under the name of Acentro- 
phorus dispersus (Fauna der Gaskohle, &c., Bohmens, vol. iii. 1894, 
p. 81, woodc. no. 279, pis. cxiii., cxiv.). 
