PLATYSOMATIDiE. 
537 
1879. Cheirodus granulosus, R, H. Traquair, Trans. Roy. Soc. Edinb. 
vol. xxix. p. 363, pi. y. 
1890. Cheirodus granulosus , J. Ward, Trans. N. Staffs. Inst. Mining 
Engin. vol. x. p. 184, pi. vii. figs. 1-9. ^ 
e-cuc ^ - 
Type. Well-preserved fish; ^oll£dtian^£4 : 9lw3-W4fc£4y--Esq. L^egtr 
tefh- 
A species attaining a maximum length of about 02. Dorsal and 
ventral peaks of trunk acuminate, reflexed, the former very slight! v 
in advance of the latter, and the distance between the two about 
equal to the total length of the head and trunk without the caudal 
fin. Head and opercular apparatus occupying nearly one quarter 
Eig. 57. 
Cheirodus granul-osus (Young).—Restoration by R. H. Traquair. 
of the total length; both ridges of pter} T goid and splenial bones 
coarsely, but irregularly denticulated. Dorsal and anal fins arising 
immediately behind the dorsal and ventral peaks, forming an in¬ 
significant low fringe ; depth of caudal expansion considerably more 
than one-half the maximum depth of the trunk. Scale-ornament, 
as also that of the head and opercular bones and pectoral arch, 
consisting of coarse tuberculations, sometimes partly confluent, 
often arranged in series. 
This is the type species of the so-called Amphicentrum. 
Form. <$f Loc. Coal-Measures : Staffordshire, Lancashire, and 
Lanarkshire. 
