WELLBURN : FISH FAUNA OF THE LOWER COAL MEASURES. 429 
Littleborough. The head and body to a point a short distance 
behind the ventral fin being shown. 
Head. — Maxilla, mandible, and other bones shown. 
Fins. — Pectoral and ventral shown. 
Scales on the body well marked and show the following 
ornamentation : — " {a) A few delicate stria; parallel to the anterior 
and inferior margins, and (h) four or five ridges commencing at 
the posterior denticulation and running forwards on the scale 
for some distance more or less parallel with the superior and 
inferior borders." 
Besides abo\e I have found many detached scales in both 
districts. PI. LXII., fig. 3. 
Genus III.: Acrolepis Agassiz. 
Sm. a. Hopkinsi McCoy. 
A large and fine specimen of this fish was found by the 
laie Mr. James Spencer, of Halifax, in a " Baum Pot" in the 
shale above the Halifax Hard Bed Coal, at EUand, near Halifax. 
The head, parts of the body, and some -traces of the fins are 
shown. The specimen is now in the " Davis Collection " at the 
British Museum. 
There is part of the body of a fish — showing the scale 
ornamentation very well marked — in the "Lister Collection," 
belonging to the Borougli of Brighouse, also from the same shale. 
Besides the above, I have a " tail pedicle " from the Lower 
F(jot Mine, Littleborough, and detached scales from the Halifax 
district sliOAving the characteristic scale ornamentation, viz., 
"prominent oblique ridges, with occasional branching and inter- 
calation on the flank scales " ; on the caudal scales the ridges 
sometimes fuse to form a reticulation at the anterior-inferior and 
posterior-superior angles. PI. LXIL, fig. 6. 
Family II. : Platysomidse. 
Genus : Platysomus Agassiz. 
8p. P. parvulus Agassiz. 
Detached head-bones (maxilla, tkc.) and scales. The scale 
ornamentation being "very hne, parallel vertical strict." PI. LXTL, 
fig. 7. 
