242 
ACTIN0PTEKYG1I. 
and partly depressed, but it seems to have compri 
about 10 rays, the length of the longest app r ox ima 
equal to the depth of the trunk at its insertion, 
anal and caudal fins are also imperfect. 1 he large, 
finely serrated scales (fig. 5 a) are especially well sC< j a _ 
the caudal region. Purchased, 
Ihe following specimens seem to be referable to an undeternuu^ 
species of Sardinioides, and are interesting as showing the sin 
parietal bones meeting in the middle line of the skull : ■ 
P. 3977. Vertically crushed imperfect fish, originally about. 0 - 
length ; English Chalk. The bones of the cranial ' oad 
exhibit a faint rugose ornament, and the short an 
median ethmoid projects forwards in front. The pane ^ 
are very small, but clearly overlie tho supraoccip 1,a ^ 
meet in the middle line. There is a large supraor 
bone on each side. The characteristic jaws an ® C ^' C 
checks are seen, while the opercular bones ex 1 1 , 
the cranial roof. A few ver e 
same rugosity as tne cranial rooi. ■« dor d, 
centra are exposed, and there aro remains of the p ec g 
pelvic, and dorsal fins. The large, feebly ctenon sc „ 
are scattered. FcnnishHen ■ 
Mrs. Smith’s CoV- 
49057. Imperfeot head ; English Chalk. 
The following names have been given to fragments, whic 
be imperfect and distorted specimens of one or other of the 
phalian species described above : — 
Sardinioides macropteryyius, W. von der Marck, 1 abco 
vol. xxxi. (1885), p. 250, pi. xxiii. fig. 3.— UpP er k ; 
taceous ; Sendenhorst, Westphalia. [Distorte 
Academy of Munster.] . /,gg5), 
Sardinioides minvtus , W. von der Marck, loc. cit. vol. xxxi. f 
p. 255, pi. xxiii. fig. 2. — Ibid. [Ditto.] ^ x j. 
Sardinioides tenuicaudus, W. von der Marck, i° c - cl ^‘ 
(1863), p. 48, pi. vii. fig. 8. — Ibid. [Ditto.] 
An examination of tho undermentioned specimen has con ^ 
the present writer that this must also be referred to ® ° an j 
Sardinioides, the typical scales being clearly distinguis ia > ^ 
the vertical banding of the fossil being due to the sta e 
serration of the muscle-plates : — 
