20 
ACTIUOPTERTGII. 
49498. Slab with two imperfect large specimens ; Hakel. One fisk 
exhibits the ornament of the cranial roof, the other that 
of the operculum and scales. Tho total number of ver- 
tebra; can scarcely have exceeded 50, though they are not 
readily counted. Lewis CoU- 
49567. Another large spocimen, showing indications of the arched 
maxilla ; Hakel. Lewis CoU. 
P. 103. Large specimen wanting the greater part of the cranium, 
but displaying ornament of opercular apparatus and scales, 
Hakel. The five broad upper branehiostegals are distinct, 
followed below by more delicate rays. Lewis Co 
47313. More imperfect largo fish displaying the dorsal fin, t*nt 
wanting the greater part of the caudal region ; Hakel. 
Presented by Sir Richard Owen, K.C.B - , 1® ( 
49561. Fish about 0-14 in length ; Hakel. The fins are shown, 
and there are indications of about 50 vertebra;. 
Lewis CoU- 
49500. Similar fish deepened by distortion ; Hakel. Lewis CoU- 
P. 104. Imperfect fish displaying the ornamented parietal, squa 
mosal, and frontal bones in impression ; Hakel. Tb e 
complete specimen is shown of the natural size in Pt. I • 
fig. 4, while part of the impression of the cranial root ' 8 
represented three times enlarged in fig. 4 a. Leivis CoU- 
49568. Another imperfect fish deepened and shortened by distor- 
tion ; Hakel. The scale-ornament is well displayed. 
Leivis CoU- 
Osmeroides cretaceus (W. von der Marck). 
1863. Ithabdolepis cretaceus, W. von der Marck, Palajontogr. vol- **■ 
p. 26, pi. xii. fig. 1. 
1868. Holcolepis cretaceus, W. von der Marck, ibid. vol. xv. p- 278. 
18/3. Holcolepis cretaceus, W. von der Marck, ibid. vol. xxii. P- 0< ’ 
Pi- i- %. 1. 
Type. Imperfect distorted fish ; Academy of Munster. 
The type species of the so-called genus Holcolepis, attaining * 
ength of about 0-4. Length of head with opercular appara 
about equal to the maximum depth of the trunk, which is contain® 
four times in the length from the pectoral arch to the base of t 0 
caudal fin. Vertebrae about 70 in number, 24 being caudal- 
