28 
ACTINOPTEETGII. 
1844, Rhacolepis olfersii, L. Agassiz, Comptes Rendus, vol. xviii. 
p. 1012, and Poiss. Foss. vol. iv. p. 293 (name only). 
1887. Rhacolepis hrama, A. S. AYoodward, Proc, Zool. Soc. p. 539, 
pi. xlvi. fig. 1, pi. xlvii. fig. 4. 
Tyjpe. Head ; British Museum. 
The type species, attaining a length of about 0*6. Length of head 
with opercular apparatus exceeding the maximum depth of the 
trunk, and contained about four times in the total length of the 
fish. The two posterior suborbitals much broader than deep, but 
the low^er less deep than the upper plate ; postero-inferior sub¬ 
orbital of a deep triangular form ; operculum almost as broad as 
deep. Pelvic fins arising slightly nearer to the anal than to the 
pectorals, opposite the hinder half of the dorsal fin, which has 
about 10 rays beyond anterior basal rays. 
Form. (^' Loc. Upper Cretaceous : Province of Ceara, IS. Brazil. 
All the following specimens were obtained from Barra do Jardim, V 
Serra de Araripe :— ) 
15490. Type specimen, the head, opercular apparatus, clavicle, and 
some anterior scales, figured in Proc. Zool. Soc. 1887, 
pi. xlvii. fig. 4. It is labelled by Agassiz. 
Purchased from Mr. Gardner. 
P. 1957. More imperfect similar head, wanting the cheek-plates and 
displaying remains of internal bones, labelled “ Rhaco¬ 
lepis Brama., Ag.,” by Agassiz, and the parietals and teeth 
noticed loc. cit. p. 536. Remains of the large gular plate 
are distinct. Egerton Coll. 
P. 1960, P. 3986. Small fish, in counterpart, figured loc. cit. p]. xlvi. 
fig. 1. The large gular plate is conspicuous between the 
mandibular rami. Egerton ^ Ennishillen Colls. 
P. 1960 a, P. 3985. More imperfect small fish, in counterpart, 
deepened and shortened by distortion, but showing the 
separate plate above the operculum, and displaying scale- 
ornament. Egerton ^ EnnisJcillen Colls. 
P. 1962 d, P. 39861). Still smaller fish, wanting caudal fin. 
Egerton ^ Ennishillen Colls. 
P. 1962 h, P. 3986. Vertically crushed imperfect small fish. 
Egerton Ennishillen Coles. ■ 
47886. Head and portion of abdominal region of large specimen, 
