ASPIDORHYNCHIDiE. 
435 
A slender species attaining a length of at least 0*3. Head with 
opercular apparatus contained about three-and-a-half times, and 
maximum depth of trunk fifteen times in the total length; jaws 
nearly equal in length. Anterior scales of lateral line about twice 
as deep as broad. 
Form. <Sf Loc. Cretaceous : Island of Lesina, Dalmatia; (?) also 
Comen, Istria. 
Hot represented in the Collection. 
Belonostomus comptoni (Agassiz). 
1841. Aspidorhynchus comptoni, L. Agassiz, Edinb. New Phil. Journ. 
vol. xxx. p. 83. 
1844. Aspidorhynchus comptoni, L. Agassiz, Comptes Rendus, vol. xviii. 
p. 1009. 
1890. Belonostomus comptoni, A. S. Woodward, Proc. Zool. Soc. p. 629, 
pis. liv., lv. figs. 1-10. 
Type. Distorted fish, imperfect anteriorly and posteriorly; 
British Museum. 
A large species attaining a length of about 0*8. Head with 
opercular apparatus occupying somewhat less than one-third of 
the total length; maximum depth of trunk contained about ten 
times in the total length. Snout rapidly tapering to a very slender 
rostrum; external ornament of head and* opercular apparatus 
consisting of thick, closely-arranged, rounded rugae of ganoine; 
[jaws unknown]. Vertebrae well-ossified, smooth and constricted, 
about as long as deep, and pierced by a small thread of persistent 
notochord. Scales ornamented with a conspicuous, fine rugosity, 
and a vertical ridge on each of the scales in the two deepened series 
of the flank; the scales of the lateral line truncated interiorly and 
much exceeding in depth the series below, those on the anterior 
portion of the abdominal region being at least five times as deep 
as broad. 
Form. Sf Loc. Upper Cretaceous : Province of Ceara, Brazil. 
47892. Hinder portion of head and greater portion of trunk 
described and figured in Proc. Zool. Soc. 1890, p. 629, 
pi. liv.; Barra do Jardim, Serra de Araripe, North Brazil. 
This may be regarded as the type specimen, the few 
fragments noticed by Agassiz being too imperfectly 
described and now lost. 
Presented by the Hon. Robert Mar sham, 1877. 
15495 e, a. Two specimens showing the upper aspect of the 
cranium and remains of the anterior portion of the trunk ; 
2 f 2 
