14 UPPER CRETACEOUS TELEOSES 
Ichthyotringa delicata (Hay) 
(Text-fig. 5) 
1903 Rhinellus delicatus Hay : 432. 
Diacnosis. Ichthyotringa of estimated standard length 30 mm. Head shallow 
with a flattened roof. Mandibular articulation lying below the orbit. Pre- 
operculum expanded antero-ventrally but with posterior edge remaining vertical. 
Vertebral column consisting of 43 vertebrae. 
HoLotyPe. Specimen number 4530 in the American Museum of Natural History, 
from the Middle Cenomanian of Hajula in the Lebanon. 
MATERIAL. B.M.N.H. specimen number P.48831. This specimen was obtained 
during the transfer development of further specimens of a different genus. P.48831 is 
a small, fragmentary, flattened specimen entirely dissociated from the matrix. The 
snout region is absent and the body is broken and incomplete but the skull-roof is 
intact up to the anterior end of the orbits. 
ReMARKS. Due to the fragmentary nature of the specimen a complete description 
is not available, but those features which are observable warrant its reception in the 
genus Ichthyotyinga. Apart from the difference in age (P.48831 is from Hakel) one 
feature separates it from Ichthyotringa furcata found in the Sahel Alma deposits, this 
being the forward migration of the mandibular articulation to a point below the orbit. 
Hay (1903 : 432) erected a new species for a rhinellid from Hajula in the Lebanon on 
a small specimen mentioned above. The two specimens clearly belong to the same 
species. 
Description. Neurocranium. The neurocranium, without the rostral region, is 
shown in dorsal view in Text-figure 5. The frontals meet in the mid-line in a sinuous 
suture and form the major part of the skull-roof, which is flat. The frontals attain 
their greatest width at the hind end of the orbit above the sphenotics. Here they 
form the anterior half of the roof of the cranial cavity. Above the orbits the lateral 
expansions of the frontals are distinctly marked off from the medial regions, the 
demarcation between these two areas is the tube through which the anterior part 
of the supraorbital sensory canal ran. At first sight these lateral regions of the 
frontal appear to be elongated supraorbital bones. The frontals are unornamented 
except for the slightly raised ridges associated with the course of the sensory 
canal. The lateral and posterior edges of the frontal do not fuse with the neigh- 
bouring roofing bones, but overlap them. The tube which contained the supra- 
orbital sensory canal is indicated by pores opening on to the surface at various points. 
The main supraorbital sensory canal passed anteriorly above the orbit, forming a 
demarcation between medial and lateral regions of the frontal. Further subsidiary 
branches of the supraorbital sensory canal are present within the frontal; one 
branch extends medially and two posteriorly on to the surface of the frontal. Two 
further posterior branches passed on to the dorsal surface of the pterotic. The supra- 
orbital canal also appears to have connected with the infraorbital sensory canal with- 
in the frontal on the dorsal surface of the sphenotic. The otic branch of the infra- 
