8 UPPER CRETACEOUS TELEOSTS 
MATERIAL. B.M.N.H. numbers 48089a, 48089), 48092, 49544, all from the Upper 
Senonian of Sahel Alma, Lebanon, and all prepared by the transfer method in acetic 
acid. Specimen number 8436, being the negative impression of a complete fish in the 
Palaontologisches Institut der Westfalische Wilhelms-Universitat, Minster. This 
latter specimen was that used by von der Marck (1873 : 60, pl. 2, fig. 4), and is from 
the Upper Senonian of Sendenhorst, Westphalia. 
DeEscRiIPTION. Neurocranium. A dorsal view of the reconstructed neurocranium 
is shown in Text-figure 1. The neurocranium is elongate, shallow, relatively narrow, 
and drawn out preorbitally to enter into the composition of the rostral region. The 
mesethmoid extends the whole length of the rostrum and so too does the vomer 
below it. In the base of the orbit the parasphenoid contacts the vomer anteriorly in 
front of the lateral ethmoids. The frontals form most of the skull-roof and are un- 
ornamented, but bear two large lateral ridges which run longitudinally above the 
orbital region and demarcate a median interorbital depression. Lateral to the 
ridges, above the orbit, the frontals are curved, forming the upper margin to the 
orbit. 
The supraoccipital is small and contacts the parietals anteriorly and the epiotics 
laterally. The parietals are large and meet in the mid-line of the skull-roof anterior 
to the supraoccipital. Laterally the parietals curve ventro-laterally and are over- 
lapped by the pterotics, forming, presumably, the roof of the post-temporal fossa. 
5mm 
Fic. 1. Ichthyotringa furcata (Agassiz). Neurocranium in dorsal view. 
