244 Genus Ictidopsis 
The septomaxilla forms only a small part of the face. It lies 
between the nostril and the external foramen. Behind this it lies 
within the maxilla, its upper edge only appearing on the face. 
Anteriorly it lies on the floor of the nostril just overlapping on to the 
premaxilla. 
The nasals are very broad between the points where they meet the 
lachrymals and maxille. Anterior to this they narrow rapidly and 
then broaden to the nostril ; while they also narrow between the 
prefrontals. 
The jugal sends forward a process to lie between the maxilla and 
lachrymal. The latter is larger than the prefrontal. | The frontal is 
small and excluded from the orbital margin and articulates with the 
parietal along the intertemporal bar some distance in advance of the 
pineal foramen. 
TExtT-Fic. 1. 
Icripopsis FORMOSA, v. Hoep. 
Skull and lower jaw, from above. (Slightly larger than natural saze ). 
The posterior part of the palate and the side wall of the brain-case 
have been cleared, and are here described for the first time. 
The occipital condyle is double. The ventral surface of the basi- 
occipital is short and broad, forming the inner border at least of the 
foramen jugulare, which is large and looks wholly downwards. The 
ventral surface of the basioccipital is pitted with two or three small 
pits. 
The posterior portion of the basisphenoid forms an equilateral 
triangular area whose base is the articulation with the basioccipital 
and whose sides are slightly ridged only near the apex. As in 
Diademodon and other forms the bony fenestra ovalis is bounded by the 
basisphenoid, basioccipital, and prootic. Anterior to the apex of the 
