ESPECIALLY MYCTOPHOIDS 119 
larger than the lateral flange and unites dorsally with the lateral edge of the endo- 
pterygoid. Posteriorly it is the medial flange which articulates with the quadrate, 
the lateral flange decreasing in size and merging with the medial one posterior to the 
last tooth. 
The metapterygoid is thin and membranous and missing in parts. Dorsally it lies 
against the lateral face of the hyomandibular and its outer face bears a shallow 
obliquely inclined crest which forms the anterior edge of the bone near the ventral 
limit of the metapterygoid. Antero-ventrally the metapterygoid is attached to the 
ectopterygoid and the endopterygoid, and ventrally to the dorsal edge of the 
quadrate. 
The endopterygoid is a narrow sheet of bone attached to the innermost edge of the 
ectopterygoid and lying in the roof of the mouth. The dorsal surface is concave 
below the orbit, but its convex ventral surface is smooth and untoothed. 
The palatine is a prominent, bulbous structure with its posterior end resting in the 
trough on the dorsal ectopterygoid surface. The palatine bears one enlarged anterior 
tooth set at go° to the axis of the bone. The tooth base merges imperceptibly with 
the palatine bone and the tooth is identical in form to those on the ectopterygoid. 
Posteriorly the palatine is extended dorsally forming a facet for the reception of 
the ventral region of the lateral ethmoid. Dorso-medially the palatine has an 
elongated oval facet which houses the lateral wing formed from the fused lateral 
extensions of the mesethmoid and vomer. 
pta df spo fr pa as.p.pm 
hm pm.f 
pop den 
10mm q art.f art 
pop.s 
Fic. 54. Eurypholis pulchellus (Woodward). Skull of the holotype (B.M.N.H. 
number P.1703) in lateral view. 
