EI.0PIDJ5. 
43 
pressed or much expanded at the base, but smooth or with slight 
longitudinal ribbings, and the slender apex considerably incurved. 
Premaxilla with 13 marginal alveoli ; maxilla with about 46, dentary 
with about 39 alveoli. 
Form. <f- Loc. Upper Cretaceous (Niobrara Group) : Kansas, U.S.A. 
P- 9200. Imperfect crushed cranium, about as broad as long, with 
remains of maxillae and two vertebral centra ; Elkader, 
Logan Co., Kansas. Purchased, 1900. 
Pachyrhizodus subulidens (Owen). 
[Plate VII. figs. 1, 2.] 
1842. Raphiosaurus subulidens, R. Owen, Rep. Brit. Assoc. 1841, p. 190. 
1850. Raphiosaurus lucius, It. Owen, in Dixon’s Geol. Sussex, p. 385, 
pl. xxxix. tigs. 1-3. 
1851. Raphiosaurus subulidens, R. Owen, Rept. Cret. Form. (Mon. 
Palieont. Soc.), p. 19, pl. x. figs. 5, 6. 
1889. Pachyrhizodus subulidens, A. S. Woodward, Ann. Mag. Nat. 
Hist. [6] vol. iv. p. 351. 
type. Anterior portion of left maxilla ; Woodwardian Museum, 
Cambridge. 
Ihe type species of the so-called lacertilian genus Raphiosaurus, 
°1 comparatively small size, the maxilla attaining a length of about 
1 10, and the mandible about O' 15. Teeth very smooth, inwardly 
and backwardly curved. [Premaxilla unknown ;] maxilla flattened 
externally, with a. very large anterior process, and spaces for from 
to 40 teeth. Dentary bone very deep, hut rapidly contracting 
ln l rou t into a narrow thickened symphysis ; its outer face remark- 
ably smooth, marked with two deep longitudinal depressions between 
which the middle part of the bone projects in a rounded longitudinal 
r >dge ; its oral border with spaces for at least 30 teeth. 
Form. <)• Loc. Turonian : Cambridgeshire, Kent, and Sussex. 
38566. Imperfoct right maxilla and left dentary, associated with 
the metapterygoid and part of the hyomandibular ; Lower 
Chalk, Hailing, Kent. Purchased, 1864. 
^308. Slab of chalk with right maxilla exposed from within 
(Pl. VII. fig. 1), associated with clavicle, other fragments 
and scales ; Sussex. The scales are ornamented iu their 
exposed sector with a few discontinuous radiating grooves ; 
and one is figured by the present writer in Proc. Geol.' 
Assoc, vol. x. pl. i. fig. 8. Egertm CoU ' 
