SEMI0N0TID2E. 
101 
right and left snboperculum, post-temporals, supraclavicles, 
left clavicle, and numerous scales; Oxford Clay, Peter¬ 
borough, The operculum, suboperculum, and imperfect 
right mandibular ramus are shown of two-thirds the 
natural size in figs. 20, 20 a. Leeds Coll. 
P. 6173-a. Two specimens of imperfect right dentary and splenial, 
showing the robust teeth on the latter element, the first 
specimen figured in Damon’s 4 Geol. Weymouth,’ Suppl. 
pi. xi. fig. 12; Kimmeridge Clay, Weymouth. 
Damon Coll. 
P. 6173b. Imperfect left dentary showing bases of teeth; Kimme¬ 
ridge Clay, Weymouth. Damon Coll. 
41964 a-d. Fragment of upper dentition, detached teeth, imperfect 
left dentary with three complete teeth, and a small left 
dentary showing bases of teeth ; Kimmeridge Clay, Wey¬ 
mouth. The left dentary with teeth is shown of two- 
thirds the natural size in fig. 21. Purchased , 1870. 
41964 e. Left operculum, much fractured, 0*115 in depth ; Kimme¬ 
ridge Clay, Weymouth. Purchased , 1870. 
41178. Portion of squamation ; Kimmeridge Clay, Weymouth. 
Purchased , 1868. 
P. 1112. Fragmentary portion of squamation and some detached 
scales ; Kimmeridge Clay, Kimmeridge. Egei'ton Coll. 
P. 6174. Two scales, with fractured hinder margin, one figured by 
Damon, op. cat. pi. xii. fig. 10 ; Kimmeridge Clay, Wey¬ 
mouth. Damon Coll. 
Lepidotus affinis, Fricke. 
1875.. Lepidotus affinis, K. Fricke, Palseontogr. vol. xxii. p. 378, pi. xxi. 
figs. 2-6. 
Type. Fragments of dentition; University Geological Museum, 
Gottingen. 
A species of moderate size, known only by the dentition. Mar¬ 
ginal teeth styliform and slender ; inner teeth short, stout, smooth, 
and rounded. Splenial teeth in three irregular concentric series, 
the innermost excessively large; pterygo-palatine teeth relatively 
large, and in four irregular longitudinal series; vomerine dentition 
increasing in size backwards, the anterior teeth in about three 
