348 
ACTUSOPTERYGII. 
-with a very slender incurved apex. Splenial teeth for the most 
part strongly incurved, and the largest not more than half the size 
of the principal teeth on the dentary. 
Form, of Loc. Kimmeridgian : Oxfordshire. 
46318. Type specimen comprising the right maxilla with the 
imperfect right mandibular ramns and other fragments ; 
Kimmeridge Clay, Culham, Oxfordshire. The small inner 
row of curved mandibular teeth described bv Owen is 
evidently borne by the splenial bone, which enters and 
strengthens the mandibular symphysis. Cunnington Coll. 
46337. Abraded fragment of the anterior end of the right maxilla, 
doubtfully ascribed to this species ; Kimmeridge Clay, 
Devizes. Cunnington Coll. 
Caturus (Strobilodus) purbeckensis (A. S. Woodward). 
1890. Strobilodus j purbeckensis , A. S. Woodward, Proc. Zool. Soc. 
p. 350, pi. xxix. fig. 4. 
Type. Head; British Museum. 
Head with opercular apparatus ordinarily measuring about 0*1 in 
length ; external bones without ornament. Maxilla comparatively 
slender, the oral border slightly convex in its anterior two-thirds, 
then a little concave, finally turned downwards behind where the 
teeth are remarkably slender and closely arranged; teeth of middle 
of maxilla about twice as deep as the bone at their insertion, with 
much produced slender apical portion. Mandible very slender, 
pointed but not curved downwards in front; height of middle 
dentary teeth about equal to depth of bone at their insertion. All 
the teeth indented at the base on the outer face. 
Form. 4* Loc. Purbeckian: Dorsetshire. 
46911. Type specimen described and figured, loc. cit.; Swanage. 
Purchased , 1875. 
P. 4273. Imperfect right dentary with well-preserved teeth; 
Swanage. ' Enniskillen Coll. 
The following specimens may also be referred to Caturus but 
are not specifically determined : — 
P. 3578. Fragmentary remains of a large fish ; Lower Lias, Lyme 
Regis. Enniskillen Coll. 
P. 530. Imperfect skeleton nearly a metre in length ; Upper Lias, 
34^3. Egerton Coll. 
Boll, Wurtemberg. 
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