230 
ACTIXOPTERYGII. 
minute teeth; teeth of the outer paired series closely arranged, 
longer than broad, and truncated externally. 
Form. Log. Kimmeridgian : Dorsetshire. 
P. 6170. Type specimen; Lower Kimmeridge Clay, Weymouth. 
Damon Coll. 
P. 6749. Imperfect right splenial dentition probably of this species, 
though possibly an abnormal example of Gyrodus cocco- 
derma, exhibiting the principal teeth of a very irregular 
form, scarcely broader than long, and the inner flanking 
series slightly larger than the outer series; Weymouth. 
Purchased , 1892. 
47965. Larger imperfect specimen of the same form of splenial 
dentition ; Coral Rag, Wheatley. 
Presented by the Hon. Robert Marsham , 1877. 
Mierodon pagoda (Blake). 
1880. Pycnodus pagoda, J. F. Blake, Quart. Journ. Geol. Soc. yoI. xxxvi. 
p. 228, pi. x. fig. 10. 
1889. Mierodon pagoda, A. S. Woodward, Geol. Mag. [3] vol. vi. p. 454. 
Type. Vomerine dentition; 
A species of small or moderate size, known only by the vomerine 
dentition, which is somewhat arched from side to side. Teeth of 
the median or principal series at least twice as broad as long ; those 
of the inner pair about half as large as the latter, with tendency 
to oblique elongation; those of the outer paired series much 
smaller, irregular in shape and size, and not much truncated ex¬ 
ternally. 
Form. Sf Log. Portlandian : Dorsetshire. 
40840a. Vomerine dentition; Portland Stone, near Weymouth. 
Purchased , 1867. 
P. 4678. Smaller specimen; Ridgway Quarry, near Weymouth. 
Presented by C. Westendarp, Esq., 1884. 
P.7187. Another small vomer; near Weymouth. Purchased, 1894. 
Mierodon hiserialis, A. S. Woodward. 
1844. Pycnodus hiserialis , L. Agassiz, Poiss. Foss. vol. ii. pt. ii. p. 199 
(name only). 
1890. Mesodon hiserialis, A. S. Woodward, Proc. Geol. Assoc, vol. xi. 
p. 300, pi. iii. fig. 28. 
Type. Left splenial dentition British Museum. 
