CESIEACIONIID^. 
303 
41400. Larger distal portion of a dorsal fin-spine, showing the 
posterior denticles less clearly divided into two series 
above than below ; Lower Kimmeridge Cla}% near Wey- 
mouth, Dorsetshire. Purchased, 18G0. 
P. 155. Imperfect spine, figured in Damon’s ‘ Geol. of Weymouth,’ 
Append, pi. X. fig. 4 ; near Weymouth. The bases of 
the lower posterior denticles are seen distinctly separated 
into two series ; and the form of the transverse section 
of the upper part of the fragment is altered by the 
breaking away of the anterior margin. Purc/uised, 1881. 
41177, 41222, 41399. Fragments of larger spines, with more 
numerous lateral longitudinal ridges ; near Weymouth. 
One specimen shows three irregular series of posterior 
denticles. Purchased, 1808-69. 
46335. Portions of a spine closely resembling the type specimen of 
Utjhodus acutus in size and characters ; Kimmeridge Clay, 
Foxhangers, near Devizes, Wiltshire. (Juunington CoU. 
(b) Cejihalie Hinne. 
41876. Exserted portion of spine; near Weymouth. 
Purchased, 1869. 
VI. PujiBECK. — The following s{)Ocimens were aU obtained from the 
neighbourhood of Swanage, Dorsetshire. 
(a) Dorsal Fin-spines. 
33476. Tw'o spines indistinguishable from H. dorsalis, Aga.ss., of 
the StonesBeld Slate. Purchased, 1868. 
35569. A less perfect similar spine. Purchased, 1859. 
44847 a. Fragment of a more curved spine, nearly similar. 
Presented by Benjamin Bright, Esg., 1873. 
21346, 24725. A larger more robust spine, and a portion of another. 
Purchased, 1847, 1849. 
46908. Similar spine, nearly complete, but wanting posterior den- 
ficles- PureJutsed, 1875. 
21347-8. Two imperfect crushed spiucs of the form named Ilyhodus 
strictus, Agassiz '. Purchased, 1847. 
21974. Two imixirfect similar spines. Purchased, 1848. 
' Poiss. Foss. Tol. iii. (1837), p. 45, pi. x. figs. 7-9. 
