STKOPHODUS MAGNUS — ACRODUS KEUPERINUS. 
199 
Sub-class ELASMOBRANCHll. 
Order SELACHII. 
S UB- ORDER A S TER OSP ON D Y LI. 
Family C E S T B A C I 0 N T I D ^ . 
Strophoclus magnus, Agassiz. 
In Kutland. — Teeth of this Shark are recorded by ]\Ir. R. Etheridge, F.R.S.,* 
as extremely abundant in the “ Lincolnshire Limestone.” 
Asteracanthus ornatissimus, Agassiz. 
In Rutland. — Teeth are recorded by Mr. Etheridge,* under their later name 
of Strophodus subreticuLatus, Agassiz,t as extremely abundant in the “ Lincoln- 
shire Limestone.” 
Acrodtis minirrms, Agassiz. 
The Museum contains twenty-three teeth, collected by Mr. Harrison from 
the Rhsetic bone-bed. Spinney Hills, and has now acquired others, found by 
Mr. Quilter at the same place, and mentioned by Mr. A. S. Woodward. J 
Acrodus § keuperinus (Murchison and Strickland). 
Remains of this Triassic Shark have occurred in the Upper Keuper Sand- 
stone, in a cutting near the Dane Hills, and were recorded, under their former 
generic name of Hybodus, by Mr. W. J. Harrison, || who wrote : — “ Here we found 
a portion of a fine Ichthyodorulite, the front spine which supported the large 
dorsal fin, probably of a fish, named Hybodus. It is of a light-brown hue, 4 inches 
long, and the exterior surface beautifully fluted.” This fine specimen is still 
in the Museum, which also contains some teeth mentioned by Mr. Harrison 
as having been found at the same place, and a spine and tooth from the Upper 
Keuper Sandstone, Shoulder of Mutton Hill, near Leicester. 
Acrodus, Agassiz (sp. ind.). 
Recorded by Mr. A. J. Jukes Brown, F.Gr.S., from the Lower Lias (semicostatus 
• Appendix ‘Mem. Geol. Survey,’ 1875, p. 283. 
t These teeth are now proved to belong to the Shark, whose dorsal fin-spine was named 
Asteracanthus ornatissimus, by Agassiz, in 1837, which name has precedence by one year. 
I ‘ Trans. Leicester Lit. and Phil. Soc.,’ April, 1889, p. 19. 
§ Formerly Hybodus, but now referred to the genus Acrodus by A. Smith Woodward, 
‘Ann. and Mag. of Nat. Hist.,’ April, 1889, p. 297. 
II ‘ Geol. of Leicestershire and Rutland,’ p. 33. 
