MTLIOBATIDiB. 
127 
Rhinoptera studeri (Agassiz). 
1843. Zt/ffobaten studeri, L. Agassiz, Poiss. Foss. vol. iii. pp. 329, 333, 
pi. R. figs. 3-6. 
1882. Zygobates studeri, II. E. Sauvage, M6m. Soc. Sci. Nat. Saone-et- 
Loire, vol. iv. p. 67, pi. i. figs. 17, 18. 
Type. Detached teeth ; British Museum. 
A species at present indefinable. 
Form. 4‘ Loc- Dower Miocene (Molasse) : Switzerland, (?) and 
France. 
P. 1523. Two teeth, one apparently median, the other first lateral, 
bearing Agassiz’s MS. label. These must be regarded as 
the type-specimens of the species ; Soleure. Egerton Coll. 
P. 3062. Two teeth ; Soleure. Ennishillen Coll. 
Rhinoptera woodward! (Agassiz). 
1843. Zygobates woodwardi, L. Agassiz, Poiss. Foss. vol. iii. pp. 329, 
333, pi. R. figs. 6, 7. 
1880. Shinoptera tcoodivardi, A. Giinther, Introd. Study of Fishes, 
p. 34C, woodc. fig. 132. 
Type. Detached teeth. 
An indefinable species probably of this genus. The restored 
figure of the dentition given by Dr. Giinther is hypothetical. 
Form. <Sf Loc. Red Crag and Norwich Crag (Pliocene) : Suffolk, 
Norfolk. 
P. 4934. Median (?) dental plate ; Red Crag, Suffolk. 
Presented hy J. E. Lee, Esq., 1885. 
P. 1524. Fragments ; Norwich Crag, Norwich. Egerton Coll. 
Detached teeth of Rhinoptera have also been described from the 
Phosphate Beds of South Carolina, under the name of Zygohatis 
dubius, J. Leidy, Proc. Acad. Philad. 1855, p. 396, and Joum. Acad. 
Philad. [2] vol. viii. (1877), p. 247, pi. xxxi. figs. 21-37. 
Vertebra) supposed to be referable to this genus are also described 
by C. Hasse (Natiirl. Syst. Elasm., Besond. Theil, p. 160), from the 
Upper Cretaceous of Aix and Maastricht, and the Lower Eocene of 
Brussels. 
Genus AETOBATIS, Miiller & Henle. 
[Syst. Beschreib. Plagiostom. 1841 p. 179.] 
Syn. Oonidxitis, Le Hon, Prelim. M4m. Poiss. Tert. Belg. 1871, p. 10 
Head free from the disk ; so-called cephalic fins paired. Teeth 
