440 
SELACniI. 
Teeth have also been assigned to C'. egertoni from the Lower Ter- 
tiary of Birket^el-Qurun, Egypt (W. Dames, Sitzungsb. k. prcuss. 
Akad. Wiss. 1883, pt. i. p. 142, pi. iii. Hg. 5) ; from the Miocene 
of Naples (0. G. Costa, Paloont. Regno Napoli, pt. ii. (1854- 
50), p. 65, pi. vii. fig. 29); and from the Pliocene of Tuscany (R. 
Lawley, Nuovi Studi Pcsci, etc. Collino Toacane, 1870, p. 14, and 
Studi Comp. Pesci foss. coi viv. generi Carcharoifon, O.vyrhina, e 
Galeocerdo, 1881, p. 130, pi. i. (Galeocerdo), fig. 2, pi. ii. fig. 1, 
pi. iii. fig. 7) ; but the evidence is insufficient to render the deter- 
minations certain. The species is retained in Corax by Dames and 
Costa, but assigned to Galeocerdo by Lawley, the latter having de- 
termined the liollowness of the Italian to(ith. 
Carcharias (Prionodon) aculeatus (Davis). 
1888. Galeocerdo aculeatm, .1. \V. Davis, Trans. Roy. Dublin Soc. [2] 
vol. iv. p. 8, pi. i. figs. 1-3. 
Type. Detached teotli ; Canterbury Museum, Christchurch, Now 
Zealand. 
Lower teeth with a narrow elevated crown suddenly expanding 
at its base over a broad root ; marginal serrations especially largo 
and prominent at the base. 
Form. <^- Loc. Paroora and Oamaru Systems : New Zealand. 
42019. Two teeth, one almost destitute of serrations, and evidently 
referable to the symphysis; Canterbury, New Zealand. 
Presented hy J. Davies Enys, Esq., 1870. 
P. 2308 b. Largo imperfect tooth ; Otatara series, Trolissic, Canter- 
bury. By e.vehanye, 1870. 
The following detached teeth of the subgenus Prionodon are also 
preserved in the Collection : — 
10556. High-crowned, oblique upper tooth, prominently serrated, 
and deeply notched posteriorly ; Cretaceous, Now Jersey, 
U.S.A. 31antdl Coll. 
47020. Three teeth, resembling those named Galeocerdo eyertoni by 
Lawley; Pliocene, Orciano, Tuscany. Purchased, Dil 5. 
47009. Lower tooth, in form suggestive of the subgenus Aprionodon, 
but with finely serrated coronal edges ; Phosphate Reds, 
South Carolina. Purchased, 1870. 
Teeth of the subgenus Ih-ionodon have also been described under 
the following names, but there are no examples in the Collection : — 
Carcharias {Prionodon) acutus, L. Agassiz, Poiss. Eoss. vol. iii. 
