452 
SELACnit. 
of Baltringcn, arc described by C. Tlasse, Natiirl. Syst. Elasraobr., 
Besond. Theil (1882), p. 258, pi. xxxvi. fig. 8. Nearly similar 
vertebr® from the Crag of Antwerp arc also assigned to Ilemigaleus, 
op. cii. p. 258, pi. xxxvi. figs. 0-11. 
Genus GALEUS, Ctivi<!r. 
[Ilf'gne Animal, vol. ii. 1817, p. 127.] 
Snout short ; mouth cresoent-sbaped. Spiracles minute. No 
pit at the commencement of the caudal fin ; the latter with a single 
notch. Teeth equal in both jaws, with posterior notch and ser- 
rations. 
As already remarked (p. 438), it is difficult to distinguish the teeth 
of this genus from those of the upper jaw of Bi/poprion. The 
following specimens, however, may probably be placed here : — 
43134 a. Three teeth ; London Clay, Ilighgato, near London. 
Weiherdl Coll. 
40242 a, 40245 . Five small teeth ; Barton Clay, High Cliff, ITump- 
shiro. Edwards Coll. 
The following extinct species are supposed to be indicated by 
various detached teeth, but there are no examples in the Collec- 
tion : — 
Galeus affmis, J. Probst, Wiirtt. Jahresh. vol. xxxiv. (1878), 
p. 130, pi. i. figs. 64—70. — Molassc; Baltringen, Wiir- 
temberg. 
Galeus mstntus, J. Probst, tom. cit. p. 140, pi. i. fig. 71. — 
klolasse ; Baltringen, (? Gingli/mosfoma.) 
Galeus mallzani, T. C. Winkler, Archiv Vereins Fr. Naturgcsch. 
Mecklenburg, vol. xxix. (1875), p. 116, pi. ii. figs. 6-9. — 
Miocene ; Sternberg. 
Galeus pantanellii-. Galeocerdo pantancllii, 11. I,awley, Nuovi 
Studi Pesci, etc. Colline Toscano (1876), p. 15; Studi 
Comp. Pesci foss. coi viv. generi Carcharodon, O.ryrhina, 
e Galeocerdo (1881), p. 140, pi. \. {Galeocerdo) fig. 5, pi. ii- 
fig. 4 : Galeocerdo minor, R. Lawley {non Agassiz), op. 
cit. 1881, p. 147, pi. i {Galeocerdo) fig. 4. — Pliocene ; 
Tuscany. 
Galeus tenuis, J. Probst, tom. cit. p. 140, pi. i. figs. 68-70. — 
Molasse ; Baltringen. 
Vertebra) from the Upper Cretaceous of Maastricht, Holland, 
and from tho Crag of Antwerp, Belgium, are also assigned to 
