348 
8ELACHII. 
removal of matrix since the publication of the original 
figure and description ; and these exhibit the characters 
noted in the foregoing generic and specific diagnoses. 
Enniskillen Coll- 
Genus GINGLYMOSTOMA, Miillor & Henle. 
[Syst. Boschreib. Plagiostom. 1841, p. 22.] 
Syn. Nebruis, E. IlUppell, None Wirbelth. Abyssinien, Fische, 1836, 
p. 02. 
Plicodus, T. C. Winkler, Archiv. Mus. Teyler, vol. iii. 1874, 
p. 301. 
Awodohatis, J. Eeidy, Journ. Acad. Nat. Sci. Philad. [2] vol. viii. 
1877, p. 250. 
First dorsal fin above or partly behind the pelvics ; origin of 
second dorsal in advance of the anal. Teeth robust, with a broad 
depressed root, flattonod and not divided into two radicles ; anterior 
face of the crown much larger than the posterior, produced down- 
wards and forwards mesially, the trenchant coronal border more or 
less coarsely denticulated. 
Ginglymostoma serra (Loidy). 
1877. Acrodohatis serra, J. Loidy, .iourn. Acad. Nat. Sci. Philad. [2] 
vol. viii. p. 250, pi. xxxiv. figs. 10-13. 
(?) 1877. Acroduhatis ohliquus, J. Loidy, tom. cit. p. 250, pi. xxxiv. fig. 14. 
Type. Detached teeth. 
Median cusp of dental crown narrow, prominent ; lateral serra- 
tions relatively small and numerous (about 7-9). 
Form, if Loc. Eocene : South Carolina, Alabama, and (?) New 
Jersey, U.S.A. 
P. 1216. T wo teeth, one shown of the natural size in PI. XVI. 
fig. 9 ; Clarke’s Co., Alabama. Eyerton Coll. 
The following species have also been founded upon detached teeth, 
but there are no examples in the Collection : — 
Ouiylymostoma minutam, W. Dames, Neues Jahrb. 1888, vol. ii. 
Eeforat. p. 323. Ilyhodus minutus, II. Forir, Ann. Soc. 
Geol. Belg. vol. xiv. (1887), p. 35, pi. ii. figs. 2, 3. — • 
Danian ; Maastricht, Belgium. 
Ginylymostoma ihielense, F. Noetling, Sitzb. Ges. natiirf. Fr. Berlin, 
1886, p. 14, figs. 2, 3. Plicodxis ihielensis, T. C. Winkler, 
Archiv. Mus. Teyler, vol. iii. (1874), p. 301, pi. vii. fig. 5 J 
ibid. vol. iv. (1876), p. 20. — Bruxellian Eocene ; Belgium. 
