14 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
skull with two squamosals, frontal, maxillae, premaxillae, ethmoid, 
and vomer; two molars in situ, and four double-rooted alveolae. 
Van Beneden, in addition to this skull, mentioned one premolar and 
two caniniform teeth. Besides the above material Van Beneden asso- 
ciated the skull of a supposed young individual * with this species. 
Types in the Museum Francisco-Carolinum at Linz, Austria. 
Type locality —Found in a bed of marine sand in the vicinity of 
Linz, in the valley of the Danube River, upper Austria. Upper 
Aquitanian or Upper Oligocene.. 
Subsequent allocation—The skull of the young individual was 
removed from this species by Brandt * and a new species, Squalodon 
incertus [= Agriocetus vncertus = Agriocetus austriacus Abel] erected 
for it. The other skull is the supposed saurian of Klipstein and the 
same one that Von Meyer named Squalodon gratelowpii. Squalodon 
ehrlichwy of Van Beneden thus becomes a synonym of F'atriocetus 
gratelouwpw (Meyer). 
NEOSQUALODON GASTALDII (Brandt.) 
Squalodon gastaldit ? Branpt, J. F., Mém. Acad. Imp. Sci. de St.-Petersbourg, 
ser. 7, vol. 20, No. 1, pp. 326-328, pl. 32, figs. 1-23, 1873. 
Type specimen.—Consists of posterior portions of two mandibles, 
four serrate and two caniniform teeth, a cervical, a dorsal, three 
lumbar, and two caudal vertebrae, and arib. Type in the collection 
of the University of Turin, Italy. 
Type locality The ‘‘molasse”’ of Acquia, Piemonte, Italy. The 
nature of the deposit may have been given erroneously by Brandt, 
for Portis * states that the specimens came from a limestone forma- 
tion near Acquia. Abel* considers that this formation belongs to 
the Middle Miocene. Aquitaniano or Upper Oligocene. 
Subsequent allocation.—A new genus, Micresqualodon, was proposed 
for this species by Abel, but he withdrew the name * on receiving 
additional information from Dal Piaz. Capellini*®” has reported on 
the discovery of additional remains of this interesting squalodont. 
His material includes a tympanic and a periotic. 
TRIRHIZODON GERVAISII (Van Beneden.) 
Squalodon gervaisii VAN BENEDEN, P. J., Mém. Acad. Roy. Sci. Belgique, Bru- 
xelles, vol. 35, p. 71, 1865. 
Type specimen.—Name proposed for a single molar tooth figured 
by Gervais.* [An additional fragmentary molar crown is figured on 
51Van Beneden, P. J., Mém. Acad. Roy. Sci. Belgique, Bruxelles, vol. 35, pl. 2, fig. 4; pl. 3, fig. 1. 
52 Brandt, J.F., Mém. Acad. Imp. Sci. de St.-Petersbourg, ser. 7, vol. 21, No. 6, pp. 39 (footnote), 42, 
1874, 
53 Portis, A., Mémorie della Reale Accad. Sci. di Torino, ser. 2, vol. 37, pp. 329-333, 1886. 
54 Abel, O., Mém. Mus. Roy. Hist. Nat. Belgique, Bruxelles, vol. 3, p. 35, 1905. 
55Tdem., p. 35. 
56Tdem., p. 36. 
‘TCapellini, G., Mém. Accad. Sci. dell’Ist. di Bologna, ser. 4, vol. 2, pp. 1-9, pl. -, figs. 1-7, 1881. 
8 Gervais, P., Zool. et Paléont.frane., Paris, ed.1, vol. 1, p. 152, pl. 8, figs. 11, lla, 1848-1852. 
