30 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
approaches distinctly that of Cetotherium of the Balaenidae, and the 
permanent loss of the teeth would probably render it necessary to refer 
it to a Mystacocete.” True * has reviewed the history of this inter- 
esting specimen and suggests that: ‘The large extension of the pari- 
etals on the superior surface of the skull in Agorophius indicates that 
it is a primitive form and it is not unlikely that some such form was 
the ancestor of both S. ehrlichii [= Patriocetus grateloupw] and typical 
Squalodon. That Agorophius itself is in the direct line is improbable 
on account of the form of the teeth.” Abel * erects a new family 
Agorophiidae to include Agorophius and Prosqualodon, and considers 
this family as ancestral to the true squalodonts. 
SQUALODON QUATERNARIUM Forsyth-Major. 
Squalodon quaternarium ForsytH-Maysor, ©. J., Atti della Soc. Toscana di Sci. 
Nat. residente in Pisa (Processi Verbali), vol. 2, p. 227, 1881. 
Type.—Original brief description was based upon a single tooth 
that was found associated with the remains of a number of Quater- 
nary mammals, including “Rhinoceros hemitechus, Elephus antiquus, 
and Ursus spelaeus.”’ 
Type locality.—¥ound in the ‘‘ breccia ossifera di Montetignoso,”’ 
near Livorno, Italy. Quaternary ?. 
Subsequent allocation.—This specimen is mentioned by Portis* and 
he, apparently, believed the tooth presented characters that would 
distinguish it from previously described forms. Forsyth-Major failed 
to give an intelligible description for this tooth and hence the name 
quaternarium has no standing. 
PHOCA ? RUGIDENS Meyer. 
Phoca ? rugidens Meyer, H. von, Neues Jahrbuch fiir Mineralogie, Stuttgart, 
p. 309, 1845. 
Type specimen.—“ Zihne von einem Phoca-artigen Thier, das ich 
Phoca ? rugidens nenne.”’ 
Type locality—Neudorfl on the March River near Pressburg, 
Hungary. Middle Miocene. 
* Subsequent allocation.—In discussing this tooth, Von Meyer *’ states 
that it is smaller and possesses fewer accessory cusps than those of 
Phoca [= Microcetus] ambigua and that the cusps do not extend up 
the sides of the main cone. He concludes that the type tooth 
exhibits a closer relationship with the genus Phoca than with 
Squalodon or Zeuglodon. 
This species was placed provisionally in the genus Pristiphoca by 
Trouessart.** It is possible that this tooth may belong to a pinniped 
3 True, F. W., Remarks on the type of the fossil cetacean Agorophius pygmaeus (Miller), Publ. 1694, 
Smithsonian Institution, p. 7, 1907. 
35 Abel, O., Denkschr. Kais. Akad. Wiss. math-naturw. K1. Wien, vol. 90, p. 220, 1913. 
26 Portis, A., Mémorie della Reale Accad. delle Sci. di Torino, ser. 2, vol. 37, p. 333, 1886. 
37 Meyer, H. von, Neues Jahrbuch fiir Mineralogie, Stuttgart, p. 674. 1847. 
8 Trouessart, E. L., Cat. Mamm. viv. foss., Berlin, fasc. 2, p. 380, 1897. 
