ART. 16, TWO SQUALODONTS FROM MARYLAND—KELLOGG. 33 
not belong in the Physeteridae, as is shown by the base of the crown 
and the rapid narrowing of the roots. 
TRIRHIZODON SUESSII Brandt. 
? Squalodon suessii Branvt, J. F., Mém. Acad. Imp. Sci. de St.-Petersbourg, 
ser. 7, vol. 20, No. 1, p. 330, pl. 32, figs. 24a, b, c, 1873. 
Squalodon catulli Ziano, A. de, Mém. del Istituto Veneto di Sci., Lett. et Arti, 
Venezia, vol. 20 [extract separately paged, 1-17], pl. —, figs. 1-5, 1876. 
Type specvmen.—Name proposed for a single serrate cheek tooth 
which is characterized by striae and by three anterior and two pos- 
terior secondary cusps. Type in the ‘“K. K. Hofmineralienkabinet”’ 
[= Naturhistorischen Staatsmuseum] at Vienna, Austria. 
Type locality—Not known with certainty for the type specimen 
was labeled ‘‘S. Miniato, Toscana? ,’’ Italy. 4% Lower Miocene. 
Subsequent allocation.—In 1868 Suess * described this tooth and 
considered that it represented an undescribed species. At the time 
Brandt published his studies on the fossil cetaceans of Europe, squa- 
lodonts were very imperfectly known, and it was advisable to place 
on record every specimen collected. By giving this particular tooth 
a name, Brandt succeeded in preventing the record of the occurrence 
of a fossil squalodont in Tuscany from passing into obscurity. The 
presence of well defined and freely projecting cusps on both anterior 
and posterior cutting edges places this tooth among the most pos- 
terior of the molariform series. A second specimen found near 
Belluno, Italy, and consisting of a portion of the rostrum with 14 
teeth in place was referred to Squalodon catulli by De Zigno. This 
specimen was considered to be very similar if not identical with Squa- 
lodon bariensis by Dal Piaz.® It is not clear why Dal Piaz arrived 
at this conclusion, unless one is to believe the figures given by De 
Zigno are inexact. ‘The illustrations accompanying Dal Piaz’s article 
‘eave much to be desired, and the reproduction of De Zigno’s speci- 
men is not nearly as clear as the original plate. A close study of the 
figures accompanying the accounts of De Zigno, Suess, and Dal Piaz 
indicate that these two specimens unquestionably belong to the same 
species. There may be some doubt whether the sixth tooth in the up- 
per jaw has three roots as stated by De Zigno for his figures show only 
two-rooted molars." The rostral fragment does not possess a com- 
plete molar series, and some of the posterior molars may possibly have 
had three roots. <A characteristic feature of the molars of both of 
these specimens is the peculiar saw-toothed appearance of the anterior 
cutting edges. 
49Suess, E., Jahrb. d. geol. Reichsanstalt, Wien, vol. 18, p, 290, pl. 10, figs. 4a-4c, 1868, 
60 Dal Piaz, G., Palaeontographia Italica, Pisa, vol. 6, p. 310, pl. 28, fig, 1, 1901. 
51De Zigno, A, de, Mém. del, Istituto Veneto di Sci., Lett. et Arti, Venezia, vol 20, pl. —, figs. 1-3, 
1876. 
