arr. 16, TWO SQUALODONTS FROM MARYLAND—KELLOGG. Ati 
and that these strata belong to the Oamaru system. The inverte- 
brate fauna led Professor Park to advance the opinion that the 
Kekenodon horizon is not older than the Middle Miocene. Accord- 
ing to this investigator, Kekenodon always occurs in the same hori- 
zon, and its vertical range is very limited. Furthermore, the 
Kekenodon bone bed always occurs at the base of the Waitaki or 
Ngapara stone and thus belongs to the Lower Hutchinsonian or 
Upper Ototaran stage. Dr. J. Allan Thomson’ employs the stage 
names Upper Wairekan or Lower Ototaran for the Kekenodon bone 
beds. Oamaru system, Oligocene or Lower Miocene. 
Subsequent allocation.—This genus was referred to the Squalodon- 
tidae by Hall,?? but there is some reason for doubt regarding this 
allocation. The remarkably strong resemblance which these teeth 
bear to those of Dorudon serratus as represented by teeth in the 
collection of Yale University implies a close relationship. The 
unusual appearance of the accessory cusps, the character of the 
enamel surface of the crown, and the large size of the teeth are 
peculiarities which place this form among the zeuglodonts. Such 
features are unknown for any squalodont. 
According to Park,” remains of Kekenodon onamata have been col- 
lected at the following localities: Shelly sands and soft sandstones 
[loose calcareous greensand = Kekenodon beds] exposed on the south 
bank of the Waitaki River, one half a mile below the junction of 
the Wharekuri Stream; glauconitic greensands [Marawhenua green- 
sand] at the base of Waitaki Stone, a mile and a half east of Mara- 
whenua; marly greensands [Upper Waihao greensand] immediately 
underlying the Waitaki Stone at Waihao Forks; as well as from the 
Kakanui greensand on the seacoast near Kakanui Township. 
An interesting discovery of supposed Zeuglodon vertebrae on 
Seymour Island has recently been reported by Wiman.” All that 
is known of this form are two imperfect caudal vertebrae. There 
is a possibility that these vertebrae belong to a form related to 
Kekenodon. 
ARCHAEODELPHIS PATRIUS Allen. 
Archaeodelphis patrius ALLEN, G. M., Bull. Mus. Comp. Zool. at Harvard College, 
Cambridge, vol. 65, No. 1, pp. 1-14, pl., figs. 1-2, text figs. 1-3, August, 1921. 
Type specumen.—‘A cranium, lacking the bones of the vertex, the 
jugals, the teeth, and all but the nasal portion of the rostrum.’’ 
19 Thomson, J. Allan, The Notocene geology of the middle Waipara aud Weka Pass district, North 
Canterbury, New Zealand. Trans. and Proc. New Zealand Institute, Wellington, vol. 52, p. 328, 1920; 
Vaughan, T. W., Proc. First Pan-Pacific Sci. Conference held under auspices of Pan-Pacific Union, 
Special Publ. No.7, pt.3, pp. 722, 726, 731, table opposite p. 732, Bishop Museum, Honolulu, Hawaii, 
nee Hall, T. S., Proc. Roy. Soc. Victoria, Melbourne (n. s.), vol. 23, pt. 2, art. 23, p. 258, 1911. 
21 Park, J., Trans. and Proc. New Zealand Institute for 1904, vol. 37, pp. 509, 522, 523, 525, 529. 
22 Wiman, C©., Wissenschaftliche Ergebnisse der Schwedischen Siidpolar-Expedition 1901-1903, 
Stockholm, vol. 3, pp. 3-6, pl. 1, figs. 14, 1916. 
