rOllEiaN INTELLIGENCE. 
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to our commonest plesiocetes ; but, in tlie conformation of the drum of tlie 
ear, in characters of the fragments of the inferior maxillary which had not 
been recognized, as also by the vertebrge from different regions of the 
body, this cetacean differed notably from all that the Crag Sea contained. 
We are able even to add, that it had nothing in common with the Ba- 
Icenodon of Owen.* 
" The Balfsnodon of Lintz is rather a ziphioid^ and we doubt much if 
the tooth which has been assigned to it belongs really to that animal. 
The tympanum of this pretended Balcenodon indicates the existence of 
characters far removed from the whalebone-whales of the Crag, and 
ally it to the Hyperodon or the ziphioids. For the rest, we believe 
we have recognized, among the undetermined bones in the Museum of 
Lintz, fragments of the inferior maxillary remarkable for their heiglit and 
their great flatness, and which leave hardly any doubt on the subject. 
Since our journey, this BalcBnodon has been designated in our manuscripts 
under the name of AvJocete, on account of the cranial furrow. 
" In the same sea of Upper Austria is found also a delphinoid which is 
unknown to science ; but unfortunately it is represented by a single tooth. 
" In the fine Museum of Stutgart we have found yet two other remark- 
able cetaceans of the same seaj the Arionius servafus of H. von Meyer,t 
. . . and a new ziphioid that we hope soon to see described. The latter 
has the seven cervical vertebrae isolated ; and the drums of the tympanum, 
still in place, are remarkable for their form, their large size, and, above all, 
for the great thickness of their solid walls. . . But of all the inhabitants 
of the seas of that age, undoubtedly the most interesting are the fossil 
sirenians known under the name of Halitherium. They inhabited the 
coasts, or rather the embouchures of rivers, which they could ascend some 
distance at need. To judge of them by the numerous relics found in dif- 
ferent localities, at Darmstadt amongst others, these strange animals in- 
habited in abundance the Sea of the Molasse, whilst the Crag Sea has 
not harboured any of their remains. In the present creation we see 
the sirenians chiefly in the tropical regions. The Senegal and the 
Amazon foster them abundantly. The finest skeleton known of the Ha- 
litherium is in the Museum of Darmstadt ; it shows the pelvis and a 
femur, of which the extremity is lodged in a cotyloid cavity. AYe are 
pleased to learn that Dr. Kaup, by whose pains so many paleontological 
treasures have been connected together, proposes to model completely this 
important relic of the ancient world. The Sirenians lived together with 
the Squalodons in the Sea of Lintz ; but it is probable that these bones at 
Darmstadt belong to individuals which had mounted high up the river, 
and which thus are found far from the other marine animals. It is pos- 
sible, also, that the waters below which these sands were deposited at Lintz 
and Darmstadt were brought by two opposing streams, like the Hhiue 
and the Danube of the present day. . . All the bones at Lintz have been 
found in a thick bed of coarse sand, situated immediately below the quater- 
* Hermann von Meyer has described this head at Lintz under the name of Ba/ceuo- 
don Lintanus, believing these remains ought to be placed with those which Owen had 
found in the Crag. But what we do not comprehend is that this learned paleonto- 
logist has been able to lind more affinity between the Balcenodon and the Zeuyhdon 
than between it and the Sqaahdon. See also C. Ehrlich, ' Geognostische Wanderungen,' 
Linz, 1850, p. 83, pt. ii.-iv. ; * Beitrage zur Palaontologie,' Liuz, 1855, p. 8. 
t H. von Meyer, Ariouatus Servatus, *Ein den Delphinen verwandtes Mceres 8;iuge« 
thier,' N. Jahrb. 1841, p. 315; * Palceontolographica,' vol. vi., Cassel, 1856-B8, p. 31, 
pt. vi. 
