272 Scientific Intelligence. 
From this report, and the preceding remarks, it will be seen that fos- 
sils in sufficient numbers to determine the geological age of the deposits 
in which they occur have been obtained from many and distant points 
on the Pacific coast. 
The occurrence of Eocene strata at one point has been satisfactorily 
established. We also find that the Miocene division of the tertia 
formations is extensively developed, over broad areas, in California, 
flanking nearly all the great lines of elevation, not only in the coast 
mountains, but in the interior, along the borders of the San Joaquin and 
Tulare valleys. Further observations are required to connect, chrono- 
logically, the Miocene deposits along Ocoya creek with the extensive, 
and in many respects similar, strata further north, along the Tuolumne 
and Stanislaus rivers. 
sharks now living along the shores of the old and of the new world. 
(1.) Echinorhinus Blakei, Agassiz.—One of the most interesting and 
important discoveries since the publication of the ‘“ Poissons Fossiles 
is that of the tooth of the genus Echinorhinus, in the tertiary deposits of 
Ocoya creek (Posé creek), at the western base of the Sierra Nevada, 
es 
: &) imnus occidentalis, Agas.—The few species upon which Cu- 
vier founded the genus Scymnus have been of late subdivided by Miller 
and Henle int eo genera: Scymnus proper, and Lemargus ; all 
ich are y known among the living. It is another of the highl 
ig discoveries of Mr. Blake, to have brought home two 'e€ 
2 4 
ah ee es 
