NEOZOIC INVERTEBRATES 
III 
embedded in a very tough matrix that the characters are not all deter¬ 
minable, but it should be recognizable from those above enumerated. 
It recalls the recent species of the same region, like M. fupilla 
Gould, though less elaborately sculptured. 
Dentalium sp. 
Locality . — Upper beds, 3374. 
A large species of Dentalium occurs in these beds, rounded at the 
upper part with transverse feeble striation, the more slender portion 
behind smooth and obscurely six-sided, an appearance which may be 
due to pressure. It reaches a length of at least 70 mm., and a diam¬ 
eter near the aperture of 5 mm. 
The total Eocene fauna of the Stepovak Series above 
described thus comprises at least thirty-four species, and 
it is probable that by continued and systematic collecting 
a very much larger number might be obtained. 
II. MIOCENE FOSSILS FROM THE SHUMAGIN ISLANDS 
In 1865, 1872, and other later dates the writer collected 
specimens from the Crepidula bed over the leaf beds in 
the northwestern peninsula of Unga Island, Shumagins. 
Collections were also made in 1874 on the north shore of 
Popof Island, between Popof Strait and Pirate Cove. 
During the stay of the Harriman Expedition at Humboldt 
Harbor, Sand Point, Popof Island, Mr. Trevor Kincaid 
also collected from the Popof Island beds. The number 
of species being small, I have combined them in one list. 
The locality numbers are as follows : 1 
2103. Coal Bluff, Unga Island, Miocene horizon above 
the leaf beds, collected by Dali in 1865, 1872 and 1880. 
3563. Miocene stratum, same horizon as the preceding, 
collected by Dali in 1874 and 1880, north shore of Popof 
Island. 
3372. Same horizon, north shore of Popof Island, col- 
'The collections are in the U. S. National Museum, Washington, D. C. 
