[Pesala ee INIA. 
The publication of the Memoir by Dr. Arnold E. Ortmann upon “The Craw- 
p) 
fishes of the State of Pennsylvania,” concludes the Second Volume of the Memoirs 
of the Carnegie Museum. 
The paper on “The Osteology of Haplocanthosaurus” by Mr. J. B. Hatcher 
was the last paper from his pen to appear in the publications of the Museum. He 
died on July 3, 1904, and the sole responsibility for the supervision of the Memoirs 
and Annals of the Museum devolved upon the writer, who without any assistance 
has endeavored to perform the combined task of proof-reader and editor of the pub- 
lications, a task which, while in some respects pleasant, has laid a great burden 
upon him, taxed as he has been by the care of several departments of activity in 
the museum, and the general supervision of the whole. 
The pleasurable and consolatory reflection always remains, that by these publi- 
cations very important additions are being made to the sum of human knowledge. 
The first Memoir in Volume IV. upon “ Early Chinese Writing” has been pub- 
lished, and the first Memoir in Volume III. upon the Archeology of the Pacific 
Slope of Costa Rica by C. V. Hartman is in press and shortly will be given to the 
public. 
W. J. Hoxanp. 
December 1, 1906. 
ill 
