22 MALONE JURASSIC FORMATION OF TEXAS. [bull. 266. 
Charles M. Wilson, and Mr. John W. Williams for favors rendered 
while I made headquarters at Sierra Blanca, and particularly to 
Mr. Williams, who showed much interest in the Malone investiga- 
tion, assisted in collecting, and facilitated the field work in every 
possible way, contributing in no small measure to its success. I deem 
it but simple justice to Doctor Stanton, and at the same time a pleas- 
ure, to state that I owe very much indeed to his full and generous 
cooperation in promoting every desired use of the collections under 
his charge, and in holding at my service a splendid knoAvledge of 
Mesozoic conchology and its literature and methods. And, finally, it 
is also due to Prof. William Bullock Clark, head of the geological 
department of Johns Hopkins University, to add that without his 
efficient planning of it as a whole, this contribution to American 
Jurassic paleontology could have been undertaken at this time, if at 
all, only under far greater limitations, both as to scope and as to 
facilities for research. 
