CAMBJ.IDGE, MASS. 
Dr- P. W. True, 
May 27, 1906. 
U.S.Nat. Museum, 
Washington, D.O. , 
My dear Sir:.- 
There are preserved in this Museum a number of interesting fossil 
plonassa, and Leidy's ^'Delphinus'' oooiduus. These I have been studying recently, 
with the intention of preparing some notes upon theia; and because the rostrum of 
Anoplonassa seemed to present anomalous features, I submitted it to several of my 
New York friends for exaaiination, and finally offered it through Mr. Gidley for 
your inspection. In case you find it sufficiently interesting to ooament upon it, 
I should be very glad to quote in full any remarks that you may be pleased to offer 
for that purpose; or if you merely care to express an opinion as to its probable 
relationships, it ?^ould be very agreeable to me to be able to state it in the paper 
I am preparing. The specimen may be returned at your convenience with charges to 
be collected. 
clear notion as to the relations of this unique fossil, although there seems little 
reason to doubt its Cetacean, and perhaps Ziphioid (?) nature. In looking over 
Abel's recent memoir on Odontocetes, it struck me that there was considerable affin- 
ity between this rostrum and the form described by Abel as Mio z iphius belgious: but 
on this point I am sure you ?fill be able to enlighten us iBUch more clearly. Thank-- 
ing you in advance for ?matever communication you may choose to offer, I am, 
Very truly yours. 
Cetacean 
renins, a«„gst .hioh are the tjpes of Copes genera Lophocetus and Ano- 
I am free to admit that I have not been able to form any particularly 
