136 Miscellaneous Intelligence. 
‘Aberrantia. 2 
TOXODONTIA. SIRENIA. 
Toxodon. Manatus. 
Nesodon. - Hatlicore, 
Rytina. 
PROBOSCIDIA. ‘ Halithesam. 
Elephas. Prorastomus. 
Mastodon. 
Dinotherium. 
IV. MISCELLANEOUS SCIENTIFIC INTELLIGENCE. 
1. Notice of ihe Scientific Results of the Expedition to the North Pa- 
cifie Ocean, under the command of Oom. John Rodgers i by W. Sri MPSON. 
; sagt a — to J. D. Dana, dated Washington, Dee. 1 , 1856. 
ana: Dear Sir—Our Expedition having returned, thinking you 
echt ihe interested in some account of the zoological results, I transmit 
herewith a acai view taken from the catalogues, which will give you 
some idea of t aracter and extent of what has been done. As the 
Expedition had for its object marine explorations and surveys only, no 
opportunity was afforded for inland research ; so that fishes and inverte- 
bi 
The principal object kept in view has been, when on coasts little known 
zoologi 1e numerical accumulation of species. This course was no 
_ only indicated By the importance of adding to our very imperfect know! 
ge of the geographical distribution of animals in those seas, but 
80 to speak, necessitated by the shortness of our stay at the different 
points visited. Minute anatomical examinations are always made 
difficulty on board ship, beside requiring much time; and if these be 
carried on during the few days spent in harbor, the collection of speci- 
district must be neglected ; in other words, for the sake of complete eX- 
aminations of two or three —— mis desiati is lost for gathering and 
riefly noticing a large num orms, many of which may prove to j 
be of the greatest interest to sci f 
The course pursued has been tliis, At each ae visited, daily ex , 
sions were made to such distances as were necessary for the collection n of 
=e 
2 
eee 
oe 
— 
é 
wi whose structure will not allow of preservation i 
mM ndiibrodiihiaten Planarie, etc.) These, if new species, were drawn and 
described in full wpon the spot, whatever expense of time m might be ne- 
as no other means exists of es their forms ane ne 
tacles. 
animals as expand ee tentaci ae itn or other parts under favora- 
ble circumstances (as polyps, holothurians, ‘bivalve mollusks, ete.), ge 
