Botany and Zoology. 491 
6. Note on Sauranodon; by O. C. Marsu.—The name Sauran- 
odon, given by the writer toa genus of Jurassic reptiles, appears 
to have been previously used in the same class 
thus preoccupied, it may be replaced by the name Baptanodon, 
for the extinct generic form, with Baptanodontide for the family, 
and Baptanodonta, for the Sibardes represented. 
May 20, 1880. 
III. Borany anp Zoouoey. 
1. Revision of the mirage Pigeon and Description of P. Eliottii, 
by Dr. Grorer Encetma St. Lo uis, 1880. Separately fasied 
from the Transactions of. the Academy of Science of St. Lonis, 
vol. iv, no. 1, pp. 161-190 (1-30), but printed in folio, to match 
the plates, 1-3.—The plates, illustrating Pinus sonata Engelm., 
are very fine, having been excellently drawn from nature on stone 
by Paul Roetter, and they give the whole port, saraabts and 
germination of this the Linihanonabet species of our Atlantic States. 
In appearance it is as it were intermediate between P. Tada and 
P. australis. 'The characters of the Pines and a sketch of former 
arrangements are surveyed in detail; the anatomy of the leaves is 
particularly attended to, and the character of the resin-ducts is 
turned to account as a very important eer 2 mark of affinity. 
The primary sections of the genus are re to two, founded 
mainly on obvious differences in the scales of a cones, viz: Strobus, 
with marginal unarmed umbo Se into Eustrobi and Cembre), 
and Pinaster, with dorsal and mostly armed umbo. Then the 
subdivisions are duaningtishad by the position of the duets within 
the leaf, “ whether sm wesw parenchymatous, or internal;” then 
the position of the female ament and cone, whether subterminal 
or lateral; and finally the number of rraeasey in the fascicle is taken 
into consideration in the second section; the first consisting wholly 
of five-leaved species. Although only such species and subspecies 
are enumerated as the author has himself examined, yet the list is 
almost complete. 
aad iibioatilia: ‘of California is reduced to a subspecies of P. 
Jlexilis, a marked one certainly, as to the cones; and P. Balfour- 
: Banksiana, being a year earlier than the name P. rupestris is of 
ines is retained for the 2 ees A second ae species is 
