FOSSIL FEATHERS AND UNDESCRIBED FOSSIL BIRDS 649 
the same being provisional, or until such time when we have more 
material of both fossil and existing forms wherewith to critically 
compare it. 
Hebe (new genus), the goddess of youth and spring of Greek 
mythology. 
The specific name is in honor of the eminent paleontologist of 
Yale University, Dr. Charles Schuchert. 
YALAVIS TENUIPES, gen. et sp. nov. 
(Fig. 11, ¢; Fig. 12; ¢’) 
From a study of the figures in the illustrations (fossil bones, 
etc.) it will be seen that in Fig. 12 (a) the specimen consisted of 
parts of the /eft pelvic limb, being the lower part of the tibio-tarsus; 
the tarso-metatarsus, and the toes complete. It is of the left 
limb for the reason that these are the actual bones, and the inner 
toe is to the outer side—that is, the first in order as we examine 
the foot. 
It belonged to a small passerine bird of about the size of any 
one of the North American warblers, such, for example, as the 
pine warbler (D. vigorsi) or a somewhat larger species. The éarso- 
metatarsus has a length of 15 mm., and is, together with the toes, | 
of notably slender proportions. 
The toe-joints can be easily measured in the figures, as they 
are exactly of natural size. 
The right foot of this specimen is doubtlessly to be seen at 
b on the same slab (Figs. 11, 12). Here the phalangeal joints 
occupy different positions. 
These bones belonged to some small passerine bird that cannot 
as yet be referred to with certainty. 
Birds of the same genus and species may or may not be still 
in existence; the probabilities are that they are not. 
This specimen indicates that it belonged to a highly specialized 
perching bird, with very much curved claws, and the claw of hallux 
not lengthened as in the larks and their allies. 
When we come to consider the vast number of small passerine 
birds that are in existence at the present time; and how many 
more there may have become extinct, representing such scores of 
