212 General Notes. [Februar 
others taught that the skull consisted of a certain number of mod- 
ified vertebrae; and Miller and others investigated the cranial 
nerves in the light of this theory. Gegenbaur has more recent 
shown that the method of these anatomists was wrong, and that 
the segmental nerves and visceral arches are the factors. In M 
Marshall’s own words: “ While the school of morphologists ¥ 
first dealt with, determined the number of the segmental nerves 
by that of the skull-segments, Stannius showed conclusively that 
there was no relation whatever between the two, but that there 
was a very definite and remarkable one .between the segmental 
nerves and the visceral arches.” Gegenbaur went a step further — 
and, starting with the segmental nerves and visceral arches, de - 
Balfour and Mr. Marshall. After giving a clear summary of 
evidence of the segmental value of the cranial nerves, Mars 
then considers these nerves in order. The paper closes with 
a convenient tabular view, while the illustrations aid the learner 
very materially in understanding this difficult subject. 
an interesting case of reversion to an ancestral form. 
was that of an adult male, and the anomaly consisted of a stri 
tendinous connection, about an inch in length, between the | 
dons of the flexor longus digitorum and flexor longus po! cls 
the region where they cross each other on the instep. This 
-is a permanent feature in the foot of the gorilla, where the. 
of the great toe sends on a branch, which, after uniting W 
long flexor tendons of the second and fifth toes, divides mto 
perforatory tendons of the third and fourth toes. In the oram 
man the big toe can be flexed to a considerable extent ine 
acteristic of this class of animals is the possession of rotary 
yet it appears that species of Rotifera exist that have 4 
characters of the class, but are devoid of vibratile cil 
first to notice this was Dujardin, who, in 1841, gave the nal 
Lindia torulosa to his discovery. Gosse, in 1851, described @ 
with similar characters. Doubt was thrown upon these 0 
tions, but Dr. Joseph Leidy has recently (Proc. Phil. Acad, 
