405 
markable difference between the median and lateral buds 
figured by Gegenbaur in Siebold and Kélliker’s ‘ Zeitschrift ’ 
for 1856; but knowing by experience the inaccuracy of his 
delineations, I would suggest that a link between Appen- 
dicularia and Doliolum seems to be indicated in the general 
resemblance of structure between the side buds of the latter, 
and the form of Appendicularia (fig. 5) described by me in 
the 17th volume of ‘ Linnean Transactions.’ 
On the PERIPHERAL DisTRIBUTION of NON-MEDULLATED 
Nerve-Fisres. By E. Kirin. (With Plates XIX, XX.) 
AFTER the terminations of non-medullated nerve-fibres had 
been discovered in the tactile corpuscles of the skin and in 
the Pacinian bodies ; after Max Schultze had come forward 
with his surprising and stirring doctrine as to the special ter- 
minations of some of the nerves of the higher senses, and 
Krause had described what were named by him the “ club- 
shaped extremities’ in many nerves of common sensibility, 
as well as in those of the conjunctiva, oral mucous membrane, 
and genital organs ; and after special terminal-apparatus had 
been found out in the striated muscles,—the doctrine of a 
terminal network of nerves in general seemed to be finally 
set aside, especially in the case of the nerves of cominon sen- 
sibility, which, according to it, break up imto a network in 
the most superficial layers of the skin and mucous membranes, 
consisting sometimes of thin fibres partly medullated, partly 
non-medullated, or bending round to form a loop. Indeed, 
within the last ten years a great number of treatises have 
appeared on the modes of termination of the peripheral non- 
medullated nerves, showing in general that special terminal 
apparatus are to be found in the most various organs and in the 
most various nerves. Here I can call to mind only the termi- 
nation of the nerves of common sensibility in the branching 
corpuscles lying between the epithelial cells of the rete Mal- 
pighii of the skin (1) ; the so-called terminal corpuscles of the 
genital nerves (2); the termination of nerves in the nucleolus 
of the smooth muscular fibre (3) ; the knob-shaped termina- 
tion of the corneal nerves in the precorneal fluid (4); the 
ending of nerves in the corneal corpuscles (5); the nerve- 
termination in the nucleoli of the epithelium of the tail of the 
tadpole (6) ; and in the branched cells (7) of the same organ ; 
the terminations of nerves in the pear-shaped structures of the 
