10 Minute Anatomy of the ['foZT^.^S^^S' 
surface of the muscle, that nerve-tufts did not exist. These appear- 
ances at least, if they do not harmonize much of the contention 
which I have briefly alluded to, certainly show the value of the 
method of preparation. They might have been more highly mag- 
nified, but to embrace all the points shown and that no mistake has 
been made in reference to the nerve-tissues, it was necessary to keep 
the magnification within due bounds. In the breast-muscle of the 
common frog I have seen the same arrangement, save that the 
nerve has often a very tortuous or knotted appearance just before 
dipping down between the muscles, and which I expect depends 
either on the way in which the original compression has been made ; 
or else exists naturally, and permits of considerable play of the sub- 
jacent parts without detriment to the delicate adherent expansions. 
I am not quite prepared to admit these formations as dependent on 
nerve-textures in the course of formation ; but rather, if they have 
any speciality, as belonging to fully formed structures ; and that the 
final arrangement here is plexiform, whilst where impressions com- 
mence by contact with the outer world probably definite nerve- 
structures exist, varied in plan for their reception according to the 
nature of the primary impulse.* 
* Although Dr. Beale in his 'Archives ' has explicitly pointed out the views of 
many of the observers who differ with him as regards the relation of nerves to 
muscles, a short summary, borrowed in part from his Journal, may not be out of 
place here. I believe Rouget, Krause, Moxon, Engelmann, Kiihne, Doyere, Trin- 
chese, and several others, though diifering amongst themselves as to the manner of 
the connection of the axis cylinder with the motor plates, " plaques motrices," yet 
admit these bodies as being the terminals of the nerves. Kiihne considers the axis 
cylinder of the nerve to enter the sarcolemma in Hydrophilus and obtain contact 
with the contractile elements within ; and in the breast-muscle of the frog that the 
axis cylinder passes into the sarcolemma and terminates after division in peculiar 
oval bodies or in pointed ends. 
Kolliker does not admit the penetration of the sarcolemma by nerves, nor the 
existence of the peculiar bodies seen by Kiihne, but considers with him that the 
pale fibres which Beale finds form a delicate plexus, terminate in free extremities, 
the axis cylinder and white substance losing their several characters. Beale main- 
tains the fine nerve-fibres become more attenuated, and at last form a very delicate 
plexus with wide meshes on the sarcolemma. Kolliker distinguishes motor and 
sentient nerve-fibres in the breast-muscle of the frog: the motor divide and pass in 
a direct course to the muscular fibre, abruptly becoming pale and thin : the sentient 
fibres take a long course, dwindling in size until they are with difficulty distin- 
guished from the connective tissue on and between the elementary fibres. Beale 
acknowledges the expansion of the nerve on the elementary muscle, but interprets 
it differently to Kiihne ; he found he could strip tlie peculiar cells or nuclei from 
the sarcolemma. He believes every thread is composed of liner threads, one thread 
never forming the entire boundary of a single space, though it may assist in the 
formation of many ; that complete circuits exist which include central and peri- 
pheral nerve-cells, the latter usually regarded as nuclei which are connected by 
intervening fibres. He considers there are no special sensitive filaments distri- 
buted to muscle, and that the fibres in the fully formed muscle considered to be of 
this nature are motor ; he believes those so regarded to have belonged to muscular 
tissue at an earlier period of life, and that the only sentient fibres of muscles are 
some of the filaments which leave the muscle for the cutaneous nerve-fibres and 
those distributed to the capillary vessels. In this very rough outline it is impos- 
sible to enter all the opinions of various parties. Dr. Beale has the advantage of 
