648 TOKUYASU KUDO 
the mouth. The fibers of the triangularis, already mentioned, 
which run into the orbicularis bundle have frequently been found 
before in the negro (Chudzinski, Popowsky, Loth). The in- 
sertion of the muscle in Mongolians is usually at the upper 
median part of the risorius bundle (figs. 1 to4and 6). I have not 
observed the division of the triangularis into several large por- 
tions (Macalister) in the Mongolians. 
In order to show the extent of the muscles, the following meas- 
urements (in millimeters) have been inserted, although they are 
merely of general interest. 
1. The breadth of the muscle at the lip commissure, according 
to Chudzinski, is 15 (12 to 19) in the negro on the average; 10 
(6 to 15) inthe Japanese (fifteen individuals) ; on theright side 6, 10, 
12, on the left side 9, 12 in the Chinese (three individuals) ; 
on the right side 7, 11, 14, on the left side 7, 8, 9, 10 in Euro- 
peans (five individuals) according to Kudo, according to Chud- 
zinski 11 on the average. 
2. The breadth of the muscle at the place where the risorius 
diverges, is 20 (10 to 33) in the Japanese; on the right side 15, 
25, 20, on the left side 10, 27 inthe Chinese; on the right side 14, 
20, 20, on the left side 13, 19, 15 in Europeans; 11 to 15 in the 
Hereros (Eggeling). 
3. The breadth of the muscle in the region of radiation is 38 
(29 to 55) according to Chudzinski, 37 (31 to 438) according to 
Eggeling and Loth in the negro; 45 (30 to 60) in the Japanese; 
on the right side 40, 65, 45, on the left side 35, 70 in the Chinese; 
on the right side 31, 35, 44, on the left side 30, 25, 40, 35 in the 
European, and according to Chudzinski an average of 38. 
Fig. 5. Male Japanese III, forty-four years old. The pars aberrans as- 
cendens of the platysma is lacking. The risorius consists of two arcuate bundles. 
Zygomatie separated at its insertion into a superficial and a deeper layer by the 
caninus. The caput infraorbitale is separated in the region of origin from the 
other two heads. The lateral marginal bundles, and especially the upper, are 
developed. The M. frontalis extends farther up, its lateral fibers are short and 
arcuate toward the ear. The auricularis is spread out like a fan; its posterior 
fibers are transverse; the anterior are interrupted for a distance. The occipitalis 
is strongly developed; its hinder fibers are more vertical, the anterior are in- 
clined forward, interlaced with the auricularis superior, and finally reach the 
conch in a fleshy condition. The auricularis posterior is divided into two 
portions, the lower of which undergoes a tendinous interruption. 
