230 DR. E, KLEIN, 
except an occasional fold-like unevenness, I cannot find any- 
thing of glands. 
The measurements which I made of transverse sections through the 
Stenonian ducts in the guinea-pig are these : 
a. Near their nasal opening : 
Anterio-posterior transverse diameter. - 38 mm. 
Transverse diameter from side to side - 05] mm 
Transverse diameter of lumen . - 0°38 mm. 
Thickness of epithelium (column ciliated) - 00675 mm 
4. While in the bone of the palate : 
Anterio-posterior transverse diameter. - 2:02—2°7 mm. 
Transverse diameter from side to side . 0335—0O4 mm. 
Transverse diameter of lumen . . 038 mm. 
Thickness of epithelium (column’ ciliated) - 00675 mm. 
c. Having passed the bone of the palate : 
Anterio-posterior transverse diameter. - 1125 mm, 
Transverse diameter from side to side: . 0°2475—0°29 mm. 
Transverse diameter of lumen . 0°1125 m.m. 
Thickness of epithelium (stratified pavement) 0°0675—0°09 mm. 
d. Further towards the oral cavity, but surrounded laterally by the semi- 
lunar Stenonian cartilage : 
Anterio-posterior transverse diameter. - 101 mm. 
Transverse diameter from side to side. - 0 61—0°63 mm. 
Transverse diameter oflumen_ . . 0495 mm. 
Thickness of epithelium (stratified pavement) 0°06—0:007 mm. 
Thickness of the cartilage . : . O11—013 mm. 
Shown connecting the two extremities of 
the semi-lunar cartilage . : . 135 mm. 
e. Near the oral extremity, the duct being now cylindrical and the 
Stenonian cartilage at the two ducts “fused into a heart- -shaped 
capsule : 
Transverse diameter . é ; A - 069—0°7 mm. 
Lumen. . 0°56 mm. 
Thickness of stratified pavement epithelium 0064 mm. 
Thickness of cartilage, laterally. . . 0:15—016 mm, 
Tn all these measurements it must be understood that the 
transverse diameters, 7.e. the anterio-posterior as well as that 
from side to side, comprise the lumen and the lining epithe- 
lium only, the fibrous coat forming the proper wall of the 
ducts not being included. 
