952, Prof. L. C. Miall on Dicranota ; 
PLATE XI. 
Fre. 12.—Giant-cell of epidermis, perhaps a unicellular mucous 
gland; n, nucleus; p, elongate process, passing through the cuticle. 
x 350. 
Fig. 13.—Pseudopods in section, with their attached muscles. 
a, extended ; 0, retracted. x 20. r 
Fic. 14.—Transverse section through prothorax and retracted 
head. The wall of the prothorax shows the cuticle, a number of 
giant-cells, and annular muscles with multiple insertions. In the 
middle of the section is the larval head, with its muscles and 
median chitinous septum. @s, cesophagus; sd, salivary duct; 
am, annular muscles; 7%, their insertions; gc, giant-cells; cs, 
chitinous median septem; 0, 7, the cephalo-thoracic orifice extends 
between these two points. The epidermis, with the exception of 
the giant-cells, is too delicate to be shown in this drawing. 
Fie. 15.— Part of wall of stomach, showing external longi- 
tudinal and internal annular muscles. The epithelium is granular, 
and partly withdrawn from the muscular layer. A number of 
vesicles or transparent prominences appear along the free border. 
x 200. 
Fie. 16.—Epithelium from fore end of stomach, showing folds 
or fasciculi. The large spherical cells towards the base of the 
epithelium are perhaps mucous cells, but I have no certain infor- 
mation as to their function (see p. 243). x 200. 
Fie. 17.—Epithelium of stomach, moderately folded on one side, 
and slightly on the other. The lumen is filled with filamentous 
substance. x 80. 
Fie. 18.—Junction of esophagus and stomach in longitudinal 
section. «as, cesophagus, with its epithelium and chitinous lining, 
c; tr, transverse or annular muscles of cesophagus; 06, b, blood- 
spaces of Gehuchten ; dm, longitudinal muscles of stomach; when 
these are followed from section to section they are found to emerge 
from beneath the annular muscles of the cesophagus. Observe the 
abrupt change from the cesophageal epithelium to that of the 
stomach. x 200. 
Fic. 19.—Isolated epithelial cells of stomach, with transparent 
prominences (phase of active secretion). x 350. 
Fie. 20.—Granular epithelium, with minute vesicles. The cell- 
walls are not visible. x 350. 
PLATE XII. 
Fic. 21.—Spiracle of larva in side view, as transparent object. 
x 100. 
