1887.] MICROSCOPICAL JOURNAL. 183 
cating with each other; these are odlzgue or longitudinal sections of the 
tubules. 
(4.) Spaces (bl. c.) in which the tubule sections are imbedded, filled with 
granular matter and blood corpuscles as in the green gland; these are 4lood 
Spaces. 
(5.) A large oval body (H,) not found in all the sections and not a proper 
portion of the liver; it is an excysted parasite. 
1. The capsule of the gland.—Attentive observation of the margin of 
the section will reveal in various places the edge of the capsule, the demon- 
* Pirate I[X.—‘ Liver’ oF Cambarus immunis. 
stration of whose existence has been made in the preliminary coarse examina- 
tion of the ‘ liver.’ This edge will, in some places, if the ‘section is a very 
thin one, be seen merely as a sharp line. It will almost never be traceable 
around the entire section, never unless the extremest care has been exercised 
in the preparation of the section, since accidents happening to the margin of 
the section at any place would destroy it first. But if it is detected in a num- 
ber of places, and at different places in different sections, as it generally can 
* EXPLANATION OF PLATE 1X.—Reference letters to all the figures. 
A. Main duct of the gland lobe. Ln. Lumen of tubule. 
b. m. Basement membrane. M. Protoplasmic substance of cell. 
b. c. Blood space surrounding the gland tubules. N. Nucleus of cell-of hepatic epithelium. 
bl. c. Blood corpuscles. P. Protoplasmic contents of nucleus. 
C. Lumen or ductule of the tubule. Figures are drawn with camera lucida. 
D. Surface view of tubule cells, Fig. 1. Cross-section of posterior lobe with sheathing 
E. Lumen of tubule. membrane somewhat diagrammatic; mag- 
F. Lumen of tubule shown at E and C. nified 46 diameters. 
G. Sheath or cyst of foreign body. Fig. 2. Cross-section of one tubule showing charac- 
G.m. General gland, sack, or capsule. teristic hepatic epithelium; magnified 240 
H. Section of foreign body. diameters. 
I. and J. Lumen of tubules cut across. Fig. 3. Two hepatic cells in position, L being at the 
K. Space between cells in epithelium. end toward the lumen ; magnified 410 diam- 
L. Outer end of epithelium cells. eters. 
