78 A. C. OUDEMANS. 
Fie. 21.—Through the cesophageal region. 
Figs. 22—27.—Carinella annulata (Mont.), McInt. See Figs. 2 and 4. 
Fic. 22.—Through the intestinal region. 
Fic. 23.—Through the cesophageal region to the left, curving downwards, 
and to the right upwards, thus becoming partially lacunar. 
Fic. 24.—Ditto, with two vessels in the sheath. The lateral vessels, each 
with an arch upwards, partially lacunar. 
Fic. 25.—Through the nephridial region. The left half of the figure shows 
a blood-vessel with the spongy nephridial gland lying in it, and a nephridial 
canal. The right half shows the same as the left one, but, in addition, the 
foremost open communication between blood-vessel and nephridial canal. 
Fic. 26.—Ditto. The left half shows the blood-vessel and the hindmost 
open communication between this and the nephridial canal. The right half 
shows the blood-vessel with the spongy nephridial gland lying in it, and a 
communication of the nephridial canal with this gland. 
Fie. 27.—Ditto. The two only excretory ducts of the nephridial system 
are situated in this section. 
Figs. 23—37.—Carinoma Armandi (MclInt.), Oud. See Fig. 5. 
Fic. 28.—Through the tip of the snout. Point of junction of the four 
large lacune. 
Fic. 29.—Through the precerebral region. Four large cephalic lacune are 
visible, two on each side of the proboscidian sheath. 
Fie. 30.—Through the cerebral portion. The four lacune have coalesced 
to form two, and with the proboscidian sheath protrude through the cerebral 
ring. 
Fic. 31.—Through the postcerebral region. The mouth lies in this section. 
Mutual connection between the six vessels: two lateral vessels, two supra- 
proboscidian sheath-vessels, and two vessels lying in the sheath. 
Fig. 32.—Through the esophageal region. The six longitudinal vessels are 
visible, 
Fic. 33.—Through the nephridial region. The vessels above and in the 
sheath have disappeared, terminating blindly. The two blood-vessels and the 
nephridial canals are visible. 
Fic. 34.—Ditto. The two only excretory ducts are visible in this section. 
The dotted line in Fig. 5 shows the direction of the imaginary sections 
represented in our Fig. 34. 
Fig. 35.—Ditto. On each side a blood-vessel and two nephridial canals, 
Fie. 36.—Ditto. The two nephridial canals coalesce. 
Fic. 37.—Ditto. Hindmost communication between blood-vessel and 
nephridium. 
Fic. 38.—Through the precerebral region of Tetrastemma candidum 
(O. F. M.), Oerst. See Fig. 6. 
Figs. 39 and 40.—Amphiporus lactifloreus (Johnst.), McInt. See 
Fig. 9. 
