XII. EXPLANATION OF THE PLATES. 
All figures were drawn from actual dissections. Fig. 1 was compiled from 
the dissections of three or four specimens, the others from a single specimen. 
The arteries are colored red and the veins blue. A vessel drawn in dotted 
lines signifies that it passes in or behind a bone, muscle, or organ. 
Fic. 
II. 
EEA OL. 
Ophiodon elongatus; Blue cod. 
. Represents a general lateral view of the vascular system. The hyoid 
vessels are cut and the arch moved caudad from its natural position to 
show the deeper branchial vessels, and a considerable part of the caudal 
‘portion of the body between the vent and the caudal fin is left out. 
. Dorsal view of an injected gill or branchial filament. Meshes of the 
capillary network are diagrammatic and are greatly enlarged. Injected 
with Hoyer’s chrome yellow gelatin mass. Natural size. 
. Dorsal view of a pseudobranchial filament. Efferent vessels in yellow. 
Its network is also greatly enlarged. Injected as Fig. 2. Natural size. 
. Lateral view of a portion of the efferent pseudobranchial filament 
artery. a injected as nig. 2. Leitz 3. (Oc. 1... eyes 
. Represents a ventral view of the union of the efferent branchial ar- 
teries to form the main arterial trunks, and also the large veinous 
trunks emptying into the precaval veins. Only the left dorsal branchial 
retractor muscle is indicated. A 15 lb. Ophkiodon, K %. 
. A portion of the viscera from the left and dorsal side. Opposite side 
of the stomach shown from Fig. 1. 40 lb. Ophkiodon, K 4. 
. Origin of the caudal vein from the ventral side, showing its relations 
with the lymphatic system. 15 lb. Ophktodon, xX %. 
. Deeper dissection of Fig. 7. showing the ending of the caudal artery. 
. Anterior view of a caudal vertebra, showing the caudal trunks in sec- 
tion. 15 lb. Ophkiodon, XK 4. 
. General lateral view of the blood supply to the kidney, testes, and uri- 
nary-bladder of a 15 lb. Ophioden, K 4. 
Dorsal dissection of the liver to show the main trunks. Portal system 
in blue and hepatic system drawn in outline. 201b. Ophkiodon, X \. 
(138 ) 
