BLOOD-VESSELS OF MUSTELUS ANTARCTICUS. 
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B. System of the cardinal veins. 
5. The precaval sinuses. 
a. The jugular veins. 
a. The orbital sinuses. 
i. The anterior facial veins. 
ii. The anterior cerebral veins. 
13 . The hyoidean sinuses. 
i. The posterior facial veins. 
ii. The nutrient hyoidean veins. 
b. The inferior jugular veins. 
a. The nutrient branchial veins. 
c. The cardinal veins. 
a. The renal veins. 
/3. The spermatic veins. 
y. The anterior oviducal veins. 
§. The anterior spinal veins. 
e. The posterior cerebral veins and the myelonal vein. 
£. The subscapular veins. 
C. System of the lateral veins. 
6. The lateral veins. 
a. The brachial veins. 
b. The iliac veins. 
a. The femoral veins. 
/3. The cloacal veins. 
D. System of the coronary veins. 
7. The coronary veins. 
E. System of the cutaneous veins. 
8. The dorsal cutaneous vein. 
9. The anterior ventral cutaneous vein. 
10. The posterior ventral cutaneous vein. 
11. The lateral cutaneous veins. 
A. i. System of the sub-intestinal vein : renal portal section. 
1. The caudal vein. 
Vena caudalis, Stannius (25). 
Veine caudale, Milne Edwards (14). 
Caudal vein, Huxley (10), Claus (4), &c., &c. 
The caudal vein (Plate 34, figs. 1 and 3 ; Plate 37, fig. 25, Caud. V .) lies in the 
haemal canal immediately ventrad of the caudal artery. It receives the lesser 
