„. Un. Prec. 
- 
ga 

Ventral view. 


Fic. 4.— The lateral v dit Raia erinacea and R. levis. 
arc. pct., pectoral girdle ; af. clc., cloacal aperture : ba’ft., basipterygium ; céc., cloaca; 
rt., rectal gland; fre. il., iliac process of pelvic girdle; r. pinn., pre-axial ray of 
pelvic fin; rez. va., 1 Joaca and rectum; r?., rectum; sz. cr., cardinal 
sinus; sz. AØ., hepatic sinus; sz. precav-, precaval sinus ; vn., venous sinus; v7. 
ial veins; væ. jug. if., inferior jugular vein; vr. l., lateral vein; vs. f’cr., 
y., veins from pelvic fin; vn. precr., precardinal vein. 
ór., b 
postcardinal vein; vz. 24 
