Plate I.—FirstT DISSECTION OF THE SKATE. 
Thyroid. — 
Branchial Artery. 
N 
\ om, 
(Ad nat.) 
_~ Coraco-mandibular Muscle 
, 
Ventricle of Heart. ty, 
A Sg, 
Duodeno-hepatic Mesentery 
h Bile-duct, 
wit! 
Right Lobe 
of Liver. 
Ceeliac Arte 
Tleum, with 
Spiral Valve. 
Pancreas. 
Portal Vein and 
a, 
X thrown forward. 
Oro-nasal Groove. 
Gill supplied by first 
Afferent Branchial 
SBIR 
& 
ominal Pore. 
The ventral body-wall has been removed completely from the abdominal region, 
exposing the alimentary system in the abdominal cavity. 
have been spread out and the stomach slightly drawn away to the left. 
The lobes of the liver 
Anteriorly 
the skin has been removed from the region between mouth and coracoid bar and the 
afferent branchial system dissected out on the left side only. 
The heart is lying in 
its natural position in the pericardium. The veins are blue, arteries red. 
