. o2, 
. 4. 
alae 
SEA-FISHERIES LABORATORY. 467 
Trans. section of rods. Zeiss apo. 1°. 
Trans. section of retinophorae. Zeiss. apo. 1°5. 
Argentea in surface view. Zeiss apo. 1°5. 
Kipithelial cells of eye stalk. Trans. sect. 
Zeiss apo. 1°5. ' 
Puate VIII. 
Alimentary canal of P. maaumus. Nat. size. 
Trans. sect. through upper part of descending 
loop of intestine, showing division into two 
compartments. x 40. 
Left inside of stomach, showing cavities into 
which ducts open. 
Mouth, lips (separated) and labial palps. 
Section of internal labial palp, across ridges. 
x 66. 
Crystalline style of P. maximus, showing two 
conditions. Natural size. 
Trans. section through crystalline style. x 7. 
Section of wall of intestine (same plane as 
fig. 37), showing cells of crystalline style 
cavity. x 244. 
Section of posterior part of ventricle and 
rectum. x 20. 
Wall of rectum, same section as fig. 48. x 300. 
. Wandering excretory cell (Hz.). x 300. 
Trans. section of ctenidial axis and bases of 
filaments, showing latter opening into afferent 
branchial vessel. x 16, 
