1915] CLuPzEA PALLASII AND ICHTHYOLOGICAL NOTES. 117 
EXPLANATION OF PLATES 
DRAWINGS By CLARA A. FRASER 
PRATEY Vill. 
Fig. 1—Unincubated egg of Pacific herring, Clupea pallasit. 
Fig. 2—Egg after 1% hours. 
Fig. 3—Egg after 2 hours. 
Fig. 4—Egg after 3 hours. 
Fig. 5—Egg after 4 hours. 
Fig. 6—Egg after 8 hours. 
Fig. 7—Egg after 12 hours. 
Fig. 8—Egg after 24 hours. 
Fig. 9—Egg after 36 hours. 
Fig. 1o—Egg after 48 hours. 
Fig. 11—Egg after 60 hours. 
_ Fig. 12—Egg after 72 hours. 
Note.—Magnification in Figs. 1-12 24 diameters. 
PEATE EX: 
Fig. 13—Herring egg after 84 hours’ incubation. 
Fig. 14—Egg after 96 hours. 
Fig. 15—Egg after 108 hours. 
Fig. 16—Egg after 120 hours. 
Fig. 17—Newly-hatched alevin, dorsal view. 
Fig. 18—Newily-hatched alevin, ventral view. 
Fig. tg—Newly-hatched alevin, side view. 
Fig. 20—Fry with yolk all absorbed. 
NoTEe.—Figs. 13-19 magnified 24 diameters, Fig. 20 magnified 12 diameters. 
PEATE. |X. 
Fig. 21—Ophiodon elongatus. Newly-hatched alevin. X15 
Fig. 22—Cross section of the headin the region of the eyes. X24. a, brain; b, eye; c, lens; 
d, mouth. 
Fig. 23—Cross section of the head through the auditory organs. X24. a, brain; b, cavity 
of auditory organ; c, dorsai aorta; d, basal plate; e, mouth cavity; f, gill arch; 
g, auricle; #, ventricle; 7, pericardial cavity. 
Fig. 24—Cross section of the body through the kidneys. X24. a, spinal cord; 6, muscle; 
c, notochord; d, pectoral fin; e, dorsal aorta; f, kidney; g, digestive tract; 
h, yolk; 2, oil globule. 
Fig. 25—Cross section of the body through the liver and pancreas. X24. a, spinal cord; 
b, muscle; c, notocord; d, pancreas; e, digestive tract; f, liver; g, yolk; 
h, oil globule. 
