118 Papers from the Department of Marine Biology. 
small ovaries, in telling where one region left off and the other began; 
the line between them, while not a definite and straight one, was very 
clearly discernible. 
TABLE 1.—Immature ovaries. 
Notes on ovaries and eggs. 
No. |Weight.|Length.| Girth. 
Posterior section. Anterior section. 
==" | grams. | mm. mm. 
1 21 45 35 Eggs below 0.5 mm. diam..... Eggsupto3 mm. diam. 
25] 4 56 36 Eggs below 0.5 mm. diam..... Eggs up to 2.5 mm. diam. 
3! 7.4 57 57 Eggs below 0.6 mm. diam..... Eggs up to 2.6 mm. diam. 
a 4 Theth 67 67 Eggs microscopic........... Eggsupto2 mm. diam. 
5 hid 87 67 Eggs below 0.5 mm. diam..... Eggs up to 2.5 mm. diam. 
26! S55 67 75 Eggs microscopic........... Eggs up to 2.5 mm. diam. 
Ave.| 6.4 63 56 Eggs not above 0.5 mm. diam.} Eggs not above 2.6 mm. diam. 
In this table are given measurements for 6 ovaries, varying in weight 
from 2.1 to 9.3 grams, in length from 45 to 87 mm., and in circum- 
ference from 35 to 75 mm., but it should be noted that maximum 
weight, length, and circumference are not all found in the same 
ovary. The average weight is 6.4 grams, the mean length 63 mm., 
while the average girth is 56 mm. On the whole, this set of ovaries 
presents a fairly graded series, specimens of which are seen in A, B, 
and ¢, figure 8, plate 4. 
SPENT OVARIES 
No. 1 in table 2 is a stray ovary found packed among immature organs 
of this kind. It is known to be spent because it has a number of torn 
and empty follicles. As to ovaries 4 to 8, some brief notes were made 
when the fish were dissected. They were preserved July 26, 1907, and 
comparison of the measurements made then with the above shows that 
the preservative has caused but little appreciable shrinking. Their 
live measurements were 2.25, 2.5, 2.75 inches over all, the average being 
2.5 inches. Because these brief data can be given, these ovaries are 
grouped together in the table. Unfortunately no record was made of 
the sizes of the fish possessing these organs, but this very fact indicates 
that they were normal in size, probably running 17 to 22 inches long, 
with the majority about 18 or 19 inches. 
It should be definitely noted here that the line is very clearly marked 
between the anterior region of functional eggs and the posterior one 
of small straw-colored eggs. The great masses of 3 to 8 mm. eggs 
found in this region in ripe ovaries have been swept clean away, 
leaving this portion of the ovisacs sparsely covered with very small 
eggs in a single layer set closely upon the germinal epithelium. It will 
also be noted that some ovaries, and they the largest, have eggs in 
the forward portion of the ovisacs ranging up to 8 mm. in diameter. 
The sparse references in my notes indicate that these ovaries were 
