120 Papers from the Department of Marine Biology. 
ovisac is 98 mm. The opened right one contains 23 empty follicles. 
Toward the hinder portion of this pouch are seen great numbers of 
much produced folds of the germinal epithelium of the oviducal 
section of the egg-bag. Some of these folds were as much as 9 mm. 
TABLE 3.—Spent ovaries—second lot. 
Girth. Miscellaneous notes. 
Left ovisac 10 mm. longer than right one. 
Girth of neck of oviduct 70 mm. 
Right ovisac had 13 empty follicles. 
Right ovisac with 31 empty follicles, left with 16. 
Right ovisac with 23 empty follicles. See fig. 5, pl. 3. 
Left ovisac 95 mm. long. Girth neck oviduct 53 mm. 
Largest eggs up to 7 mm. diameter. 
Right ovisac 90 mm. long and 95 mm. in girth. 
1 
2 
3 
4 
5 
6 
7 
8 
Ave. 62.8 | 53.3 
high. These, however, bear no eggs. Anterior to these and in the 
middle section of the ovary are the many ruptured follicles of the 
small straw-colored, non-functional eggs which always break away 
and pass out with the functional eggs. These latter come always from 
the anterior region of each pouch. Here are seen their empty follicles 
and between them eggs 3 to 5 mm. in diameter. These are the 
beginnings of next year’s crop. The wall of this ovary is very much 
contracted, thick, stiff, leathery, in marked contrast to the thin 
parchment-like wall of this section distended in the pregnant organ. 
Equally marked is the delimitation of the ovigerous part of the ovisac 
into regions bearing functional and non-functional eggs. In the later 
the larger eggs have the longer pedicels. 
The data for No. 4 show the shrinkage possible in a spent ovary. 
This ovary (which is less than twice as large as the smallest one re- 
corded in this table and but slightly more than half the size of the 
largest) has 31 empty follicles in the right sac and 16 in the left; it 
carried 47 eggs, ranging from 17 to 22 mm. in diameter, and yet in the 
spent state it weighs but 53.3 grams (less than 2 ounces) and is only 
82 mm. (slightly over 3 inches) long and 120 mm. in circumference. 
Ovary No. 7 of table 4 has had its ovisacs split apart and the left 
one dissected. This sac has a length of 103 mm. It contains 15 
empty follicles, partly resorbed, and about 45 eggs from 7 to 12 mm. 
in diameter. In the other sac 12 mm. eggs were also found. The 
finding of empty follicles and such large eggs in the same ovary tends 
to confirm the hypothesis that there may possibly be two layings 
in a season. 
The largest ovary of the first lot, No. 18, weighed 26.9 grams and 
measured 67 by 120 mm.; the smallest of the second lot weighed 31.1 
