VIVIPAROUS FISHES OF THE PACIFIC COAST. 
417 
These lists, arranged according to the size of the parent, give the following results ; 
Date. 
Length of 
mother. 
j Condition of young. 
Number. 
Date. 
Length of 
mother. 
Condition of young. 
Number. 
1890. 
Nov. 1 
160 
1 f.n 8 p.aIIs 
18 
1891. 
Jan. 21 
155 
Dec. 23 
150 
17 
25 
165 
6 2 jnm 
20 
23 
150 
Eighth segmentation . 
10(f) 
25 
162 
15 mm 
15 
1891. 
Jan. 11 
155 
6 to 11 mm 
17 
May 24 
24 
150 
Just born 
Born some time 
Average number of young, about 16. Duration of gestation, about 5 months. 
1890. 
1891. 
Nov. 30 
140 
36 cells 
21 
Jan. 1 
145 
1 2 mm 
Dec. 15 
137 
13 
140 
Q mm 
18 
135 
J ust hatched .... 
11 
J 
140 
^ mm 
18 
135 
16 
1 
145 
g mm 
23 
140 
Yolk inclosed 
14 
4 
140 
3 mm . I ’!!!’!.! 1 !.!!! ! 
19 
23 
135 
do 
10 
4 
145 
12 mm 
20 
28 
140 
19 
8 
140 
18 
8 
138 
5mm 
22 
1891. 
8 
137 
5§ mm 
16 
Jan. 1 
135 
4 ripe eggs 
11 
134 
2.5 mm 
9 
1 
140 
7 mm 
21 
145 
7 mm 
1 
140 
Not ripe 
25 
147 
18 
140 
J ust hatched 
25 
145 
2 
1 
140 
6 mm 
u 
May 24 
140 
J ust born 
Average number of young, about 16. Duration of gestation, about 5 months. 
1890. 
Nov. 30 
Dec. 18 
1891. 
Jan. 1 
Segmentation about 
complete 
Not ripe 
Not ripe 
15 
11 
Blastopore closing 
2.6 mm 
7 
1891. 
Jan. 8 
8 
8 
8 
11 
25 
25 
May 24 
120 
122 
124 
120 
121 
120 
120 
120 
120 
Just hatched . . 
Segmenting 
do 
do 
do 
Hatched 
11 
14 
13 
12 
5 mm 
Born some time. 
Average number of young, about 11 J. Length of gestation (longest possible time, 6 months 24 days; 
shortest, 4 months 16 days), about 5 months. 
1890. 
Dec. 15 
106 
Segmentation com- 
plete 
9 
18 
105 
do 
10 
28 
HO 
1 
28 
103 
1891. 
Jan. 1 
115 
13 
4 
no 
Segmenting 
7 
4 
115 
do 
10 
4 
no 
do 
8 
4 
115 
2 mm 
12 
4 
112 
Segmenting 
1891. 
Jan. 11 
118 
Segmenting 
7 
120 
5 mm , 
9 
25 
112 
2 mm 
Apr. 19 
100 
14 mm 
8 
24 
110 
1 mm 
g 
May 24 
100 
18 mm 
5 
31 
118 
25 mm 
8 
31 
112 
22 mm 
8 
31 
107 
7 
31 
100 
20 mm 
31 
100 
22 mm 
5 
31 
100 
20 mm 
6 
Average number of young, about 8. Duration of gestation, somewhat over 5 months. 
1891. 
Apr. 19 
80 
1891. 
May 31 
1 - 
90 Not mature 
19 
85 
4 mm 
7 
From these lists the fact mentioned before, that the larger individuals are with 
ripe eggs earlier than the small, becomes quite evident. 
The very largest, 150 to 160 mm., have ripe eggs as early as November 1. 
Those from 120 to 140 mm. have ripe eggs by November 30 or about December 1. 
Those from 100 to 120 mm. have ripe eggs from December 15 to January 1. 
F. C. B. 1892 27 
