176 FISHES OF SAN DIEGO—EIGENMANN. 
PLATE X. 
Figs. 1-5. Stolephorus compressus, 
Fig. s First egg found April 24. A & 4. 
. Ovum procured April 26 and hatched in 60 hours. A & 4. 
The same 10 hours after, Fig. 2. A & 4. 
. Another, older embryo. A & 4. 
. Alarva some time after hatching. A & 4. 
3 Figs. 6-9. Species No. 1. 
Fig. 6. An undetermined egg, found Au- | Fig. 8. Another egg found August 28. 
om oo tot 
gust 14. A & 4. A & 2. 
7. Thesame four hours later. A &4. | 9. The larva on hatching. A & 4. 
Figs. 10-13. Species No. 2 
Fig. 10. An egg procured April 26. | Figs. 11-13. Later stages of the same. 
PLATE XI. Clupea mirabilis. 
These figures were made with a coverslip camera and a Bausch & Lomb 1-inch 
objective and B ocular. 
Figs. 1- 4. Forming blastodisk about one | Figs. 
hour after fertilization. 
5-14. The ingrowth and receding of 22, 
the first cleavage furrow. 
20. After eight hours and a half. 
21. After twelve hours. 
. After twenty-three hours. 
. After thirty-six hours. 
bo bk bo bt 
Be Or 
15. Beginning of second furrow. 25. After forty-five hours. 
16,17. At completion of second seg- 26. After forty-nine hours. 
mentation. 27. After fifty-four hours. 
18. At completion of third seg- 28. After fifty-five hours. 
mentation. 29. After seventy-eight hours. 
19. After 4 hours and a half. 
PLATE XII. Stolephorus ringens and delicatissimus. 
All figures drawn with an Abbe camera and A. and 2 of Zeiss. 
Fig. 1. The blastoderm well segmented, bridging over the depression in the yolk 
forming the segmentation cavity. Optical section. The periblast lining 
the base of the cavity. Probably thirteen hours old. 
2. Gastrula covering about half the yolk, the anterior and posterior lips equally 
advanced. Showing the segments of the yolk, which, for convenience, are 
omitted from the other figures. 
3. About eighteen hours old. 
4. Between nineteen and twenty hours old, showing that the blastopore closes 
at or very near the entodermic pole of the egg. 12:30 p.m., April18.  ~ 
5-10. Illustrate the different stages between Fig. 4 and the time of hatching. 5 
sketched at 2:30 p.m.; 6 at 2:59 p.m.; Tat3:40; 8at4:45; 9at 8:30; 10 at 
4p.m., April 19. 
11. Sometime after hatching; 1:30 p.m., April 20; 1.47 millimeters long. 
12. Sketched at 8 a. m., April 21, 1.79 millimeters long. 
13. Sketched at 4 p. m., April 21, 2.12 millimeters long. 
14. The oldest larva seen (forty-eight hours after hatching). 
PLATE XIII. Atherinopsis californiensis. 
All the figures are made from living eggs. Figs. 2-12 Abbe camera, D and 2; Figs. 
1 and 13-23 Bausch and Lomb 1 inch and B, coverslip camera. 
Fig. 1. Base of one of the filaments of the zona. The zona somewhat shriveled, 
the yolk having been removed. 
2-9. A series of sketches showing one of the waves of contraction approaching 
the ectodermic pole, and the stage (Fig. 9) just preceding another of these 
waves, 
Settee 2 ee ee en ~ 
a El EE 
ee as 
