= 26 FISHES OF SAN DIEGO—EIGENMANN. 
* * The egg is small, with a zona radiata for covering; the young leaves it as a 
larva. : 
a. The egg is hatched in the mother. : 
b. All the intraovarian food is supplied by the large yolk, which always contains _ ; 
one or more oil-globules, Young leaving — 
mother in larval stages -...SEBASTODES. 
bb. Intraovarian food mostly supplied by secretions of the ovary. Eggs small, 
owing to the nonformation of food deu- 
toplasm. Development characterized — 
by the hypertrophy of the hind gutand — 
later by the hypertrophy of the fins and — 
theircapillaries. Young leaving mother } 
in a mature stage. ..-.-- EMBIOTOCID A, | 
aa. The egg is hatched in water. 
c. Nonpelagic eggs. 
d. Eggs very large, 5 millimeters or more in diameter. -.-. -. -- PORICHTHYS.+ — 
dd. Eggs much less than 5 millimeters in diameter. 
e. Zonaradiata without filaments or projections. 
f. Eggs cohesive (pelagic?) ; several oil globules..OLIGOCOTTUS ANALIS. | 
(Leprocortus. ?) 
Sf. Eggs adhesive, protoplasm yellow, no oil globules. 
CLUPEA MIRABILIS. 
ee. Zona radiata with filaments scattered over its whole surface. 
g. Filaments numerous, placed directly on the zona. 
FUNDULUS PARVIPINNIS. 
gg. Filaments few, very long, tapering, set in sheaths of the zona. : 
(GOBIESOCID.E.) 
h. Eggs large 2.4 millimeters in diameter, amber colored. i 
TYLOSURUS EXILIS. § 
ggg. Filaments few, their disk-like basal expansions hollow, fitting 
into projections of the zona. 
(ATHERINID A.) 
i. About ten filaments; several oil-globules during the early 
stages....-.-..-.--.....,ATHERINOPSISs 
cee. Zona radiata with filaments or other processes on restricted regions. 
j. Mushroom-shaped processes near micropyle. ; 
GASTEROSTEUS. 
jj. A meshwork of filaments attached in a circle about the micro- 
pyle. The zona much elongate, club- 
shaped, attached to lower surface of 
rocks, ; 
ZIPULOGOBIUS CALIFORNIENSIS. 
jij» Numerous fine filaments forming a cushion over nearly half 
the zona; yolk salmon pink; white 
and deep purple oil-globules. 
ISESTHES. 
k. Spawning in March in rocky tide pools of the ocean beach. 
I. GILBERTL. 
kk. Spawning in May in the bay. fe GENTILIS.. 
t We have not seen the developing eggs of this species. They are probably fast- 
ened to objects in some way or other. The male is provided with a large (nidamen- 
tal?) gland. 5 
§ The eggs of the other members of this family occurring here have not been ex 
ined, 
