38 
University of California Publications in Zoology [Vol. 27 
PAGE 
4'". Eggs deposited in grape-like masses, outlines of jelly around each egg 
distinct on exterior of mass. 
6. Egg mass small, cubic contents less than 50 cc., 75 eggs or less in one 
mass; general form of mass elongate; jelly very soft; two jelly coats 
around each egg, outer jelly coat, 3.25 to 4.44 mm. in diameter, 
inner coat, 1.63 to 1.94, egg, 1.47 to 1.62 mm. (pi. 10, fig. 29; text 
fig. W); egg greenish olive in color; deposited in shallow temporary 
pools, attached below surface to vertical plant stems 
Scaphiopus hammondii 156 
6'. Larger mass, 500 or more eggs in one mass; general form rounded, 
not elongate; three distinct jelly coats around each egg, individual 
eggs black above; entire laying of one female usually in one mass. 
7. Large mass, cubic contents 1000 cc. or more; outside dimensions 
of mass 65 x 75 x 100 mm. or more; outermost jelly coat on 
individual eggs, 7.55 to 9.10 mm., middle coat, 3.94 to 4.93, 
innermost coat, 3.10 to 4.00; egg, 2.06 to 2.30 (pi. 15, figs. 47, 48; 
text fig. CC); deposited in quiet water of ponds or in pools at 
the sides of slow-moving streams Rana aurora draytonii 240 
7'. Smaller mass, cubic contents less than 100 cc.; outside dimensions 
of mass 30 x 45 x 75 mm. or less; outermost jelly coat, 3.88 to 
4.47 mm.; middle coat, 2.58 to 3.35; innermost, 2.32 to 2.94; 
egg, 1.93 to 2.48 (pi. 16, fig. 50; text fig. AA); deposited in water 
of flowing streams, usually in the current, attached to rocks or 
pebbles on the bottom Rana boylii boylii 254 
7 ". Moderate-sized mass, outermost jelly coat, 4.23 to 4.78 mm.; 
middle coat, 2.22 to 2.72; innermost coat, 2.00 to 2.50; egg, 1.67 
to 2.00 (pi. 17, fig. 52; text fig. BB); deposited in ponds or road- 
side pools Rana pipiens 269 
4"". Eggs deposited in firm masses, the outlines of individual egg capsules 
not always showing conspicuously on the exterior; eggs yellowish, not 
blackish in color. 
8. Smaller masses, not more than 25 cc. in volume, outside diameter of 
mass not more than 30 mm., outer jelly coat around individual eggs 
about 8 mm. in diameter, egg 2.06 to 2.35 mm. in diameter; 
vitelline cavity about 4 to 6 mm. in diameter so that egg moves 
about freely (pi. 5, fig. 11; text fig. T); deposited in ponds or at 
sides of streams down to 150 mm. below surface of water and 
attached to vegetation ...Triturus torosus 54 
8'. Larger masses, 150 cc. or more in volume, outside dimensions 60 x 70 x 
80 mm. or more, individual jelly capsules about 10 mm. in diameter, 
vitelline cavity about 5 mm. in diameter; inside of vitelline capsule 
paved with green algae (pi. 8, fig. 19; text fig. V); deposited in 
ponds or pools along stream courses attached to vegetation beneath 
the surface Dicamptodon ensatus 81 
