110 first Annual Beport 
Subclass CIRRIPEDIA 
Numbers of species of barnacles occur at Laguna and the begin- 
nines of a study of them was made which will be continued later. 
Subclass COPEPODA 
Tisbe californica n. sp. 
(Figures 58 and 59) 
During a few weeks in July, some of the high tide-pools remained 
for days without change of water, and each day became very warm 
at noontime. Mnormous numbers of an apparently red Copepod 
appeared in these pools. This species appears to me to be a Tisbe 
close to Tisbe furcata but differing as follows: The terminal flagel- 
lum of the female antenna appears to be five-jointed, the produced 
angle of the last joint of the basal portion being extended beyond the 
first joint of flagellum. The sete of the mandibular palpi are numer- 
ous and longer than the palpi. The longest caudal sete are much 
longer than abdomen. Other details are shown in the figures. 
Diaptomus stagnalis Forbes 
(Figure 60) 
Harry Hall used the tow-net industriously in the two small ponds 
in the canyon above Laguna, with rich results. Among other things 
he took specimens of a colossal Diaptomus, which fit the descriptions 
of stagnalis very closely and which correspond with remarkable 
closeness to the figures of Herrick’s Diaptomus giganteus, which is 
considered synonymous with stagnalis. The color in eastern speci- 
mens appears to be variable. Here it has a semi-transparent body, 
pale bluish ventrally as are also the feet, and with the antenne pale 
yellowish to colorless. DeGuerne and Richard complain that this 
species was never properly illustrated, so I have tried to prepare a 
plate for it. 
Subclass OSTRACODA 
Cyprinotus californicus n. sp. 
(Figure 61) 
This minute species (length .5 to .8 mm.) was taken by Mr. Hall 
in considerable numbers in the freshwater ponds with Diaptomus 
stagnalis. Color pale translucent greenish. The shell is thickly 
covered, especially distally in all directions from the hinge, with 
minute papille bearing fine hairs, which are longer towards the 
margins. Right valve armed anteriorly with small dark marginal 
teeth. The four weakly plumose natatory sete of the second antenne 
exceed the longest terminal claws by one-half the length of the 
