iio jTirst annual Report 



Subclass CIRRIPEDIA 



Nuinbers of species of barnacles occur at Laguna and the begin- 

 nings 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. Enormous 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 setae of the mandibular palpi are numer- 

 ous and longer than the palpi. The longest caudal setae 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 i>t<i(/ii(il'tH very closely and which correspond with remarkable 

 closeness to the figures of Herrick's Diaptomus giganteus, which is 

 considered synonymous with $tii<iiniH*. The color in eastern speci- 

 mens appears to be variable. Here it has a semi-transparent body, 

 pale bluish veutrally as are also the feet, and with the antennae 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 papillae bearing fine hairs, which are longer towards the 

 margins. Eight valve armed anteriorly with small dark marginal 

 teeth. The four weakly plumose natatory setae of the second antennae 

 exceed the longest terminal claws by one-half the length of the 



