﻿120 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 102 



The four species herein recorded, three of which are neAV, represent 

 the first intertidal records for the genus from California. 



KEY TO THE CALIFORNIA SPECIES OF MUNNA 



(/\ Uropods small, loaflike, lacking spinelike protuberances. Male first pleopods 



apically pointed M. ubiquita, new species 



al Uropods round in X-section. Male first pleopods with apices laterally 

 expanded. 

 6\ Uropoda at least with one large spinelike protuberance. Dentate suburo- 

 podal shelf lacking. 

 c\ Lateral borders of pleotelson smooth, devoid of large 2-pointed setae. 



M. chroniatocephala, new species 

 c". Each lateral border of pleotelson with 2 to 3 large 2-pointed setae. 



M. stephenseni Gurjanova 



&^ Uropods lacking large spinelike protuberances. Dentate suburopodal shelf 



visible in dorsal view M. halei, new species 



MUNNA UBIQUITA, new species 

 FiGUKES 46-^8 

 Munna minuta Hansen, Hatch, 1947, p. 173, not figs. 42-44. 



ffolotype. — Male, length 0.8 mm., width 0.4 mm. 



Allotype. — Ovigerous female, length 1.2 mm., width 0.6 mm. 



Diagnosis. — Eyes on fairly long immovable stalks, preorbital lobes 

 well developed. Pleotelson with about six serrations on each ventro- 

 lateral margin. Plagellum of first antenna composed of three joints, 

 last joint slightly shorter than second, which is about twice length of 

 first, terminal joint with r, single sensory filament at apex. Adult male 

 and female gnathopods similar. Male first pleopod apically pointed, 

 not laterally expanded. Second male pleopod with apex of exopod 

 acutely pointed. Suburopodal shelf not evident. Uropodal ventral 

 branch tliin, leaflike, lacking spines. 



Character of body. — Minute, mitelike, legs spindly. Patch of black 

 chromatophores, above uropods and on male pleopods, distinctive. 

 Antennae and body witn scattered black chromatophores. 



Cephalon. — Frontal margin slightly emarginate, devoid of spinelike 

 setae. 



Peraeon. — Epimeral plates evident in dorsal view on somites 2-7. 



Pleon. — Pleotelson with few setae and no 2-pointed setae. 



Second antenna. — As long as body. No squama observed, although 

 a large seta occupies the place usually occupied by squama on third 

 peduncular article. Flagellum with about 10 separate articles, first 

 much longer than second. 



Mamilliped. — With three coupling hooks. 



First maxilla. — Outer lobe with about 11 apical setae, inner lobe 

 with 3 apical setae. 



