28 CALIFORNIA ACADEMY OF SCIENCES [Peoc. 4th Se«. 



EXPLANATION OF PLATE 4 



Fig. 1. Mopalia phorminx Berry. Dorsal view of head valve of type 

 [549] : X 15. 



Fig 2. Mopalia phorminx Berry. Dorsal view of valve v of type 

 [549] : X 15. 



Fig. 3. Mopalia phorminx Berry. Dorsal view of tail valve of type 

 [549] : X 15. 



