30 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



EXPLANATION OF PLATE 5 



Fig. \. Mopalia phorminx Berry. Interior view of head valve of type 

 [549] : X 15. 



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

 [549] : X 15. 



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

 [549] : X 15. 



