PLATE VIII. 



1. 



la. 



lb. 



1C. 



Id. 

 2. 



Lacinularia socialis 



Megalotrocha alboflavicans 



2c. 



3. 



oa. 



Bb. 



3c. 



8d. 



3c. 



Conochilus volvox . 







3A-, 3Z, 3m, 3. . 

 8p. . 



3?. . 



3r. . 



4. Conochilus dossuarius . 



dorsal view H 



side view H 



group H 



male ; side view H 



penis H 



dorsal view ....... H 



side view H 



ventral view ; corona expanded . . . H 



ventral view ; corona contracted . . . H 



side view ........ H 



ventral view H 



dorsal view H 



obliquely ventral view H 



male ; side view H 



cluster H 



cloacal opening H 



antennae ........ H 



eye H 



showing junction of lateral canal and cloaca . H 



successive stages of ephippial egg . . . H 



male in egg H 



spermatozoa . . . J after ^ Cohn 



spermatozoa attached to ovum . ) 



obliquely dorsal view H 



