Plate XXIII. 



1. Alcyonidium parasiticum, nat. size, p. 310. 



2. Flustrella liispida, enlarged, p. 311. 



3. Vesicularia spinosa, nat. size. 3a, Enlarged, p. 313. 



4. Amathia lendigera, nat. size. 4a, Enlarged, p. 314. 



5. Bowerbankia imbricata, nat. size, p. 315. 



6. Mimosella gracilis, nat. size, p. 323. 



7. Pedicellina cernua, enlarged, p. 326. 



