PLATE XXI. 



Fig. 297. Doris coronata, Agassiz ; from a drawing by Toppan of a Beverly 

 specimen. 



Fig. 298. Doris diademata, Agassiz, the branchial plumes ; from a drawing 

 by Toppan. 



Fig. 299. Doris coronata, Agassiz, the anterior under surface. 



Fig. 300. Doris diademata, Agassiz ; from a drawing by Toppan. 



Fig. 301. Doris diademata, an enlarged view of tentacle. 



Fig. 302. Doris diademata, an enlarged view of the tentacle sheath. 



Fig. 303. Doris diademata ; from a drawing by Toppan. 



Fig. 304. Doris diademata, an enlarged view of tentacle. 



Fi"-. 305. Doris bilameilata, spicula; from a drawing by Dr. Stimpson. 



Fig. 30G. Doris bilameilata; from a drawing by Toppan of a Beverly speci- 

 men. 



Fig. 307. Doris bilameilata, enlarged view of branchial plume; from a 

 drawing by Toppan. 



Fig. 308. Doris bilameilata, the branchiae enlarged; from a drawing by 

 Toppan. 



Fig. 309. Doris bilameilata, enlarged view of tentacle; from a drawing by 

 Toppan, 



