PLATE XXI. 



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

 specimen. 



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

 by Toppan. 



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



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



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



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



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



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



Fig. 305. Doris bilainellata, spicula; from a drawing by Dr. Stimpson. 



Fig. 306. Doris bilainellata ; from a drawing by Toppan of a Beverly speci- 



men. 



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

 drawing by Toppan. 



Fig. 308. Doris bilainellata, the branchite enlarged; from a drawing by 

 Toppan. 



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

 Toppan. 



