EXPIAlfATIOlT OP THE PIATES. 661 



Plate XII. 

 Fig. A. Antedon regince, nat. size. A a. Cirrus, x 3. The arms are 

 correctly figured as thirty-eight in number ; five in the text 

 is a misprint. 



B. gyges, x 2. B a. Cirrus, x 4. B 6. Second pinnule, 



X4. 



Plate XIII, 



Fig. A. Antedon irregularis, X 2, A a, A 5, A c. Second, third, and 

 fourth pinnules, X 4. 



B. elegans, x2. Ba. Disk from belo-w. [In the descrip- 

 tion (p. 162) thirty arms instead of twenty have been 

 ascribed to this species by inadvertence.] 



Plate XIY. 



Antedon hriareus, nat. size, a, h. Second and fourth pinnules, 

 x4. 



Plate XV. 



Antedm microdiscus, nat. size, a, disk from below ; 5, second, 

 c, seventh pinnule, x 3; d, cirrus, x 2, 



Plate XYI. 

 Fig. A a. Basal joints of the second^innule of Actinometra aolctris, 

 x6. 

 A 5. Basal joints of the second pinnule of Actinometra im,t^- 



media, X 6. 

 A e. Basal joints of the second pinnule of Actinometra rohusta, 



X6. 

 B. Actinom tra copjaingeri, x 3, 



Plate XVII. 

 Fig. A. Actinometra paucieirra, x2. a. First pinnule, x4. 

 B, variabilis, nat. size. a. Second pinnule, x 4. 



