EXPLANATION OP THE PLATES. 



GG1 



Plate XII. 

 Fig. A. Antedon reyince, 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 - m^ X 2. B a. Cirrus, x 4. Bb. Second pinnule, 



X4. 



Plate XIII. 



Fig. A. Antedon irregularis, x 2. A a, Ab, Ac. Second, third, and 

 fourth pinnules, x 4. 



B. eleyans, x 2. 15 a. Disk from below. [In the descrip- 

 tion (p. 1G2) thirty arms instead of twenty have been 

 ascribed to this species by inadvertence.] 



Plate XIV. 



Antedon briareus, nat. size, a, b. Second and fourth pinnules, 

 x4. 



Plate XV. 



Antedon microdiscus, nat. size, a, disk from below ; b, second, 

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



Plate XVI. 



Fig. A a. Basal joints of the second pinnule of Actinometra Solaris, 

 x6. 



Ab. Basal joints of the second pinnule of Actinometra inter- 

 media, x 6. 



A c. Basal joints of the second pinnule of Actinometra robusta, 

 X6. 



B. Actinom tra copjaingeri, x 3. 



Plate XVII. 

 Fig. A. Actinometra paucicirra, X 2. a. First pinnule, x 4. 

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



