EXPLANATION OF THE PLATE. 



Figs. 1-6. Atelecrinus halanoides nov. gen. & sp. 



Fig. 1. The best specimen obtained (No. 151, off Nevis). The first pinnule visible 



is on the 13th brachial, that borne by the 12th brachial being on the 



opposite side of the arm, and therefore out of sight. X 4. 

 Fig. 2. Portion of an arm between the 10th and 18th joints, showing the absence of 



pinnules as far as the 11th joint (inclusive). X 4. 

 Fig. 3. Side view of the calyx of another specimen. X 8. 

 Fig. 4. Eadials and basals from beneath. Tlie minute processes at the central ends 



of the basals are omitted. X 10. 

 Fig. 5. The centrodorsal from above. X 10. 

 Fig. 6. A single basal (without its central processes), a. From the outer side. 



b. From above. X 14. 

 Fig. 7. Atelecrinus cubensis. Pourt. sp. A single specimen dredged by Mr. Pour- 



tales, in 1869, off Cojima, near Havana, in 450 fathoms. X 8. 

 Fig. 8. Antedon columnaris n. sp. No. 222, off St. Lucia. X 4. 



