134 Proceedings of the Royal Irish Academy. 



xlvii. 1864. Verrill, A. E., List of the Polyps and Corals (sent by the 

 Museum of Comparative Zoology to other Institutions in 

 exchange), with annotations. Bull. Mus. Comp. Zool., 

 Harvard, i., No. 3, pp. 29-40. 



xlviii. 1865. A'eerill, A. E., Synopsis of Polyps and Corals of N. Pacific 

 Expedition, Part ii., Alcyonaria. Proc. Essex Instit., 

 vol. iv., pp. 148-196. Plates v. and vi. 

 xlix. 1897. Whitelegge, Th., The Alcyonaria of Funafuti, Part ii. 

 Mem. Australian Mus., iii., pt. 5, pp. 307-320. 2 Plates. 

 1. 1889. Wright, E. P., and Studer, Th., Eeport on the Scientific 

 Eesults of the Voyage of H.M.S. " Challenger." Zoology, 

 vol. xxxi., Alcyonaria. 



DESCRIPTION OF PLATES. 

 Fig. 



1. Polyp of Scirpearia peetinafa enlarged ( X 25) to show structure. 



2. Portion enlarged of Monaco specimen to illustrate the motility of the 



polyps. 



3. Cross-section of a Juncellid axis to show the concentric laminae and 



the " ridges and depressions." 



4. a-(/. " Clubs " of JuiiceUa, (e-g) showing characteristic variations. 



5. a and b. Two kinds of double-clubs. 



6. Variation forms of double-clubs. 



7. Double-wheels or capstans. 



8. Transition from the elongated double-club (a), through the double- 



spindle (b), to the simple spindle (c). 



9. Three portions of var. a. of Juncella juncea to show the disposition and 



nature of the polyps, (a) near the base of the colony, (b) midway, 

 (c) near the tip. 



10. Cross-sections of var. b. of J. juncea to show the internal structure. The 



levels of (a), (b), and (c) correspond to those of fig. 9. 



11. Three views of the superficial appearance of the axis in J. juncea. The 



portions shown are from the parts of the colony given in fig. 9. 



