HYDROCORALLINE GENUS EKKINA. 895 



(4) S. J. HiCKSON & Helen M. England. — The Stylasterina of 



the Indian Ocean. Trans. Linn. Soc. xii., 19U9. 



(5) S. J. HiCKSON & Helen M. England. — The Stylasterina of 



the Siboga Expedition. 1905. 



(6) E. VON Mabenzeller. — Madreporaria and Hydrocorallia. 



Resultats du Yoyage du S.Y. ' Belgica.' 1903. 



(7) E. VON Marenzeller. — Stein- und Hydro-Korallen. Ball. 



Mns. Comp. Zool. xliii. 2. 1904. 



(8) H. N. MosBLEY.— Zoological Collections of H.M.S. ' Chal- 



lenger,' vol. ii. 1881, p. 5Qseq. 



(9) L. F. DE Pourtales. — Deep Sea Corals. Illustrated Cata- 



logue Museum Comp. Zoology, Harvai-d, 1871. 

 (10) S. 0. Ridley.— Zoological Collections of H.M.S. ' Alert.' 

 Proc. Zool. Soc. 1881, p. 105. 



EXPLANATION OF THE PLATES. 



PiATE XCIV. 



Fig. 1. JErrina [Lahiopora) nova selandia (facies Benhami) ; a portion of a branch 

 showing the grooved spines arranged in chistevs or with the grooves 

 turned away from the apex. X 4^ diam. 



Fig. 2. Another pliotograph of the same facies (Benhami) showing a number of 

 closely packed anastomosing branches. In this view it will be seen that 

 although tbe greater number of the grooves are turned away from the 

 apex of the branches (the top of the photograph), in places where they are 

 clustered they are turned in all directions. X 4'7o diam. 



Fig. 3. The same species (facies Kamosa). The grooved spines are not so crowded 

 and rarely form clusters. Nearly all the grooves are turned away from 

 the apex. X 9"3 diam. 



Fig. 4. The same species (facies Dendyi). The grooved spines are still more scattered 

 and nearly all the grooves are turned away from the apex, in this 

 photograph several gasteropores can be seen. X 9'3 diam. 



Plate XCV. 



Fig. 5. JErrina (Labiopora) novce selandice (facies Cooki.) In this facies man.y of 



the spines are in clusters, consequently the grooves appear to be turned 



in all directions. X ^a diam. 

 Pig. 6. TSrrina {Labiopora) aspera. In this specimen the spines are rather 



water-worn, but frequently occur in clusters and the grooves point in all 



directions. X 4| diam. 

 Fig. 7. JSrrina {Labiopora) capensis. The spines are very short and the grooves 



all point away from the apex. In this photograph the style can be seen 



in many of the gasteropores. X 4J diam. 

 Fig. 8. Errina {Spinipora) echinata. In this species, as in the JSrrina group of 



species, the grooves are turned towards the apex. X 4^ diam. 



Plate XCVI, 



Fig. 9. Errina {Labiopora) novae zelanclice (facies Ramosa). Slightly enlarged, 



showing the profuse ramification without anastomoses, and branches 



terminating in delicate points. Drawn by Prof. Eenliam. 

 Fig. 10. JErrina {Labiopora) novcB selandice (facies Cooki). Slightlj^ enlarged, 



showing the method of ramification and branches terminating in blunt 



points. Drawn by Prof. Benham. 

 Fig. 11. A terminal branch of the same species (facies Cooki), showing the dactylo- 



pores (D) protected bj' the grooved spines and the gasteropores (G). 



X 6 diam. Drawn by Prof. Benham. 

 Fig. 12. A portion of a larger branch of the same species (facies Cooki), showing the 



grooved spines in clusters, X ca. 6 diam. Drawn by Prof. Benham. 



