HYDROCORALLIXE GENUS EKRINA. 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 Marenzeller. — Madreporaria and Hydrocorallia. 



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



(7) E. VON Marenzeller.— Stein- und Hydro-KoraDen. Bull. 



Mus. Comp. Zool. xliii. 2. 1904. 



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



lenger,' vol. ii. 1881, p. SOseg'. 



(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. 



Plate XCIV. 



Fig. 1. T^rrina {Lahiopora) nova zelandicB {ia,c\es^en\\&m\) ; a portion of a branch 

 showing the grooved spines arranged in clusters or with the grooves 

 turned away from the apex. X 'H diam. 



Fig. 2. Another photograph of the same facies (Benhami) showing a number o£ 

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

 although the 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 i"75 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'o diam. 



Plate XCV. 



Fig. 5. lErrina (Labiopora) nova zelandice (facies Cooki.) In this facies many of 



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



in all directions. X 4>\ diam. 

 Fig. 6. Erriiia {Labiopora} aspera. In this specimen the spines are rather 



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



directions. X 4|- diam. 

 Fig. 7. Mrrina {Lahiopora) capensis. The spines are very short and the grooves 



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



in many of the gasteropores. X ^k diam. 

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



species, the grooves are turned towards the apex. X ^2 diam. 



Plate XCVI. 



Fig. 9. JSrfina {Labiopora) novce zelandice (facies Ramosa). Slightly enlarged, 



showing the profuse ramification without anastomoses, and branches 



terminating in delicate points. Drawn by Prof. Benham. 

 Fig. 10. Errina {Labiopora) novce zelandice (facies Cooki). Slightly 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 by 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 iu clusters. X ca. 6 diam. Drawn by Prof. Benham. 



