50 PRIMNOAD^. 



155. Primnoella Australasias. B.M. 



Coral elongate, cylindrical, simple, unbranched, rather tapering ; 

 cells numerous, placed in close regular circles round the stem, each 

 formed of two series of imbricate scales. 



Primnoa Australasias, Gray, P. Z. S. 1849, p. 146, t. 2. f. 8, 9 ; Ann. 



Sf Mag. Nat. Hist. 1850, p. 510. 

 Primnoella Australasia, Gray, P. Z. S. 1857, p. 286 j 1859, p. 483. 



Hob. Australasian seas, on oyster-shells and stones. 



Virgularia australis, Lamk. A. s. V. ed. 2. ii. p. 648 ; Ehrerib. Corall. 



r. M. p. 35, t. 3 j Herklots, Not. p. 13. 

 Sagitta marina alba, Rumph. Mm. p. 34. n. 1 j Amb. vi. p. 256 j Seba, 



Thes. iii. t. 114. f. 2. 



Seba represents this species as fixed to a stone. If this is the case, 

 it must be Primnoella Australasia?, the axis of which exactly fits this 

 description: 



Axis cylindrical, subulate, very long, white, stout, truncated at 

 the thickest end ; the fracture radiately striated. 



156. Primnoella vetusta. 



Leiopathes vetusta, Michel. 



Juncella vetusta, Kolliker, Ic. Hist. p. 176, t. 14. f. 12. 



Primnoa vetusta, Kolliker, Ic. Hist. p. 176, t. 14. f. 9. 



Hob. ? 



t Polype-cells sunken, even with the surface of the bark. 



78. DICHOTELLA. 



Coral cylindrical, tapering, branched ; branches dichotomus, di- 

 verging. Bark moderately thick, granular, friable, brown. Polype- 

 cells small, oblong, not elevated, in several longitudinal series on the 

 edges of the branches in a quincunx, each placed in the middle of 

 the upper margin of a white irregular- shaped scale ; lateral lines 

 very indistinct. Axis cylindrical, tapering, deeply longitudinally 

 striated, hard, stony, calcareous, dark grey, tapering to a very fine 

 point. 



157. Dichotella divergens. B.M. 

 Branches dichotomous, cylindrical. 



Hal. ? 



In a bad state, with the greater part of the bark lost, and only 

 showing the polype-cells in two or three small spaces. 



E. Polype-cells short, cylindrical, ascending, on each side of the axis. 

 79. BEBRYCE. 



The coral is slender, cylindrical, elongate, furcately branched, with 

 short, ascending, subcylindrical polype-cells, alternately on the sides 

 of the stem and branches ; polype-cells with eight valves. 



