REPORT ON THE ALCYONARIA. xli 



3. Dasyyorgia,Y erriW, Bull. Mus. Corap. Zool., vol. xi. No. 1, p. 21, 1883. 



The colony is branched, and consists of a main axis and of spi rally disposed branches, 

 which are branched after the manner of a helicoid cytne. The polyps are thick and 

 distended at their bases. The spicules are scale-like, usually smooth, or slightly dentate 

 at their margins. 



4. Cftrysogoryia, Duchassaing and Michelotti, Mem. Cor. dcs Antilles, p. 21, ]il. iv. 



figs. 5, 6 ; emoul. Verrill, Bull. Mus. Comp. Zobl., vol. xi. No. 1, p. 21. 



The branching of the colony as in the preceding genus. The polyps are narrowed 

 at their bases, and covered with rather long spiny spicules, which are at the base of the 

 pol}^s placed more or less transversely. The spicules of the ccenenchyma are long 

 warty spindles. 



5. He7'oj)/iila {in manuscript, Hcro2)hile,Jide Liitken) ; Steeiistrup. Oversigt. K. D. 



Vid. Selsk. ForhandL, 1860, pp. 126-133. 



Biisea, Ducli. and Mich., loc. cif., p. 18, pi. L\i. tigs. 1, 2, 3, 1861. 



The colony is branched. The potyps are club-shaped and arise near the ends of thf 

 short twigs, beyond which a short, blunt stolon projects. The tentacles bend completely 

 inwards. The spicules are .small, warty spindles. 



Family VI. I s I D ^. 



Isidinse (pars), Milne-Edwards, Hist. Nat. des Coralliaires, vol. i. p. l'J2. 



Mopgeaclae, Acanellarlx, Keratoisids, and Lndx, Gray, Cat. -Lithopliytes IJrit. Mus., 



pp. 13, 16-19. 

 Isidx (jxuv), Studer, Monutsber. d. k. preuss. Akad. d. Wiss. Berlin, 1878, p. 661. 

 Isidinse et Mclitlnraceie, K(illiker, Icones histiologica?, jit. ii. pp. 140-142. 



In this family we include all the Holaxonia in which the axis consists of alternating 

 horny and calcareous portions. The horny joints (nodes) are composed of a connective- 

 tissue, which is irregularly calcified in delicate threads. The calcareous material is 

 amorphous. The ccBuenchyma, the polyps, and the spicules vary much in the different 

 genera. Three subfamilies may be distinguished. The first, that of the Ceratoisidinse, 

 seems closely related to the Strophogorginje. The polyps are relatively large, and 

 either imperfectly or non-retractile ; they rise from a thin ccenenchyma. The spiiules 

 are for the most part smooth needles, which extend on into the tentacles. In the second 

 subfamily, the ^Mopseinse, the polyps are club-shaped, and the tentacles when at rr.-t are 



