REPORT ON THE ALCYONARIA. xli 



3. Dasi/(jor<jia,Yem]\, Bull. Mus. Comp. Zool., vol. xi. Xo. 1, p. 21, 1883. 



The colony is branched, and consi.sts of a main axis and of spirally disposed branches, 

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

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

 at their margins. 



4. C/n-ysogoiyia, Duchassaiug and Michelotti, Mem. Cor. des Antilles, p. 21, pi. iv. 



figs. 5, 6 ; emend. Verrill, Bull. Mus. Comp. Zool., 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 

 pol5rps placed more or less transversely. The spicules of the coenenchyma are long 

 warty spindles. 



5. Hero2^/iila {hi manuscriTpt, Herophile,Jide Liitken) ; Steenstrup, Oversigt. K. D. 



Vid. Selsk. Forhandl., 1860, jip. 126-133. 



RiistM, Diich. and !Mich., loc. cit., p. 18, pi. Ixi. tigs. 1, 2, 3, 1861. 



The colony is Ijranched. The poly[)s are club-shaped and arise near tlif ends of the 

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

 inwards. The spicules ai-e small, warty spindles. 



Family VI. I s i D ^. 



Isidina: (pars), Milne- Ivl wards. Hist. Nat. des Coralliaives, vol. i. p. 192. 



Mopseadx, Acanellaihe, Keratoisidie, ami Isidee, Gray, Cat. Lithopliytes I'lit. llu?., 



pp. 13, 16-19. 

 Isidx (jx.u-s), Studor, i^Ionitsber. d. k. preuss. Akad. d. Wiss. Berlin, 1878, p. 661. 

 Ixidmx et Mdithxacex, Kolliker, Icones histiologicfe, pt. ii. pp. H(i-142. 



In thi.s 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 i.- 

 amorphous. The coenenchyma, 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 Strophogorgina;. The polyps are relatively large, ami 

 either imperfectly or non-retractile ; they rise from a thin coenenchyma. The spicules 

 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 iv.-t ari^- 



