252 THE VOYAGE OF H.M.S. CHALLENGEK. 



Family IV. X E N i i d .E. 



JCenidx, Verrill, Proc. Essex Inst., vol. iv. p. 148. 



Xeninit, EliroDberg, Die Coialk'ntliiurr dus rothcn Mocrus (Reprint, p. 53). 



Alcyonhia: exsertx, Klunzinger, Die Koralltliiere des rothen Mccros. p. 30. 



Genus Xenia. Saviguy. 



Xenia elongata, Dana. 



Xenia eloiujata, Dana, Zoophytes, p. 606, pi. Ivii, lis. •''. 



Dana describes thi.s species, of which the hahitat was unknown, as of a brownish 

 colour; the only species in the Challenger collection was, when first examined, of a pale 

 blue tint, which has bleached to a nearly perfect white in the .spirit. It seems, however, 

 to approach very closely to Dana's species, and as such we venture to record it. 



Habitat . — Amboina ; shallow water. 



Family V. T u B i p u u i d .i;. 



Tubiporida, Verrill, Proc. Essex Inst., vol. iv. p. 148. 



Tuhiporina, Ehrenbeig, Die Corall. des rothen Meeres (Keprint, p. 5S). 



Tithijiorinse, Milne-Edwards, Hist. Nat. des Coralliairts, t. i. p. 130. 



Genus Txhipora, Liiineus. 



Tithipora mnsica, Linneus. 



Some fragments of this .species, which is not uncommon in the sliallow waters of the 

 tropical seas, were met with in some coral debris from Samboangan. 



This .species was also found at Santa Cruz, ]\laj(jr Island, opposite Samboangan ; 

 Hving specimens were dredged from a depth of 10 fathoms; the beach was covered with 

 '■ cart-loads of the dead and dried coral.'' ' 



Family VI. C o R x r i. a h i d.v.. 



Coniiilari'hr, Dana, Zoophytes, p. 6:2". 



,. Kulliker, Icon. Histiol., pt. ii. p. 13. 



Cornnlarinx et Telf^tinx, Milne-Edwards, Hi.-t. Nat. des Coralliaires, pp. 104. 112. 

 Cornuhiri<he, Verrill, Proc. Essex Inst., vol. iv. p. 148. 

 Cornularlns:, Klunzinger, Die Koralltbit-re des rothen Meeres, p. 42. 

 Cornularidii, v. Koch, .'^ki let d. Alcyou.irien, Mnrpli. Jalirlj., Bd. iv. p. 474. 



Within this family, as defined by tlie authors above quoted, wc include those }'olyp 

 colonics in which the individuals are united either by stolons or by a basal membrane, 

 so as to f Tin iricrustatinns over foreign objects ; or in whicli they ilevelo]i into bush-like 



' N'arr. CLall. Exp., vol. i. p. i.i'.i. 



