THK SKKTULAKIDJi. 



.Si i-iii/Hi-iii fnlfiiln <>KEX, Allfrenieinc Xatnr>.'cscliichie, lx:;.">. p. 7'.'. 



/'liii/iii/ni-iii fiilniln LA.MAKCK, Mist. mil. des :uiini. -ans Vert., I'd ed.. II. |s:!il, p. Hii 



PlumularwfalcataCovcR, Comisb Fauna, 111, ix:;s. \<. :;o. 



riiiniiiliirin jii/mlii HAS,- u.i. , Ann. ami Ma;;., VI, Isj], p. Hid. 



I'/iiiiniliii-iii Jnli-'il'i MAC ciiu.iviiAY, Ann. ami Ma-;.. IX, 1X4L', p. -Hi-t. 



r/llilllilili 'ill J'llli-illil IIVXDMAN, Allll. alld Ma;.'.. X. 1X4-'. I'. -'" 



Si-rliiliiriii ( I'/iininliiriii I fiili-utn Itu.YKii. Kaivatid Remarkable Animals ot Scotland, 1X17, p. I7li. 



I'/iiiiuiltiriii j'nlnilii .JoFix.vrox, British Xoophytes, I'd cil., 1x47, p. lid. 



I'liniiiiliifiii f'l/aitti STIMI'SOX, Marine Invert. <irand Manan, lx.">4. p. x. 



Plumularia falcata I'M KAI;I>, Canadian Naturalist, Dec., Ixii.'!, ]i. 4. 



.s'. liii/ni-iii ill/ruin A. Aii\s*i/, North Ameriean Acalepli;c, lsr,,">, |>. 141. 



I'/iiiiiii/iiriii fnli'iilii v\x IIKXKDKX, l''anna litturale de l!i>l<_'iiiue. ixild, p. |X7. 



1/i/ilruHiiiiiiiiii l'<ilr<itn HIM KS, British Ilydmid Xnophytes, ISlix, p. i'7.'i. 



ffydrallmcmia falcata VEKHII.I., Invert. Vineyard Sound, 1X71-7L', p. 40x. 



lli/i!i-iilliiiiiiii<ijiilnil,i(',. (>. Svio, Ilidrai: til Kiiiidskaln-n, 1X7:;, p. is. 



Hydrallmania falcata VEKHII.I., I'roc. Am. Asti. Adv. Sri., 1x7:;, p. :;ii4. 



llil'li-iilliinniiii fiili-iilii Sc'Hi'i.XK, Nonl^ee l-]xped., 1X74, p. 1:11'. 



Ifilili-iil/niiiiilii fnli'iitii McIxTcxii, Ann. ami Ma>:., 4th Ser., XIII, 1X74, p. L'14. 



Hydrallmania falcata VEKHII.I.. Amer. .loiirn. Sri. and Arts, VII, 1x74, p. 44. 



Ili/ili-iit/miiiiiii j'li/i-itlti \VI\TIIKH, Naturhist. Tid-skrift., 1XXO, p. L'.">1. 



Ili/ilni/liiiiiiiiii jn/i-'ilii r.EHiiii. ( ioplepolyper 1'ra Kara Havel, IXX7, p. :;:17. 



ffi/ilriil/iiiiiiiin fn/riilii DKKIWII, Tektonische Stndien, ixllll, p. L'Olt. 



Hydrallmania falcata MARETANKER-TUKNERETSCHER, Hydroiileii des k. k. natnrliist. HHI'IIIIIM-IIIMJ-, ISIKI, p. i':;."i. 



ITiiilnil/iiiiiniii fn/nilii I.KVINSKX, Vid. t'dli. "Haiiehs.", Tou'ter, IX'i:;, p. :;x7. 



Hydrallmania falcala ( 'IMHTIPKN, Ann. and Mau'. , (>lh ser., X\'l. ls<r>, p. I'til. 



Ifi/ili-nlli iniiiiii j'nli'iilii IlAKTL.M'H, llydriniii'diisi'ii Ilel^nhiiuls, IX'.C, p. 4"il. 



lfil<li-ii//iii<iiiiii jit/ruin BOXXEVIK, Norwegian North Atlantic Kxped.. IS'.Kt, p. xs. 



Ilililnil/iii'iuiiif'ilriiln Xrrnxc, Ilydr.ii.ls of the Woods Hole Region. IlllH, p. :iiil. 



Ifi/ili-iil/iniiiiiii f'lli-nln IlAUiiriT, American Naturalist, I'.Mll, p. '.'M'2. 



Ifiiilriil/iiiiiiiiii Julmln IlAHTi.Arn, 1 1 yd HiiiU'ii ans dt-iii Sti lien ( leean . 11MI1, p. :!.V>. 



Ifiiili-ii/liiiiiiiin fiilfiitii WHITBAVKS, Marine Invert. Ivistern Canada, liilll, p. -7. 



Hydrallmania falcata S.KMIXDSSOX, Hid raj; islandske Hyilroidi-r, IIMH 1 , p. i;:;. 



lfililr<il/i>Kiiiin fiili-iitii TOHUKY, Hydroida of the I'ai'itic- Coast, 1!M)L', ]>. 1:!. 



Trn]>/int!i>i/ii . Colony when typically developed :ixsiimino an exceedingly graceful panicled 



form, iitid attaining :i ln-iylit of a foot of more. Main stun not faxrirlrd. ,-])irally twisted, desti- 

 tute of hydrothecsB, divided into irregular internodes, the tendency being to bear a branch to 



eaeli interiiode, hut there is an occasional intermediate internode. Brandies arranged in a more 

 or less regular spiral, and themselves jfiviny; forth reyularly alternate liranchlets \vhich occupy 

 two planes which meet the branch at nearly a ri'ht anyle. Briinelies and liranchletx hearing 

 hy<lrothecie an<l divided into rather irregular internodes. each of which bears a number of 

 hydrothecie. 1 lydrothecie tubular, arranged in yronps on front of branches and branch] ets, their 

 bases in line, their distal portionx bending ^racefnlly to the riylit and left alternately, as viewerl 

 from above, the top of one reaching above the middle of the next one above, directed upward 

 and forward a> viewed from the side. Aperture oval or lunate, the side of martrin nearest stem 

 beiny flattened; opevculum consisting of a single tlap. 



fr'iiiiiixiiiii,-. -(Joiiiiiiiria borne usually on distal parts of branches and proximal parts of 

 brauchlets, ovate, with several indistinct longitudinal lines or ribs, ending in a short tubular neck 

 and round aperture. 



/)ixf filiation. - N'erv abundant in rather .shallow water on New Knj/land coast: Labrador 

 (Packard); (trand Manan (Stimpson); British coasts (Allman); Belgium (van Beneden); Nor- 

 way (Sars); ILdyoland (llartlaub); Polar Sea (Bergh) ; Iceland iSa'inundsson); Denmark ( Winther). 



Although usually found in shallow water, this .species was found at a depth of 1,101) fathoms 

 by the Norwegian North Atlantic Kxpedition (Bonnevie). 



