THE SEKTULAKIH.K. 93 



.Si -fliiliin ll'i /ni/1/.iiiiiiix AI.II:\, .Ilium. Marine Mini. Assor.. V, ISltli, |.. J.'i.". 



,Si i-lnliii-i H" /H>/I/ .'iiii'i.-: l.iiMitsin, .Ml. Sla. Neapel. XIII, 1S1I1I, |j. mil. 



Si rlii/iii-i'l/ii /i'>li/:< mi"* MI:TI:MOI KI, Tia\aiix Sial. /.mil. Wimerviix, N'll, IS'.Hl. |i. 10. 



Sertularetta polyzanias II SKTI.U K, \Vis.-. M.TIVHIHI.. III. lli'l^nlainl, Isim, p. ii.v 



SertulareUapolyzomas KAIHH:. Saniml. Kauk. Mus. Till!.-, isn'.i. 1 1. .M7. 



N i-liilnri-llii j>ii/ii:i>iii<t.i PK TI-:T ami Mi-;nm, I lyilrairvs ile I' I lir.nnlelle, IHOn, p. l"J. 



.s i-hiliiri'/ln j>iitii:ntii<i.i I IAKTI.U n, Revision Sertnlarella-Arten, limo, p. ss. 



N lin/iin-l/ii /in/i/:nniiix N'rmvc;, Ilyilrniils.il Wmi.ls ll.ili- lli^'i'm. I'.ml. p. :;iiL'. 



.Si T//<II ;//,i jiii/i/:iniiii!i Nr-m.NM, Ilyilrniils llarrinian Kxpt-il., I'.Hll, p. Is.:;. 



Sertularelta polyzonias \VIIITKAVKS, Cat. Marim- Invert. Kastern ('ana. la, llnil, p. -">. 



N. liiiliii'i'l/n /iit/ii:nniiix S.KMi'NJissn.v, Biilraj.'til Kundskaben islamlskc II yilmiili-r, IHHL', p. li~. 



Tn>j>/itixt>i/i>: Colony of exceedingly irrc^uhir yrowtli, attiiinin^; a liciylit of 4 or ."> inches. 

 Stem not fascicled, slender, tlcxuose, irreo-iilafly branched; nodes very distant and irregular. 

 Bl'anehes irregularlj alternate. Hexuose. themselves often lirancliinjj prol'n.sely. divided into 

 irregular internodes. the tendency hcinjf to have an internode to each hydrotheca. Hydrothecse 

 rather distant, stout: proximal portion somewhat swollen, about the distal half free and with 

 approximately parallel sides; aperture s<piare, maryin with four low equidistant teeth; operculum 

 of four flaps. 



<ion<iiini< . Gonangia ovate, with four conspicuous horn-like projections around tlie margin 

 and very deeply rugose throughout, those of the female beinjf much larger than those of the 

 male colonies. When the sexual elements are mature the jj-onanjj'ia are surmounted by globular 

 acroeysts. within which the o\ r a develop into planuhe. 



/)!xtril>iifiii. ( )ne of the most abundant and widely distributed of the hydroids. New 

 England coasts (Verrill), Hay of Fundy (Stimpson). (Julf of St. Lawrence (Dawson). Alaska 

 (Clark), Strait of Magellan (llartlaub), Chile (Hartlaub). (Jreenland (Levinsen). Norway (Sar>). 

 Denmark (Wintlier), Shetland (Norman), Iceland (Siemundsson), (Jreat Hrituin (Hineks). Helgo- 

 land (llartlaub). j\Iediterranean (Lo Bianco), Adriatic (Pieper), A/ores (Bedot), Australia (Bale). 

 'Capo of Good Hope (Johnston), Heil Sea ( Kiniienpauer). . l//W/v.v Station _'',(;'.(. hit. N. :-!l n 09', 

 on<f. W. Tit :;:;' 30", 3:3 fathoms; Station I'd'.Ui. lat. N. 4:. ('4'. lony. W. 55 C 23', 7'-' fathom.-,; 

 Station :!^'.I4. lat. N. 57 16' 4:.", loujj. W '. l.V.t n:;' 30", :'.o fathoms; Station 3505, lat. N. 57 nil'. 

 lon.U'. W. Itis 17', 44 fathoms; Station :;.M1, lat. N. :7 32', lony. \V. If.'.i 38', ".'.i fathoms. 



This species has fre(|tiently been mistaken for X. </"//''. It can be distinguished from that 

 species, however, by the fact that it lias a notifax-icled stem, a smooth hydrotheca, and stouter 

 gonangm which have four teeth instead of two. 



SERTULARELLA CLAUSA (Allman). 

 I'lal.- XXI, li.-. :;, -I.) 



Sertularia clauaa AI.I.MVN. Challenger report, llyilmiila. I't. L'. isss. p. :,i. 

 Ki'rliiliir, ll,i ,!,,, ixn llu;ri.ui:, llevisinii iler siTtiilarella-Arten, I'.MMI, p. nil. 



Tvophosome. Colony attaining 1 a height of about 1 inch. Stem nol fascicled, delicate. 

 sinuous, divided into regular internodes, each of which bears a hydrotheca. Branches irregular. 

 with a tendency to an alternate arrangement, themselves -.onietimes dichotomously brain-lied. 

 internodes sleniler and rather lony. 



Hydrothecse rather distant, swollen In-low, exserted. throughout their distal half, narrowing 

 gradually to the margin: margin with four very shallow teeth and with a strong four-flapped 

 operculum, which forms a low pyramid above the hydrothecal aperture. 



<;<iin>nni,,, . Not known. 



OwtfrifotfiOTi. -Off Montevideo, lat. S. :;7 17'. long. \Y. :,:; :\-i' . tioo fatlioms. 



The atiove description and the figures of this specie-, were taken from a part of Allman's type 

 specimen, kindly sent me b\- the authorities of the South Kensington Museum. The depth at 

 which this species was found is exceptional for the u'eiius. The verv strong operculum is a 

 feature that one would not expect to liud associated with such inconspicuous bydrothecal teeth. 



Tyj>e. In South Kensington .Museum, London. A fragment in the collection of the author. 



