THE 3EKTUL ARIOSE. 85 



especially in the mutter of tin- marginal teeth and the size of the aperture, specimens agreeing 

 with all of the figures given by Alhilan and Ilartlauh being found in a single colony. The thick- 

 ness of the perisarc described by Ilartlauli is eharaderistic of his specimens of X. ,//;/,//,//,-,/ 

 ( = ,s. iuiil,ifi_,'iilix Allman) is not mentioned by Allman and is not apparent in the specimens 

 collected by the Allmti-nxx. It is possible that \. init,n;-tifii is not the same as .v. unilateralis 

 Allman, hut a distinct species. Ilartlaub claims that the; name -V- rtnl<n;ll<i miUut, rul/x Allman 

 (1ST'.>) must be. abandoned. The facts appear to be that Ilartlaub (Revision p. 4'J) changes the 

 name. X rfuliu'ii.i mii'liif, i-iilix Lanmuroiix (isii-(-)to &-rt nl<ir,Utt unilateralis (Lamouroux), thus 

 securing the priority of the name for Lamouroux's speeies, by a strict application of the A. ( ). V. 

 Code. It therefore became necessary to give new names to Sertularella unilateralis Allman and 

 S, riiilur!,! iiiillut, ml!* Allman. species which seem to the present writer identical. 

 ////"- -In South Kensington .Museum. London. 



SERTULARELLA CONTORTA Kirchenpauer. 

 I I'lal.- XVI II, li-s. 7-9.) 



.s, / tiiliiri'llii rniitniin KIRCHENPAUER, Nordische Gattungen, issi, p. L'H. 



.s ' iiii/iii-i'l/ii />ri'ti'i-iii HAKTI.AI-H, Revision der SertularellarArten, I'.MKI, p. 7'.i. 



N i iiiliin-llii riiiiiiirin II.vnTi.AUi, Ki'visicin der Sertularella- Arten, HKIII, p. s:;. 



Ti'iijilinxdiii, . Colony attaining a height of about :! inches in type specimen. Stem not 

 fascicled, thick, di\ ided into fairly regular internodes each of which bears a branch and hydro- 

 theca, or a hydrotbeca alone; internodes much broadened at their distal ends by a shoulder for 

 the support of the hydrotheca; nodes deep and distinct, there beiny corrugations or constrictions 

 in addition to the reyular nodes u'iyiiiL;' a twisted ap[ieai'ance to the stem and branches. Branches 

 irregularly alternate, flex uose, their bases \\\\\\ seyeral annular constrictions, divided into regular 

 internodes resemblini;- those of the stem. Hydrothee;e beayy. thick in texture, distal half free 

 and curyiiiif outward, margin with a distinct thickeneil rim and four teeth, the two abcauline 

 ones usually beiny' more pronounced than the adcauline ones. Operculum not seen in specimen 

 described, although Ilartlanb tigures a four-flapped operculum. 



Gonosome.Gonaaigia large, axillary, ohovate or obconical in outline, or tereto as in the 

 type, with a short neck shaped like the frustum of a cone, and two prominent teeth in the speci- 

 men tiu-ured. without teeth in the one figured by the original describe!-; strongly annulated 

 throughout in the specimen figured, but smooth in the middle portion as figured l>v Kirchenpauer. 



Distribution. Falkland Island and the Straits La Mar re. (Kirchenpauer). 



The description given above is made, mainly from a specimen kindly sent me by Professor 

 Levinsen. labeled " Lamarre Straits." the locality from which the type specimen was secured. 

 In the trophosome it agrees well with the original description and figure given by Kirchenpauer, 

 but the gonangia are quite different, although there is one gonangium that is much nearer the 

 type than the one figured in this work. The specimen agrees very well with A'. /ini/,,-f,i Ilartlaub, 

 which I therefore regard as a synonym. 



Tt/]i< . -In the Museum of Leipsic? 



SERTULARELLA LATA (Bale). 

 (I Mate XVIII, fitf. 10.) 



'I'niiiiiriii lutn Bu.n, .Tciuni. Mirrosr. Sen'.. Victm-ia. 1 SSL', p. 14. 

 Tlniinriii lulu I'.M.I:. (';it. Ausl ralian llyilnild /m ipli\ Irs, 1SS-I. p. 12(1. 

 Tlini,n-i,i hi/n/ii 1,1 Ai. I.MAN, Cliallc-nu'er Kcporl, IIyilri.iil:i, 1't. _'. Isss, p. C9. 



7'ni/i/KtMiiii' . Colony attaining a height of ii or s inches (Bale). Stem fascicled below, not 

 fascicled above, where it is thick, divided into regular internodes each of which bears a branch 

 and two hydrothecffl on one side and a single hydrotheca on the other. Whole hydrocaulus 

 remarkably translucent and hyaline in structure. Blanches alternate, distant, only slightly con- 

 stricted at their origin, divided into regular, rsually long internodes. Hydrotheca' alternate, 

 widely separated by the thickness of the stem, closely approximated, tubular, completely adnate 

 to aperture on adcauline side, not apparently swollen or gibbous below, margin with a delicate 



