54 AMEKICAN HYDROIDS. 



SERTULARIA CHALLENGERI, new name. 



(Plate II, ti-s. I-L'. ) 

 Desmoscyphiin jieclinntnx ALI.MAN, Challenger Report, The Hydroids, I't. '2, Isss, p. 71. 



Trap/Hifi/iiiii'. Colony attaining a height of about 2 indies. Stem thick, not fascicled, 

 slightly sinuous, divided into regular internodes, each of which boars, in the portion of the type 

 examined by me. two alternate branches and six hydrotheca?. Branches alternate, springing 

 from short processes of the stem, from which they are divided by two internodes, including a 

 short aonhydrothecate internode; thick, divided into irregular internodes with a tendency to a 

 regular arrangement of two hydrothecse to each. Hydrotheca' strictly opposite, borne on the 

 front of the branches, but seldom contingent', tubular, not noticeably swollen below, the distal 

 portion bending gently outward and ending in a bilabiate margin, and a two-valved operculum. 



Giiiiini: Unknown. 



Distribution. Off Bahia (Allman): off Moncceur Island, Bass .Strait, 38 K> fathoms (Allman). 



The above description is based on a portion of Allmatfs type kindly sent me by the South 

 Kensington Museum. The character that seems most marked is the nonhydrothecate internode 

 at the base of each branch. The portion of the specimen examined also had the peculiarity of 

 having two alternate branches to each internode. The, species is a typical S, rfnln/'tn in the sense 

 used in this work. The name S<<i'tnlri<i />< i-tin<tt<t being preoccupied, 1 1 herewith substitute that 

 of the famous vessel by which the type was collected. 



TI/JM: In the South Kensington Museum, London. Fragment in possession of the author. 



SERTULARIA OPERCULATA Linnaeus. 



(Plate II, iijrw. 3-5. ) 



Ftm lair ELLIS, Essay Nat. Hist. Corallines, 1755, ]>. 8. 



n/ii'i-rii/iilii LiXN.Kl's, Systema Xatlltte, 1 7">S, p. SI IS. 



iijun-iiliitii Hui'TTTYX, Xatuurlyke Historie, XVII. 17111-177:!. p. 531. 



iixiii-iiiili-x PALLAS, Elenchus Zoophytorum, 1766, p. 132. 



ii/ii-i-niliiUi LiNx.Ei's, Systema Xatune, 1767, p. 1307. 



i iimniiiil/'s BODDAERT, in Pallas, Lyst der Plant-Dieren, 170S, p. 164. 

 iliitii MARATTI, I>e Plantis Zoophytis, eti 1 ., 1770, p. 26. 

 li-a (iuiixovii s, Zoophylaciurn Gronovianuin, III, 1781, ]>. !ir>7. 



i <i/in-i-iiliit(i ELLIS and Scii, \NDKH. Xat. Hist. Xoopliytt-s, 17S(i, p. 39. 



i iixiii-ii'ulcx WiLKlNsand HKHBST, in Pallas, Charaktcristik di-r Tliicrpllanzpn, 17S7, p. 170. 



i ii/ii'ri-iilntii (i.\iELiN T , in Liiinj-iis, Systcnia N'atura', 13th ed., 17SS-179II, p. :!S44. 

 Ihiintiiiriiii n/H'ri-iiliiia ESI-ER, Die Pflanzenthiere in Abbildung., Ill, 1788-1830, p. 1H1. 

 S<-i-liil<ii-i<i (ii>ei-fiiliitn BERKENHOUT, Synopsis Nat. Hist. Great Britain, I, 17SH, ji. 21li. 

 Sertularia operculata Sn.uv, Vivarium Xaturae, etc'., 17Sii-lS13, pi. MVI. 

 Sniiiliiriii tijH'rriiliiln Esi'EK, Fortsetzungen der PHaiizenthieren, II, 1794-lSOfi, j>l. iv. 

 Sirlnliiria njn'i-riiliiln Bosc, Hist. Nat. des Yers, III, 1SIIL'. ]i. 91'. 

 Ki'i-iiilni-iii ii/M-iTitlntn TURTON, British Fauna, 1S07, ji. 1'lL'. 



Xi-rlii/tii'lu II/K ri-nliitn JAMESON, Catalogue of Animals of the ('lass Venues, 1811, p. 5(i4. 

 lii/iniiiii'iiii i,V;7/ii/-/ii) iii>i'rctilata LAMOUROUX, Nouv. Bullet, des Sc. ]iar la Sue. jihiloniaticjiie. 1S12. p. 184. 

 Nigettastrum usneoides OR-EK, Lehrbuch der Naturgeschichte, Pt. 3, isi.'i. ji. 9:;. 

 Xi'i-liil<ii-i<i <>/H'i-i-i//ii/n LAMARCK, Hist. Xat. des Aniin. sans Vert., II, ISlli, ji. lis. 

 Dynamena operculata LAMoruorx, Hist, des 1'olypiers, ISlli, p. 176. 

 Si'i'/ii/iii'in iijMi'rii/ii/n STEWART, Elements Xat. Hist. Animal Kiiif;., II, 1817, j>. 441. 

 Si'i-liiliii-i/i ii/ii-i'niliil/i ScinvEKiuEH, Handbueh der Xaturiresehiehle, etc.. ISl'O, p. 427. 

 I>i/iiiiiin : iiii n/Hiriilutii LAMOI liorx, Kxjiositioi] Methodicjue, ISl'l, ]>. 12. 

 Dyrtamena u/in-rululti FLEMIXU, British Animals, 1828, p. 544. 

 ,s< liii/iirin iiiu'rrii/iilii LAMARCK, Hist. Xat, des Anim. sans Vert.. 1S3H, ]>. 144. 

 fv'1-liilni-iii ii/u'i-i-iiliiln MACCIIM.IVRAY, Ann. and Mai;., IX, 1S42, p. 464. 

 lii/ii'iiui mi i,/i,i-i;i/,iln JOHNSTON, Hist. Brit, /oopli., 1S42, p. 77. 

 Ki'rlnltir!<i n/nrni/n/n ALDER, Cat. Zoojih. Xorthumb., 1S.">7, ]>. 2(1 

 Aiu/i/tixliftiii ii/inTiiliitit Aci.vssi/., L., ('out. Xat. Hist. I". S. , 1\', 1861', p. 355. 

 Iiiiiiiiiiii'ini n/iffculdln KIRCIIEXI-AI-ER, Xeue Sertulariden, 1S6M, ji. S. 

 Dynamena fasciculate KIKOIEXPAUER, Neue Sertulariden, 186:;, ]>. 12. 



1 Lamarck, Histoire Naturelle des Animaux sans Vertebres, ISlli, p. 140. 



