84 AMERICAN HYDROIDS. 



fSertiiln,;/!,, angulosa BALE, Proc. Royal Sot-. New Soutli Wales, 1893, p. 102. 



Xi'l-tiiliir,l/H I, infill ('l(AWKl)Rn, Allll. and Mag., Mil SIT., XVI, ISH'l, p. 261. 



S,rlnl,ii;llii I* ii,llii I.OXXEVIE, Norwegian North Atl. Kxped., isyil, p. 77. 

 \, riiiim; I/a I: in /In HAKTLAI'B, Revision iler Sertularella-Arten, I'.iUO, p. 63. 

 Si,-l,il,ir,ll,i limlli II AKTi.Ai-ii, Ilyc.lroiileii ails dem Stillem Ocean, 1901, ]>. .'154. 

 .s,, //,,//,/ t,,,,-llu TORREY, Hydroidu of tin- Pacific Coast, 1902, p. 64. 



TriijiJniKinii, . Colony small, not reaching a height of more than one-half inch in specimens 

 examined. Main stem slender, strongly geniculate, divided into regular long internodes, each of 

 which bears a hydrotheca. Branches. if present, few. lik(> the main stem, divided into regular 

 internodes, each bearing a hydrotheca. Hydrotheca distant, fusiform, strongly rugose, almost 

 their whole length exserted. aperture square, mounted on a short quadrate collar which has four 

 equal and equidistant teeth: opereulum with four Haps. 



Giiiin.-iiiiii: . "Gonangia ovate, slender, ringed transversely, produced above into a short 

 tubular oritice." l 



D'lxii'ilmti,,,,. Albatross Station -2W>. lat. N. i>:;- In' :W. long. W. xi' ; 19' li>". 109 fathoms; 

 Att>atrxx Station 2865, lat. N. 4,s li'', long. W. 12"2 49', 4u fathoms; Puget Sound (Hartlaub); 

 California, (Torrey); Rio de Janeiro (Rathbun); British Coasts (Hincks); Norwegian Coa.-t 

 (Bonnevie); Greenland (Levinsen). If N. tini/idumi Bale is a synonym of $. /,//<//</, the range of 

 the species will have to be extended to Australia. 



1 cannot agree with Hartlaub that ,S. genicvlata Hincks- and X. ////<w/, mi von Lendenfeld 3 

 are synonyms of this species. Specimens dredged by the U. S. Fish Commission steamer 

 Alliutroxx and off the Alaskan coast are quite typical. as are the fragments collected by Doctor 

 Richard Rathbun off Rio de .Janeiro. 



Type. In Museum of the Natural History Society. Newcastle-upon-Tyne, England. 



SERTULARELLA ALLMANI Hartlaub. 

 (Plate XVIII, figs. 3-6.) 



Kertulurelta unilat, rnlis ALLMAX, Ann. and Mas., 4th ser., XVII, 1876, p. 114. 



Sfrl/iliii-,'1/,1 iniiliili-rnlis Ai, I.MAX. Phil. Trans. Royal Society, London, V, 1S79, p. 282. 



Vtrtuliiriii Ki-riniilit AI.I.MAX, Challenger Keport, The Ilydroids, Pt. 2, 1888, pi. xxv, fig. 2. (Explanation of plate.) 



Sfi-liiliii-in iiniliilfi-nllit ALLMAX, Challenger Report, The Ilydroids, Pt. 2, 1888, p. 53. 



X rtiiliirfllti iil/iiiinii IlARTLAfB Revision der Sertularelhi-Arten, 190(1, p. si. 



HARTLAUB, Revision der Sertularella-Arten, 1900, p. 82. 



Tropkosome.Colouy attaining a height of about one-half inch, growing in a dense tuft. 

 Stem slender, much annulated below, divided into fairly regular internodes by deep nodes. 

 Branches alternate, dividing several times into branchlets, the ultimate division being dichoto- 

 inous, lying in two planes, projecting forward, outward, and upward from the stem, divided into 

 regular internodes, each of which usually bears a hydrotheca, or a hydrotheca with a branchlet 

 borne at the >ide of its base. Hydrotheca- lying in two planes projecting forward, outward, and 

 upward, so that they appear in side view to be all inserted on one side of the branch. Hence the 

 name " uniliit, ,///''*." Hydrotheca' flask shaped, rather small, about the distal one-half of adcau- 

 line wall free, aperture quadrate, margin with four conspicuous slender sharply-pointed teeth, 

 the anterior pair being the longer, and a narrow, even border. Opereulum of four flaps. 



(tiitiiixni,,, . ( ionangia rather large, ovoid toobconical, annulated on upper half and sometimes 

 throughout, aperture rather large, and margin with five or six blunt teeth. Acrocysts present 

 when >exual products are mature. 



I>!x1r!lnit!<>ii Ott' Accessible Bay. and Swains Bay. Kerguelen Island (Allman); Tierra del 

 Fuego, Point Stanley (Ilartlaub): Straits of .Magellan (Hartlaub); AH>utt'<ixx Station ~2ll(\. Straits 

 of Magellan. 



This is a very variable species, and the quite considerable amount of material collected by 

 the United States Fish Commission Steamer A/lmfi-uxx in the Straits of Magellan shows the 

 identity of the -pecies named in the synonymy above. The gonangia are particularly variable, 



'Him-ks, I'.ritish Hydroid Zoophytes, 1868, p. 1MJ. 



2 Annals and Magazine of Natural History. 4th ser., XIII, 1874, p. 152. 



9 Proceedings of the Linn.-i-an Society of New South Wales, IX, 1SS4, p. 416. 



