THK SKRTPLARIM.K. 81 



SERTULARELLA TANNERI, new species. 

 I Plate XVI, !i'_'. I. I 



. - But a fragment ut' ;i single branch nl' this species is known. Branch sliyhtlv 

 flexuose. divided into regular internodes, each bearing a h\ drotheca. node-- oblique, deep, accom- 

 panied by two of three annular rugosities of (lie perisare. I Ivdrot hee;e very la rye. subtubular. 

 the terminal portion being gently curved out ward, only a small part of the proximal adcaiiline 

 wall being adnate to the hydiocaulus.; entire hydrothecal \\all Ixith aliove and lielow regularly 

 and closely annulated; margin squarish, with four low equidistant teeth and a four-flapped 

 operculum. 



(inniixnni, . Not known. 



Distribution. Albatross Station I'.sTM. lat. N. ^ 30', long. W. 1^4 :>7. 4o fathoms. 



This very striking species shows almost complete intergradation liet\\een the /</,/<</ and 

 polysonias groups, having the deep annulatioiis of the former with a hydrotheca - ....... what 



resembling the latter in si/c and shape. 



II . In the collection of the I'. S. National Museum. 



SERTULARELLA GENICULATA Hincks. 

 , Mat.- XVI, tin. 1'. I 



Sertularella geniculala MIS-CKS, Ann. ami Mu>;., 4th sur., XlII, ls"l, p. 152. 

 Sertularella geniculala KIHCHKM-.M I:K, Nonlischc < iaitiiiii.'i>ii, lss4, ji. 44. 



i i/i'itif/i/iitii LKVIXSEN, McdnsiT, ( 'tcnn|ihc.rc'r n^ Ilydrniilrr fra ( iri'inktiiils NYstkyst, ISli:;, ],. L'lll. 



onu .--- " Stem slender, decidedly yenicldate. simple or sliyhlly branched, jointed and 

 twisted above each caliele: the internodes lony, attenuated below and bent in opposite direction-.. 

 Hydrotheca 1 very distant, ribbed transversely, chiefly on the upper half, rather broad below, and 

 narrowing o-radually toward the margin, which bears four very prominent teeth, is sinuated 

 deeply between them, and is surrounded bv a conical quadripartite operculum." 



Gonosome. Unknown, 



/>/'x?/'/'/>n//'i>,i. Off Frederickshaab, Davis Strait (Ilincks); Jan Mayen (Loren/). 



I liave not si'en this species, and the above description is copied entire from the original bv 

 Ilincks. Hartlaub stoutly contends that this species is identical with .V. f<n</l<i. and lie mav 

 be right. Not having material for comparison, and in view of the yreat difference between 

 the description and illustrations of the species as given by Ilincks and the tvpica! .S. f,n,l/n. the 

 present writer deems it safer to regard the two species as distinct. 



SERTULARELLA PATAGONICA (d'Orbigny). 



(Plat i- XVI, ti>;. 3.) 

 Sertularia patagonica II'OKHKIXV Voyage ilans ]' Ani('Tii|iic Mi'-i-lilinnalc, IS.'!!I, p. L'. r ). 



Si rtiiiin-i'lin ri'H'ixn '.' Kim 'iiKM'M 'KK, Nordische Gattungen, iss4, \>. ti'. 

 Sirhi'ori 'Hi i ri<i/<tsu '.' 1 1 Men. MII, Revision der Sertularella- Arten, inon, \>. H'L'. 



" S. ramulia simplicibus, cellulis alternantibus, ovalibus, transversim rugoso-plicatis; \esi- 



culis magius, transversim 1<> costato-gradatis." (Original description.) 



Ti-i>]iliiix<niii'\ Colony unbranched, attaining a height of about 1 inch. Stem not fascicled, 

 internodes short, divided by oblique double nodes; hydrothecse oval, alternate, distal end trun- 

 cated, provided with six wrinkles in the form of strongly projecting tiers. 



(TIUIUKIIIIII'. Gonangia very large, resembling the liydrotheca-. oval, ornamented transversely 

 by ten ribs in tiers. 



/ttxfril'iitiiin. " Bai de Kos." southern Patagonia. 



I have not seen this species. Judging from the excellent figures given l>v d'( )rbi<_mv. it does 

 not seem likely that it is the same as X. rm/n.-oi, as suggested b\ Kirchenpauer and llartlaub. 

 the distal extremities of both hydrotheca- and goiiangia being entirely different. 



'Description libei-ally translatt-il fruni the original nmiv fxlfiiilnl ilcM-riptimi by il'( >rl>ii_ r ny. 



