284 " ENDEAVOUR " SCIENTIFIC RESULTS. 



Sertularella gayi, Hincks, Brit. Hydr. Zooph., 1868, pp. 

 237, 238, fig. 29, pi. 46, fig. 2. Id., Verrill, Amer. 

 Jour. Sci. and Arts, (3), v., 1873, pp. 9, 14. Id., 

 Allman, Trans. Zool. Soc., viii., 1874, pp. 471, 474, 

 pi. Ixvi., fig. 3, 3a (var. robusta) ; Id., Allman, Mem. 

 Mus. Comp. Zool. Harvard, v., 1877, p. 22, pi. xv., 

 figs. 3-5 (var. robusta). Id., Sars, Bidr. til Kunds. om 

 Norg. Hydr., 1874, p. 109. Id., Kirchenpauer, Abh. 

 Nat. Ver. Hamb., viii., 1884, p. 41. Id., Hartlaub, Abh. 

 Nat. Ver. Hamb., xvi., 1900, p. 61. Id., Nutting, 

 American Hydroids, pt. II., Sertularida?, 1904, 

 p. 78, pi. xiv., figs. 1-7. Id., Billard, Exp. Sci. du 

 " Travailleur " et du " Talisman," Hydroides, viii., 

 1906, p. 184, fig. 9, p. 185 (var. robusta and var. 

 elongata). Id., Jaderholm, Kungl. svenska Vetenskap- 

 sakad. Handl., 45, 1909, p. 100, pi. xi., fig. 13. 



Sertularia ericoides var., Pallas, Elench., 1766, p. 127. 



Sertularia polyzonias var. ft, Johnston, Brit. Zooph., 2nd 

 ed., 1847, p. 61, pi. x., fig. 2. 



Sertularella annulata, Allman, Rep. Sci. Results ; ' Chal- 

 lenger " Exped., Zool., xxiii., Hydroida, pt. II., 1888, 

 p. 52, pi. xxiv., fig. 2, 2a. Id., Hartlaub, Abh. Nat. 

 Ver. Hamb., xvi., 1900, p. 54. 



Sertularella Gayi (Lamouroux), var. Allmani, Billard, Ann. 

 Sci. Nat., Zool., (9), xi., 1910, p. 10, fig. 3. 



The hydrothecse are large and nearly smooth, with very 

 inconspicuous teeth ; the gonothecae with the annulations 

 irregular, often almost wanting, and usually with three short 

 teeth on the summit. 



Loc. Eastern slope, Bass Strait, 80-300 fathoms. 



SERTULARELLA UNDULATA, sp. nov. 

 (Plate xlvi., fig. 1.) 



Hydrocaulus unbranched, about ^ inch in height, divided 

 by oblique twisted joints into internodes of very variable 

 length, each supporting a hydrotheca at the summit and 

 having its lower portion strongly undulated. 



Hydrothecse short, stout, free for half their length or 

 more, proximal half smooth, distal half with a strong annular 

 ridge or shoulder, above which the hydrotheca is somewhat 

 narrower, and a second slighter annulation close to the wide 

 aperture, border square, with four small teeth, between 

 which are shallow emarginations ; no internal teeth. 



Gonosome. ? 



