16 '* ENDEAVOUR " SCIENTIFIC RESULTS. 



Sekti'i.ahia maplkstonki, Bale. 



Sertularia maplestonei, Bale, Cat. Austr. Hyd. Zooph., 1884, 

 p. 70, pi. vi., fig. 4, pi. xix., fig. 2; Marktanner-Turneretscher, 

 Ami. k.k. naturhist. Hofmuseums Wien, v., 1890, p. 231. 



(Not Thuiaria maplestonei, Billard, Arch. Zool. Exp. (4), vii., 

 1907, p. 349, fig. v.) 



These specimens are, so far as the trophosome is concerned, 

 quite similar to those originally described ; but the gonangia 

 differ in the development of the angles at the sides of the orifice, 

 which are prolonged upwards into erect tubular horns, attaining 

 in some instances as much as one-fourth the length of the body 

 of the gonangium. 



Billard xanites S. bidens with S. incqrfestoiiei under the name of 

 Thuiaria maplestonei. The two species are undoubtedly closely 

 allied, but the different forms of the hydrotheca 1 in our specimens 

 justifies, I think, their separation, at least pending the discovery 

 of intermediate forms. My specimens of both species show the 

 small internal process near the base of the hydrotheca?, but I 

 cannot find in any instance the double process higher up on the same 

 side, as seen by Warren and Billard in their African specimens of 

 S. bidens. Nor can I find the internal tooth below the margin on 

 the adcauline side, though in some cases the hydrotheea-wall is 

 thickened at this part so as to resemble, in side view, a projecting 

 tooth, a feature common to a number of species. 



As to the generic position of these species, I refer to my 

 preceding remarks under Sertularia. Their habit is in all 

 respects similar to that of 8. elongata. 



Log.: — Hunter Group, 15 fathoms ; Bass Strait. 



Sertularia dnguicdlata, Bush. 



Sertularia ungniculata, Busk, Voy. " Rattlesnake," 1852, 

 p. 394 ; Baie. Cat. Austr. Hyd. Zooph., 1884, p. 76, pi. vi., 

 fig. 9-12, pi. xix., fig. 8; id., Proc. Roy. Soc. Vict., vi., 

 (N.S.), 1893, p. 100; Marktanner-Turneretscher, Ann. k.k. 

 nat urhist. H~ f museums Wien, v., 1890, p. 231 ; Farquhar, 

 Trans, N.Z. J 6 t., xxviii., 1890, p. 459. 



Sertularia, sj ?, Coughtrey, Ann. Mag. Nat. Hist. (4), 

 xvii,, 1876, p. 29 (note), pi. iii. 



Thuiaria ambigua, D'A. W. Thompson, Ann. Mag. Nat, Hist. 

 (5), iii., 1879, p. Ill, pi. xix., fig. 2. 2a; Kirchenpauer, 

 Abh. Nat. Ver. Hamb., viii., 1884, p. -25. 



