THE SERTULARID/E. 103 



origin to the branches. Branches divided into internodes. ratln'i- short, issuing from all sides of 

 the principal stem, one from each of the internndes. ramified in their turn so that each branch 

 internode gives off a secondary branch, which is divided once or twice: and all these secondary 

 brandies are turned toward the axis of the colony (inward). Hydrothecae tubular, a little con- 

 tracted at the extremity; aperture broad, oval, furnished with two large teeth arranged unsyin- 

 metrically; arrangement of the hydrothecse, although biserial, not in the same plane, having at 

 the first glance the appearance of being unisonal." 



(idiiiKinn, . Unknown. 



I>'is1i-'tl,,t1'tnn. Unalaska (M. Petelin), 1847. 



I have not been able to secure a specimen of this species, and have copied the original 

 description entire, as well as the drawing. 



Type.\\\ collection of the Academy of Sciences, St. Petersburg. 



SERTULARELLA EPISCOPUS Allman. 

 ( Plate XXVI, fi K . 7. ) 



tScrtvlarin fusiform!* Ilnrox, Trans. New /calami Inst., V, 1872, )>. 257. 

 ^rliilinrllii I'liixi-iijinx Ai, I.MAN, Journ. Linn. Sue. /mil., XII, 1874, p. 263. 

 Ssrtefarta./ugiformtsCouGHTHHnr, Trans. New Zealand Inst., VII. 1S7"), p. 285. 

 i^i-i-liiliirin Iniiffii'instii CnriiiiTREY, Ann. and Ma^r., 4th ser., XVII, 187fi, p. 28. 



Si'iinlili-i/lii I'/iiwnyiii.v KlRCIIENI'Al'ER, Nonlisclle < i;'.ttuilf, r ell, 1 8S4, p. 51. 



f</-iiiiliii-i-/lii fjiixrupuH BALE, Trans. IJnyal Sue. Victoria, 1887, p. lo:;. 

 Ku-riituriii jiixij'iiniiix I'PEFPEB, Die niedere Tierwelt dea Ant. Ut'er<reli., isn:;. p. 568. 

 Sertularella i-jiixrn/mx V. \n<ir.uiR, Trans. New Zealaml Inst., XXVIII, ISliii, ji. -Iii4. 

 ti'i'tiilin-i-l/H i'/>!t:rn]>iiH HAKTLACH, Revision der Sertulurella-Arten, 1900, p. 4!i. 



t'. Ilydrocaulus attaining a height of about an inch, simple, given off at short 

 intervals from a creeping ramified tubular fibre. Ilydrothocu- tuhiform. springing from the 

 distal end of the supporting internode, to which they are attached by their fundus. free in the 

 remainder of their height, and strongly diverging from the stem; orifice deeply cleft above and 

 below, so as to present a mitre-like form, bordered by a thickened margin, below which, on the 

 side facing the internode, there is a thickened involution of the walls of the hydrotheca. 



11 Cfonosbme. Qonangla elongated, ovoid, with one wide and shallow and two narrow and 

 deep longitudinal depressions, which extend from the summit to the base, supported by a short. 

 thickish peduncle springing one from each internode at the side opposite to that which carries 

 the hydrotheca. " 



Distribution. New Zealand, Lyall Hay (Ilutton); Straits of Magellan (Pfeffer). 



I have not seen specimens of this species and have copied the above description from that 

 given by Allman. The form of the gonangia as figured is unique, I believe, among the species 

 of this genus, reminding one of certain ones in the genus Al>'ti nnria. 



SERTULARELLA MAGNA, new species. 



(Plate XX VI I, li- 1.) 



Tropfaosome. Colony (fragmentary) about 3i- inches high, not fascicled, internodes irregu- 

 lar, long. There is but. a single dichotomous branching near the top, the usual axillary hydro- 

 theca being present; but several of the proximal branches are produced into much annulated 

 shoots which resemble the so-called stolons found in various groups of hydroids. Hydrotheca- 

 enormous for this group, being many times as large as those of S.polyzonias, alternate, tubular, 

 doubly curved, the distal extremity being turned slightly upward, about thedNtal two-thirds free; 

 margins several times reduplicated, cither smooth or with two or three or sometimes four low 

 inconspicuous teeth. Operculum thick, conspicuous, a simple membrane of a single flap where 

 the margin is even, with two flaps when there are two evident teeth, sometimes apparently with 

 more than two flaps, but thev are not well defined, probably because the teeth, when three or 

 four, are very low and inconspicuous. 

 Oonoeome. Not known. 



