iJS Proceedings of the Royal Society of Victoria. 



would yet exhibit strong affinities with the Sertularians. This 

 was recognised by Lamarck, who included such species as a 

 section of the genus Sertularia, thereby, however, placing them 

 on the wrong side of the boundary line. 



Campanularia tridentata, n. sp. 

 (Plate in., fig. 3) 



Hydrocaulus simple, about half an inch in height, each inter- 

 node bearing a short process from which springs a hydrotheca. 

 Hydrothecae alternate, tubular above, curving inwards towards 

 the base on the upper side only, so that the lower or outer wall 

 of the cell is straight or concave, while the upper is strongly 

 convex ; aperture with three pointed teeth (or three deep emar- 

 ginations), and an operculum of three pieces. 



Gonothecoe ? 



Hab.—Vort Phillip Bay (Mr. J. B. Wilson). 



This is a member of the group which includes operculate species 

 such as C. Torres a and inoperculate species like C. ins ignis and 

 C. rufa. From such of the former as are already known it 

 differs in having three valves instead of four, as well as in its 

 small size and simple habit. In this group each hydrotheca 

 usually springs, as in Sertidarella, from a distinct internode ; the 

 hydrothecse have short peduncles of one or two joints only, and 

 they are mostly gibbous above the base on the side next the 

 hydrocaulus, but less so or not at all on the outer side. In 

 C. tridentata the margin of the hydrotheca proper is scarcely 

 thicker than the valves into which it is continued ; the line of 

 demarcation is therefore not conspicuous. 



Campanularia insignis, Allman. 



This species, described in the Challenger Report, appears to be 

 the same which Busk identities with the Laomedea antipathes 

 of Lamouroux. Busk says of Laomedea Torresii that " at first 

 sight it is very like L. antipathes, Lamx., which occurs in New 

 Zealand, but differs materially in its smaller size and in the four 

 shallow emarginations of the mouth, which part in L. antipathes 

 is entire and with the margin a little thickened." As Campanu- 



