BY W. M. BALE. 757 



original stem. When it reaches the object on which the zoophyte 

 is growing it becomes attached thereto, and assuming the character 

 of the hydrorhiza, gives off fresh shoots. In nearly all my 

 specimens the downward growth of the supplemental tube was 

 arrested by the death of the organism before it could reach the 

 base of the stem, leaving it with an obliquely truncated extremity. 



CAMPANULARIA (?) SERRULATA, n.sp. 



(Plate XII., fig. 4). 



Hydrorhiza slender, climbing ; hydrothecae borne on long 

 peduncles, which spring either directly from the hydrorhiza or from 

 the side of other peduncles ; peduncles slender, with about 8-16 

 rings at the base and a less number (mostly 2 or 3) at the summit, 

 smooth throughout the rest of their length. Hydrothecae large, 

 campanulate, constricted at the " floor," which is raised above the 

 base so as to enclose a nearly cylindiical cavity ; margin not 

 expanding, armed with about 10-14 rather large, triangular, 

 pointed teeth. 



Gonosome unknown. 



Hob. Port Jackson, on a Tubularia. 



This is a delicate species, with no proper stem, but the primary 

 peduncles generally give origin to secondary ones exactly resembling 

 them, the habit in this respect being similar to that of G. mar- 

 ginata, a species otherwise very different to the present. The 

 rings of the peduncles are distinct and regular, as in C. spinulosa. 

 The specimens were less than half an inch in height. 



CAMPAXULARIA COSTATA, Bale. 



Near Peel Island, Moreton Bay, parasitic on Pasythea hexodon. 

 (Mr. J. D. Ogilby). 



The aperture is more or less oblique in most of the specimens. 

 Perhaps this species might best be placed in the genus Lafoea. 



