AasfndittiK Hydrohls. 85 



Hydrothceae luiu-li cdiiiiu'essod, llie two hinad sides t'<iniiiii<j; erect 

 •convex lobes, the intermediate sides lower, forming two lips, one 

 lower than the other; the interior nearly tilled up Avith solid peri- 

 sarc, pierced by the hydropore. which is enlarged just above its 

 lower extremity, and gi-adually widens out above into the shallow 

 cavity of the liydrotheca. 



Gonothecae usually deeuml)eut, euneate, compressed, rounded at 

 the top wlien mature, shortly but distinctly stalked, their perisai-c 

 thickened towards the basfe. 



Hydranths seated' in the concavity of the hydrothecae, base flat- 

 tened, a large rounded retractile inflation of that side of the body 

 which is over the lower lip ; proximal portion of the tentacles united 

 and joined In- an annular band into a calyx surroun<ling the oi-al 

 extremity. 



Gonophores — sporosacs, one or two in each gonotheca. 



The foregoing description refers to the specimens which formed 

 part of Von Lendenfeld's types of Eucopella campanularia, and 

 which, as already mentioned, were sent to me from the Australian 

 Museum. The description applies equally to the two forms from 

 Bondi figured by me in the Proceedings of the Linnean Society 

 of New South Wales, under the name of E. campanularia. There 

 are slight differences among these forms, and as there may be a 

 doubt as to whether they should all be classed together, I now figure 

 the actual specimens taken from Von Lendenfeld's types. The re- 

 lationship between these three forms, also Eucopella reticulnta 

 Hartlaub, is very close. 



In Von Lendenfeld's specimens tlie liydrorhiza is extremely broad, 

 reaching about .-S'^mm., of which the internal cavity occupies alxmt 

 .15 mm. When torn off and turned edgewise it is seen to be much 

 flattened. The peduncles also are very massive, the longer ones 

 may be attenuated in the middle portion, owing to the perisarc !:>€- 

 ing thinner, but neai- the extremities they usually reach their 

 normal diameter. The canal giadually widens a little to the base, 

 and as the perisarc is narrowed in at the same pa)t, the area of 

 attachment is slender. Just at the top of the peduncle there is 

 a distinct internal inflation of the canal. The bead-like segment 

 between the hydrotheca and the peduncle may be globular, or it 

 may be angular round the equator, and sometimes there is a second, 

 and larger, globular bead. The peduncles may be tumid at the top 

 •and bottom, and theii- length is variable, some being less than twice 

 the length of a liydrotheca, othei's ten times that length, but short 

 'Ones predominate. 



