352 



W. M. Bale 



The goiiocladia occur at somewhat irregular intervals, taking the 

 place of hydrocladia. In the female there are usually about 6-10' 

 internodes, two, or sometimes only one, of which bear gonangia. 

 The others bear mostly three sarcothecae, apparently representing 

 those of th^ suppressed hydrothecae; but they are often quite 

 irregular. There is a liydrotheca on the proximal part of the 

 gonocladium,, and generally one or two abortive ones also. In the- 

 nxale the gonocladium, according to Kirchenpauer,. bears one- 

 gonangium, immediately above which it is abbreviated. In most 

 instances, however, I found one or two internodes above the- 

 gonangium, with sarcothecae similar to those on the female. The- 

 proximal liydrotheca seems absent in most cases. The condition 

 is analogous to that of many of the Af/laopheniae, in -which the- 

 protective structures surrounding the gonangia are more developed 

 in the female than in the male, though similar in kind. 



In these specimens the thread-cells are large and numerous, and 

 are found abundantly in the interior of the tubes of the perisarc, 

 just as in my former specimens of L. phillijn7ivs. Kirchenpauer 

 figures these bodies in that species, but does not mention their 

 prcvsence in hisi (description of L. urens. He refers, hoAvever, tO' 

 the powerful urticating properties of both forms. 



Congdon's " L. 7j7i?/^?7>mi/s " has no resemblance to Kirchen- 

 pauer 's species. 



Aglaophexia sinuosa Bale. 



Aglaophenia sinuosa, Bale, Proc. Linn. Soc. N.S.W. (2), 

 iii., 1888, p. 790, pi. xxi., figs. 1, 2. 



A. sinuosa and the species or variety next to be described are- 

 somewhat exceptional among the Australian species in the mono- 

 siphonic habit, a feature more common among the Halicornariae, 

 as also is the possession of a cauline sarcotheca situated at the 

 back of each axil. 



The lower part of the stem bears sarcothecae but no hydrocladia,. 

 and when the stem bifurcates, as is often the case, the cladiate 

 portion commences only above the bifurcation. One specimen 

 has the stem divided at about 5 mm. above the base, and each 

 branch again subdivides about 2 mm. higher, while in another 

 only one of the primary branches is again divided, but in none of 

 the specimens observed are hydrocladia found below any of the 

 bifurcations. 



The corbulae observed (or some of them) were female, free 

 planulae being present in one or two instances. The corbulae 



