199 
a larger number than Stuckey States. The mesogloea of the 
mesenteries is rather thick. The longitudinal muscles form no 
distinet pennons, only in the lower and inner part of the mesen¬ 
teries the muscle lamella forms some higher folds. The parieto- 
basilar muscles are strong and form inwards a very distinet fold on 
the mesenteries. Between the fold and the main lamella of the 
mesenteries the muscles are enclosed in the mesogloea. Also the 
basilar muscles are very strong and recall those in Bolocera longi- 
com/s (Ca rigren 1893). The “curious three division of the filaments 
provided with trefoils of the mesentery“, which Stuckey describes, 
is certainly arisen by contraction. The mesenteries and filaments 
are namely normally structured. The reproductive organs were best 
developed in the weaker mesenteries, in some stronger ones there were 
also a few ova or testes. All three examined specimens were pro¬ 
vided with a few large young in the coelenteric cavity. It is very 
remarkable that two of these three specimens were males, one a 
female. In the latter the ovaries were small, in the former the 
testes were very well developed on the mesenteries of the last 
cycle. I have not observed any traces of testes in the female or ova 
in the males. Under such circumstances it is hardly probable that 
the species is a proterandric hermafrodite. In the case that the 
species is dioecious, the embryos must in some manner have immi- 
grated in the coelenteric cavity of the males and there been retained. 
The size of the nematocysts (n) and spirocysts (sp) in different 
parts of the animal was as follows. 
Habitat 
Slipper Island 
Port Jackson 
Column 
n 
17—19 X well 1,5 fi. 
14—20 X 1,5—2. 
Marginal sphaerules 
n 
46 — 53 X 2,5—3 {i. 
37-48 X (2,5) 3 fi. 
41—50 X 3 — 3,5 fi. 
Habitat 
Slipper Island 
Port' Jackson 
Tentacles 
n sp 
19 — 23 X 1 , 5 — almost 2 //. 14X1 — 31X2,5//. 
20 — 24 X about 1,5 —almost 2//. 17X1 —30X2//. 
20—24 X about 1,5//. — 
Habitat 
Slipper Island 
Port Jackson 
Actinopharynx 
n 
21— 29 X almost 2—2 (2,5) //. 
19—24 X 1,5 —about 2. 
22— 29 X almost 2—2. 
