BY W. M. BALE. 747 



PLUMULARIA TORRESIA, von Lendenfeld. 



Ic. p. 477, PL XIII., figs. 13, 14 ; PI. XIV., fig. 16 ; P. campa- 

 nula, Busk. (See page 776). 



PLUMULARIA TRIPARTITA, von. Lendenfeld. 

 I.e. p. 477, PI. XII., figs. 8-10. =P. setacea, Ellis. (See page 778). 



PENNARIA ROSEA, von Lendenfeld. 

 l.c. p. 594, PI. XXIV., figs. 4042. 



This species is, as Mr. Whitelegge has pointed out to me, 

 identical with the P. australis of the Catalogue of the Australian 

 Hydroid Zoophytes. I have described this species as having 

 7-12 filiform tentacles, and 9-14 capitate ones, while P. rosea is 

 stated to have 30-40 and 20-30 respectively. The discrepancy 

 (especially in the number of the filiform tentacles) is very great, 

 and I cannot account for it. I have examined many hydranths 

 (including terminal ones) both from my original specimens and 

 from Dr. von Lendenf eld's types, and have not succeeded in 

 finding any with a larger number of tentacles than I have 

 recorded, except in one or two cases where the number of capitate 

 tentacles reached about 17. Mr. Whitelegge has kindly examined 

 a number of specimens with the same result. The figure which 

 accompanies Dr. von Lendenfeld's description shows a hydranth 

 with not more than 10 or 12 capitate tentacles. I have not 

 found the proboscis or oral portion separated from the rest of the 

 body so sharply as shown by Dr. von Lendenfeld.* 



P. australis is very closely allied to P. symmetrica, Clarke, the 

 polypary especially so ; but the hydranths of P. symmetrica are 

 ovate, not flask-shaped, and have about 30 capitate and 14-18 

 filiform tentacles. 



*Dr. von Lendenfeld has a note, to which reference is wanting, at the 

 foot of the page containing his description of P. rosea, referring to page 45 

 of the "Catalogue " (the description of P. australis] ; it is evident, there- 

 fore, that he intended at first to refer his specimens to that species, where 

 they undoubtedly belong. 



