NOTES ON LENDENFELD's TYPES OF SPONGES — 'WHITELEGGK. 275 



has been neatly perforated by a boring Isopod, and hence it is 

 labelled Placochalina porosa. Antherochalina dura is represented 

 by a specimen of the cake-shaped Chalina globosa, and appears 

 under the manuscript name of Suberochalina panis. The follow- 

 ing cases will convey to the reader some idea of the difficulties 

 met with, and also of the confusion revealed by the examination 

 of this collection. I may here remark that the examples are not 

 all regarded as types, although it is possible some of them may be 

 portions of the actual type specimen. 



There are three examples bearing the name of Antherochalina 

 perforata, two in the exhibited collection and one from the British 

 Museum. The spicules in the original diagnosis are given as 

 " oxea 0-09 mm. long and 0-003 mm, thick." A specimen from 

 Port Phillip (No. 292) agrees with the figure and description in 

 every point except one, and that is that the spicules arestyli 0'09 

 to Oil mm. long and 0-003 to 0-004 mm. thick. 



The British Museum specimen from Broughton Islands, New 

 South Wales, — which is the original habitat given for the type, — 

 is too fragmentary to afford any characters except those pertaining 

 to a section. The spicules present are — (aj stout styli, O"! to 0-15 

 O'Ol mm. ; (b) slender tylostyli, over 0-2 mm. long and 003 by 

 mm. in diameter ; (a ?) I have also observed spicules which may 

 be echinating styli, about 0-06 mm. long. No. 315, the third 

 specimen, is identical with the following species. 



There are also three examples bearing the name of Anthero' 

 chalina frondosa ; two of these agree with the figure and 

 the description. The spicules are described as " curved styli, 0-3 

 mm. long, and 0016 mm. thick." In our specimen, and also in 

 that from the British Museum, there are at least three other forms 

 of spicules present — (a) curved strongyla, (b) slender oxea and 

 styli, and (c) minutely spined echinating styli, with blunt spinose 

 apices. The third example (No. 329) is identical with Reniera 

 dendyi. 



With regard to the above, I feel convinced that the Port 

 Phillip specimen of A. perjorata is correct, and by adding the 

 word styli in place of oxea, the description and the specimen 

 would be brought into full accord. But there remains the speci- 

 men from Broughton Islands, which is probably a species of the 

 genus Clathria. 



The case of A. frondosa is not so simple, inasmuch as the 

 description requires three kinds of spicules adding, one of which 

 indicates that the species belongs to the Ectyoninse, and not to 

 the Ohalininse. The Museum specimen resembles the figured type 

 so closely that it requires close inspection to be sure that it is 

 not the example figured. The sponge is described as being 

 " longitudinally folded lamella ;" it is possible that our example 



