210 ON THE BEAI]S' OF TUE TIGER SKAEK, 



Meyenia Kamsayi, sp. n. 



Sponge massive, tubercular, or with finger like projections, the 

 oscula being situated between the tubercles or projections ; rather 

 brittle ; colour grass-green to greyish-yellow. Skeleton-spicules 

 curved, fusiform, rather abruptly acute, perfectly smooth. Stato- 

 blasts spherical, protected by a layer of birotulate spicules, con- 

 sisting of a stout cylindrical shaft armed with 1-10 acute and 

 prominent spines, and terminal rotulx', the edges of which are 

 deeply dentate or spinous, the teeth — to the number of between 

 12 and 20 — being irregular in size and acute. 



Found by Mr. E. P. Eamsay in the Bell Eiver at Wellington, 

 growing in considerable masses attached to submerged timber. 



This species is rather nearly related to S. Meyeni, from Bombay, 

 which has the amphidiscs of a very similar form ; but the skeleton- 

 spicules of that species are obsoletely spinous, and the spines on 

 the shaft of the amphidisc are fewer. 



Of the fifth Australian species of Fresh-water Sponge, which 

 occurs in the Botany Heservoirs I have only a few spicules kindly 

 given me by Dr. Morris — the sponge itself not having yet been 

 found, probably from the fact of its being, like Meyenia Ramsayit 

 a rather deep-growing species, and not to be readily got at unless 

 when the water is exceptionally low. It is a species of Meyenia, 

 and quite distinct from M. Ramsayi and M. Capewelli. 



Note ox the Braix of the Tiger Shark [Galeocerdo Rayneri.) 



By William A. Haswell, M.A., B.Sc. 



The acquisition a few months ago by the Australian Museum 

 of a large specimen of Galcoccrdo Rayneri (18 feet in length), 

 enabled me to examine and make a few notes on its brain, \(>hich, 

 as far as I can ascertain, has not been previously described or 

 figured. Unfortunately the specimen had been dead for more 

 than two days before I had the opportunity of dissecting it, and, 



