NOTES ON LENDENFELD's TYPES OF SPONGES — WIIITELEGGE. 285 



The British Museum specimen is evidently a bit from the 

 exhibited example. A well-preserved spirit example from Jervis 

 Bay exhibits numerous oxeote spicules in the ground substance. 



Chalina subarmigera, Ridleij. 

 Chalinopora intermedia, Lendenfeld. 



The only available specimen is from the British Museum, 

 received under Lendenfeld's name, and it agrees with the descrip- 

 tion. The spicules are oxea and measure 008 by 0'002o mm. 



Chalinopora lamella, Letidenfeld. 



No. 373. Sponge pedunculate, 140 mm. high, with a hand- 

 shaped lamina 70 mm. long, 65 mm. wide, and 5 mm. in thick- 

 ness. The upper margin exhibits four or five digitations. The 

 oscula occur on the margin, and also on the convex surface, 

 extending on to the upper part of the peduncle ; they are about 

 1 to 3 mm. in diameter and 5 mm. or more apart. The dermal 

 membrane exhibits numerous circumscribed pore areas, which are 

 separated by non-porous spaces. Texture in spirit close, soft, 

 moderately tough and elastic ; colour yellowish gray. The main 

 fibres in the central region form trellised bundles, with oval or 

 rounded mesh; they are 015 mm. in diameter and 5 mm. or 

 less apart. The ground substance is charged with numerous 

 spicules. 



Megascleres — {a) oxea of the ground substance, size 0-08 by 

 0-004 mm. ; (6) oxea of the fibres, 0-09 by 0-0025 mm. 



The spicules in the fibres of the British Museum fragment 

 agree with the above measurements. 



Chalinopora sipuonopsis, Lendenfeld. 

 The exhibited specimen (No. 342) does not agree with the 

 description. The spicules are oxea 0-08 by 00055 mm. The 

 British Museum fragment received under the above name appears 

 to be identical with Chalinopora tenella, Lendenfeld, and possesses 

 oxea 0-09 to 0-1 mm. by 0-0015 to 0002 ram. Neither specimen 

 exhibits any trace of "styli." 



Cladochalina euplax, Lendenfdd. 



No. 422. This form has already been dealt with in the "Report 

 on Sponges from the Coastal Beaches of New South Wales,'"' under 

 Chalina pahnata, Lamarck. 



No. 373. Chalinopora lamella, Lendenfeld, is identical with 

 C. euplax, Lendenfeld. 



Chalinella TENELLA, Lendenjeld. 

 The example exhibited under this name (No. 421) is a horny 

 sponge, with a highly conulose surface. The specimen from the 



6 Whitelegge — Eec. Aust. Mus., iv., 2, 1901, p. 73. 

 C 



