Catalogue of Non-Calcareous Sponges. 241 



Pachychalina aunintiaia, Lendenfeld, sp. 1 



1 Cladochahna aurantiaca, Lendenfeld, Zoologischer Jahrbii- 

 cher, vol ii., p. 768 (1887). 



Sponge varying in form' from compressed lamellar to digitate. 

 Surface smooth, with minutely reticulate dermal membrane. 

 Vents small, numerous ; irregularly scattered, marginal or 

 confined to one side. Texture soft, resilient. Colour in spirit 

 pale yellow. 



Skeleton., rather wide-meshed, with stout main fibres curving 

 outwards from the centre to the sui'face, and densely packed with 

 numerous small oxea ; these are leather sparingly connected by 

 slenderer secondary fibres which run approximately at right 

 angles to them, and are also multispicular. Immense numbers 

 of spicules are also scattered in the soft tissues between the 

 fibres. There is a well-marked dermal skeleton composed cliietiy 

 of close-set tufts of spicules arranged perpendicular to the surface 

 and forming a close-meshed polygonal network when viewed from 

 the exterior. 



Spicules, small, slender oxea ; gently curved, and gradually 

 sharp pointed ; measuring about 0"14 by 0-004 mm. 



Von Lendenfeld's type is stated to come from Port Phillip, so 

 that in spite of the meagreness of his description the identification 

 seems fairly likely to be cori"ect, although the spicular measure- 

 ments difter slightly. 



R.N. 410 (x, 19 f ; "ochre yellow"); 753 (s. 5, ''ochre buff"'); 

 823 (x). 



Pachychalina clavifornus., Carter, sp. 



Acervochalina clavifor/nis, Carter, A.M.N.H., November, 1886, 

 p. 376. 



I have only seen a fragment of one of Mr. Carter's sjDecimens 

 from the British Museum ; the species ajDpears to be rare. It is 

 characterised liy its erect, cylindrical or pear-shaped form, with 

 discoid, root-like attachment below. The surface is smooth ; the 

 veiits numei'ous and large ; the texture very loose and tender. 

 The skeleton is a very sparse and irregular network of ill-defined, 

 slender, partly nmltispicular and partly unispicular fibres. The 

 spicules are slightly curved, gradually sharp-pointed oxea, 

 measuring about 0-17 by O'OOG mm. 



B.M. sp. 32 (^'•Acervochalina clavi_formis'' Reg. 86-12-1.5-50). 



