328 Messrs. S. O. Eldley and A. Dendy on 



Main skeleton a confused but subrectangular reticulation of 

 loose fibre two or tln-ee spicules wide. Also a unispicular 

 dermal reticulation. Spicules slightly curved, subliastately 

 and sharply pointed acerates ; size "3 by -013 niillim. 



Locality. Station 307, south-west coast of Patagonia, 147 

 fath. 



Eeniera tufa^ n. sp. 



Massive, sessile, cake-like. Greyish yellow. Texture 

 firm, almost stony, but brittle. Surface smooth but uneven. 

 Dermal membrane readily peeling off. Vents rather small, 

 circular, level with surface. Skeleton a compact but rather 

 irregular, almost unispicular reticulation with triangular 

 meshes. Spicules slightly curved, subhastately pointed ace- 

 rates ; size '2 by '01 millim. 



Locality. St. Jago, Cape Verds, 100-128 fath. 



Subfamily ii. Cmalinina. 



A considerable amount of spongin present, typically forming 

 a tliick sheath around the fibres. 



The classification of the Clialinina is at present in a very 

 unsatisfactory condition. We hope to learn much from Dr. 

 V. Lendenfeld's forthcoming descriptions of his Australian 

 species, and must acknowledge our indebtedness to him for 

 allowing us to examine his specimens, a few of which are 

 identical with species here described. 



Genus Pachychalina (Schmidt). 



Lobose or digitate, solid, with even surface. Fibres stout, 

 with spicules numerous, arranged polyserially. 



Pachychalina megalorrhaphis, n. sp. 



Long cylindrical branches up to | inch thick. Pale yellow. 

 Compressible and elastic. Surface nearly smooth. Dermal 

 membrane thin. Vents small, subuniserially arranged. 

 Skeleton : — (o) dermal, not very distinct, small-meshed, loose- 

 fibred, echinated at nodes by ends of primaries ; {h) main, a 

 subrectangular reticulation of spiculo-fibre and scattered spi- 

 cules, primary lines distinct. Fibres strong ; no distinct 

 sheath of spongin. Spicules slightly curved, gradually sharp- 

 pointed acerates ; size "25 by "016 millim. 



Locality. Station 163 D, oft^ New South Wales, 120 fath. 



