254 



the base, the oscules are all level with the surface, and the oxeas 

 blunt-pointed and only 145 x 6 jn. 



Lundbeck [13, p. 56] abolishes Carter's group Phoeodictyinae, 

 placing the genus Phlceodictyon (of which Rhizochalina in the 

 sense of later authors than Schmidt is a synonym) under 

 Renierinae near Petrosia. In the preliminary examination of 

 the specimen I had labelled it Petrosia. 



Genus Fellina (Schmidt). 

 Pellina, sp. 



A small damaged funnel-shaped specimen 5 cm. in length, 

 and 2.5 cm. in diameter at the summit, of brownish colour 

 uniformly speckled with light grey spots. There is a well 

 marked dermal membrane with oval meshes 370 x 310 /.i, the 

 pore areas being in the meshes. 



The skeleton is formed of rectangular meshes about 

 300 X 150 ft, the long strands being about 10 spicules thick, 

 and the short transverse strands 2 or 3 spicules thick. 



The spicules are oxeas, 165 x 6.5 ytt, curved at the centre, and 

 tapering gradually to sharp points. 



Localitv C. — Off Tugela River mouth, 65-80 fathoms ; hard 

 ground. 



Genus Halichondria (Fleming). 



Haliohondria pachas crelloides (Topsent). 



1892. Halichoudria hachastrcUoidcs, Topsent [16, p. 66, pi. ix. fig. 3]. 



I have little hesitation in identifying with the above species 

 tw^o massive specimens, the larger of which is 10 cm. long, 

 5 cm. high, and 6 cm. broad. One specimen, in spirit, is of a 

 rich yellow colour in section, the other in formalin is greenish. 



The oxeas vary from 150 x 4 ^ to 700 x 28 yu, and have a 

 slight bend in the centre. Both specimens are encrusted by 

 Biibaris rcptans uiihi. 



Locality E. - Cone Point, Natal, 34 fathoms ; bottom, broken 

 shells. 



Distribution.^ — Azores, 401 fathoms ; Natal, 34 fathoms. 



Genus Coscinoderma (Carter). 



Coscinoderma concentricum, sp. n. 



Plate VI., Fig. 19, 19a. 



Sponge bowl-shaped, with a short thick stem. 

 The surface covered with a thin cortex, 60 fi thick, composed 

 chiefly of sand particles ; the cortex on the outer surface being 



