THE SPONGES. 155 



AXINELLIDAE Ridley and Dcndy. 

 Phakellia Bwk. 



1864. Pliakdlia Bowerbaiik, 1864, p. 186. 



1880. Phakellia Bwk., 0. Schmidt, 1880, p. 81. 

 1887. " " Vosmaer, 1887, p. 341. 



1887. " " Riciley & Deudy, 1887, p. 169. 



1894. " " Topseiit, 1894«, p. 25. 



1896. " " Deudy, 1896, p. 235. 



1897. " " Leudenfeld, 1897, p- 114. 



Phakellia lamelligera, sp. nov. 



Plate 18, Fig. 10; Plate 19, Figs. 8, 3; Plate 85, Figs. 1, 3, 4. 



Diagnosis. Sponge body a cup with much-fluted wall, fluting increasing toward 

 margin of cup. Wall of cup lamellate, 2-3 mm. thick, strongly hispid on both surfaces. 



Color light brown. Inner or oscular face of cup studded with oscula 300-500 /x in 



diameter and about 1 mm. apart. Outer or pore surface studded with rounded pore- 

 membranes 300-500 ft in diameter and about 1 mm. apart. Main afferent and efferent 

 canals alike, 300-500 ya wide, and passing radially into the lamella from the oscula and 



pore-membranes, respectively. Spicules. 1. Oxea, 540 x 32 ^i. 2. Style, 400 x 30 /x. 



3. Style, 1275 x 28 jx. Skeletal framework a continuous reticulum made up of spiculo- 

 fibres which have the shape of flattened bands or lamellae extending at right angles to the 

 surfaces of the sponge. 



Station S368, 1 specimen. 



Sponge body (Fig. 3, Plate 19) is a folded lamella which has assumed 

 the shape of a cup with a fluted wall. Cup is compressed from side to side, 

 and is thus wider in one horizontal axis than in the others. The folds in- 

 crease in extent from the base toward the free edge. Below, the cup nar- 

 rows to a base which is composed of two short irregular peduncular portions, 

 situated close together. Total height of cup, 63 mm. ; greater horizontal 

 diameter, 110 mm. ; smaller horizontal diameter, 55 mm. Thickness of 

 lamellar wall in lower part of cup, 3 mm. Wall is thinner above, about 

 2 mm. thick just below the free edge. Edge itself is comparatively sharp. 

 Both inner and outer surfaces of the cup are hispid with closely set styles, 

 which project about 1 mm. beyond the surface. Consistency firm, buu 

 sponge easily broken. Color, light brown. 



The two surfaces are much alike, although one, the inner, is probably 

 the oscular, and one, the outer, probably the pore surface. From both sur- 

 faces numerous main canals 300-500 /x in diameter and about 1 mm. apart 

 pass radially into the body. They penetrate deeply into the body, the canals 



