9 5 7 



species [lo], p. 105, of this genus the autogastraUa are hexactine 

 or hexactine and pentactine- In a species of a closely aUie|d 

 genus^ Staurocalyptus pleorhaphides , Ijima [3], p- 58, both the 

 dermal and gastral membranes are supported by spinous 

 diactines. 



Locality. — Large specimen. Lion's Head N- 73° E. distant 28 

 miles, depth 140 fathoms; small specimen. Lion's Head N. 63° 

 E- distant 34 miles, depth 154 fathoms. Both specimens ob- 

 tained by shrimp trawl. 



Sub-family Rossellinse, F. E. Schulze [8], p. 348. 



Genus CraterOmorpha (Gray), Carter. 



Crateroniorpha lankesteri, sp. n. 



Plate I, figs. 1-11. 



Sponge trumpet-shaped, with a well-developed curved stalk 

 expanding into a wide shallow trumpet-like expansion or cup 

 facing laterally, the central axis of the cup continuing the curve 

 of the stalk. Colour pale yellow, and the texture of the cup-wall 

 like that of loose felt. Dermal surface of the cup even, and 

 covered with a fine lace-like reticulum. Gastral surface covered 

 with a continuous mesh-work, papillated at the base of the cup, 

 and roofing over the efferent canals and stalk canals- Edge oi 

 cup, thin, sharp-cut, without a fringe of spicules. 



Stalk curved, sub-cylindrical, diminishing slightly from below 

 upwards ; compressed laterally below, and from before backwards 

 at the upper end, where it expands funnel-like into the cup- 

 Surface covered with a yellow fluff. Texture firm,^ felt-like, 

 slightly compressible. With four or more anastomosing longi- 

 tudinal canals in the centre. 



Skeleton. The bulk of the skeleton is composed of a network 

 of bundles of diacts, with medium-sized and large hexacts inter- 

 spersed ; the intermedia consist solely of oxyhexasters. The lace- 

 like dermal membrane, which is supported by pentacts, coversl a 

 hypodermal network formed of bundles of diacts. Beneath Is 

 gastral layer of pentacts is a hypogastral network of diacts, the 

 strands of which are covered with small hexacts- The vertical 

 ray of the dermal and gastral pentacts projects into the paren- 

 chyma- The stalk is formed of longitudinal bundles of diacts 

 supported here and there by very large solitary diacts, and of 

 medium-sized, usually solitary, diacts arranged in horizontal 

 plane and frequently radiating. 



The fluff which covers the surface is chiefly composed of pen- 

 tacts- Small hexacts line the stalk canals. 



