354 Mr. H. J. Carter on 



3, ecLinating, acuate, clavate, spined throughout, 17-6000ths 

 long. All congregated together and when projecting from the 

 superficial ends of the fibre producing the granulations and 

 hirsute character of the surface. No. 2, in great abundance, 

 separate or together leaf-like, round the lower part of no. 1. 

 Structure soft and hirsute on the surface, hard towards the axis, 

 verj like Ascinella setacea (p. 359), which, but for the absence of 

 the echinating spicule (which, however, is often soscarce in this 

 kind of sponges as to pass unnoticed without prolonged exa- 

 mination), would have been placed in the group Dictyocylin- 

 drina. Size of specimen 12 in. long. 



Depth 5 fath. 



Ohs. By " compressed " is meant more or less in the same 

 plane. 



6. Dictyocylindrus cacticutis. 



Stipitate, somewhat compressed head of branches inter- 

 united after the first division into irregular compressed lobes, 

 proliferously covered with radiating, ragged, thorn-like ridges 

 and points. Consistence soft on the surface, harder towards 

 the axis. Colour, when fresh, " black," now black-brown. 

 Surface scattered over with thorn-like elevations, cactus-like, 

 covered by a smooth dermis. Vents chiefly on the margins of 

 the compressed lobes. Spicules of two forms, viz. : — 1, skele- 

 tal, subpinlike, curved, smooth, Qb by 2^-6000ths, chiefly 

 confined to the fibre ; 2, echinating, acuate, spined, 25 by 

 3-6000ths, including the spines. Structure compact, chiefly 

 towards the axis, but not distinctly hard in the centre. Size 

 of specimen <'i x 3 x 3 in. including the stem, which is short 

 and thick. 



Depth 19 fath. 



7. Dictyocylindrus pinif or mis. 



Stipitate, massive head of proliferous lobes ; lobes com- 

 pressed, thick, expanded, united together in the centre ; irre- 

 gularly and reticulately nodose over the surface and margins. 

 Consistence resilient externally, becoming dense towards the 

 axis. Colour, when fresh, "drab," now sponge-drab. Pores 

 and vents not conspicuous. Spicules of three forms^ viz. : — 

 1, skeletal, acerate, curved, smooth ; 2, also skeletal, but 

 acuate^ curved, and smooth, both about the same size, viz. 35 

 by |-6G00th ; 3, echinating, acuate, clavate, spined through- 

 out, 12-6000ths long. Structure compact externally, becom- 

 ing denser towards the axis. Size of specimen 5 in. high 

 including the stem, head 3x3 in. horizontally. 

 ; Depth not stated. 



