EURETID. 141 



EURETID (?) FROM STATION 4685. 



There are in the collection three small, flat, lamellar fragments about 1 mm. 

 thick, the largest of which is IG mm. long, trawled in the southeastern Pacific at 

 Station 46S5 on 10 December, 1904; 21° 36.2' S., 94° 56' W.; depth 4033 m. 

 (2205 f.); they grew on dark brown clay; the bottom-temperature was 35.3°. 



These lamellae are skeleton-nets composed on one face of longitudinal and 

 transverse beams, mostly 40-50 ix thick, which enclose square, rectangular 

 meshes, generally 300-500 m long and 200-250 yu broad; on the other face of 

 considerably thinner beams, which enclose smaller, irregularly triangular meshes. 

 The beams are mostly spined. The spinulation is more developed in the irregu- 

 lar than in the regular part of the network. Numerous hexactines, 100-150 p. 

 or more in diameter, are attached by one ray to the beams of this network. 



These skeleton-nets probably belonged to a euretid. 



EURETID (?) FROM STATION 4695. 



There are in the collection four fragments of skeleton-nets of this sponge 

 trawled northeast of Eastern Island, at Station 4695 on 23 December, 1904; 

 25° 22.4' S., 107° 45' W.; depth 3694 m. (2020 f.); they grew on fine, light 

 brown ooze. 



The largest and least incomplete is 32 mm. high, and appears as a tubular 

 stalk, extending above to a thin-walled funnel 22 mm. in diameter. The stalk 

 is about 10 mm. long, and in the middle, where it is somewhat attenuated, of 

 oval, transverse section, 6.5 mm. broad and 4.5 mm. thick. 



The skeleton-net of the stalk is irregular, composed of longitudinal and oblique 

 spined beams, the former about 90 ^ thick, the latter 15-50 m. In places the 

 stout longitudinal beams of this part of the net bear numerous, vertically arising 

 thorns, 6-10 m thick at the base, and of varying length. The meshes of this 

 network are irregular, generally 50-200 ^ wide. The skeleton-net of the funnel 

 is more regular, chiefly composed of longitudinal and transverse beams. Oblique 

 beams, however, also occur in it, particularly in its outer zone. The beams of 

 this network are smooth and 50-130 m thick, the meshes in the inner zone 

 square, rectangular, in the outer zone more frequently triangular. The rec- 

 tangular meshes of the inner zone are mostly about 600 m long and 300-400 n 

 broad. Verticil thorns, directed towards the funnel-cavity, arise from the nodes 

 of the inner part of this network. 



