126 
EURETE ERECTUM. 
4685, on the 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 skeleton-nets are very regular and composed of smooth longitudinal 
and transverse beams, 40-60 m thick, which enclose square rectangular meshes 
about 750 p long and 200-350 p broad. 
The sponges to which these skeleton-nets belonged can be assigned with a 
considerable degree of certainty to Farrea. 
EURETE Semper. 
Euretidae composed of anastomosing tubes without central calyculate 
structure. With scopules, without clavules. 
The collection contains three specimens of this genus which belong to three 
species, one of which is new. 
Eurete erectum F. E. Schulze. 
Plate 30, figs. 1-17; Plate 31, figs. 1-28. 
Eurete erectum F. E. Schulze, Amerikanische Hexactinelliden, 1899, p. 72, taf. 17, figs. 1-3. 
Eurete erectum subsp. tubuliferum H. V. Wilson, Mem. M. C. Z., 1904, 30 , p. 63, pi. 7, figs. 9, 12; pi. 8, figs. 
1-3, 6. 
Eurete erectum subsp. gracile H. V. Wilson, Mem. M. C.Z., 1904, 30 , p. 69, pi. 8, figs. 4, 5, 8, 9; pi. 
9, figs. 1, 3, 5. 
Two specimens of this species, a fairly complete larger and a fragmentary 
smaller one, were trawled off the southern coast of western Panama, at Station 
4622 on 21 October, 1904; 6° 31' N., 81° 44' W.; depth 1067 m. (581 f.); they 
grew on green sand and rock. 
Shape and size. The larger specimen (Plate 30 , fig. 16) is a tube with quite 
regular circular transverse section. This tube is slightly spirally twisted, 67 mm. 
long, and throughout about 14 mm. in (outside) diameter. Its wall is 1-1.5 mm. 
thick and perforated by seven apertures. These are circular, arranged in a 
regular spiral, about 10 mm. wide, and surrounded by slightly protruding rims. 
The rims are in some places 5 mm. high and above strongly curved outward. 
They appear as rudiments of wide calyculate branches of the main-tube. The 
smaller specimen is a fragment of a similar but wider tube. It is 30 mm. long 
and the main-tube, of which it formed a part, must have been about 17 mm. in 
diameter. 
A thin, membranous alcyonarian colony, the outer surface of which extends 
in the level of the tips of the distal pinule-rays, covers large tracts of the outer 
dermal surface of the sponge. 
