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THE VOYAGE OF H.M.S. CHALLENGER. 
II. Microscleres. 6. Sterraster. 7. Oxyaster, rays minutely spined. 8. Spheraster. 
Colour. — Faint yellow. 
Habitat.— Lai. 71° 12' N., long. 20° 31' E. ; near Hammerfest ; depth, 135 fathoms, 
Isops phlegrsBi, Sollas (?). 
Isops sphasroides, Vosmaer, Spong. “ WiUem Barents,” p. 13, pi. i. figs. 10, 11, pi. ii. figs. 27, 
28, 39-49 j pi. iv. fig. 116, 1882. 
Sponge. — Spherical ; surface hispid ; cortex thick. 
Spicules. — I. Megascleres. 1. Oxea. 2, Dichotriaene and Orthotriaene. 3. Anatriaene. 
II. Microscleres. 4. Sterraster. 5. Oxyaster. 6. Spheraster. 
Colour. — Pale yellowish tint. 
Habitat. — Lat. 71° 12' N., long. 20° 30 E. ; near Hammerfest; depth, 135 fathoms. 
Isops gloha (0. Schmidt). 
Geodia glohus, O. Schmidt, Spong. Atlant. Gehiet., p. 69, 1870. 
Isops gloha, Vosmaer, Spong. “Willem Barents,” p. 18, 1882. 
Sponge . — Spherical; up to 15 mm. in diameter. Cortex 0*3 to 1 mm. in thickness. 
Spicules . — I. Megascleres. 1. Oxea, 4'1 by 0'038 mm, 2. Dichotriaene, protocladi 
0‘178 mm., deuterocladi 0*35 mm. long. 3. Anatriaene, chord 0’142 mm. 
II. Microscleres. 4. Sterraster, 0'082 mm. in diameter. 5. Aster, 0'057 in 
diameter. 
Habitat . — Portugal. 
Remarhs . — Schmidt’s description is inadequate. The measurements of spicules were 
obtained from a type-slide in the British Museum. Schmidt makes mention of the 
presence of tylostyles with long tylotes ; these are probably foreign to the sponge. 
Section Monotriaena. 
l 
Isops (?) apiarium, 0. Schmidt. 
Caminus apiarium, O. Schmidt, Spong, Atlant, Gehiet., p, 71, pi, vi. fig. 14, 1870. 
Sponge. — Cylindrical, rounded above, beehive-like. Oscules eight to ten in number, 
each situated on the summit of a little papilla-like elevation. Cortex 1 mm. in thickness, 
chiefly composed of the sterrastral layer. 
Spicules. — I. Megascleres. 1. Strongyle, cylindrical, 1*42 by 0'316 mm. 2. 
Triaenes (?). 
