448 FOR I STEINS PONG 
The large equianchorate spicules (Plate 25, fig. 5). These spi- 
cules are very like those of the preceding species; the length 
ISA 0,07 mm. 
The small equianchorate spicules (Plate 25, fig. 6). "The length 
of these spicules is only 0,025 mm. 
Colour. ''"Phe- colour is Tiohtiwith a tint of yellow: 
Habitat. Baffin Bay, depth 169 fathoms. 
Genus Esperia Nardo sens. lat. Fristedt. 
Esperia nigricans Bow. (Vosmeer). 
Halichondria migricans, Bow., Mon. Brit. Spong., II, pag. 266, III, plate 45, 
fig. 25—31. 
Ksperia nigricans, Vosmer, Notes Leyvd. Mus., pag. 144. 
'The most common shape of this sponge is that of a förm- 
less mass, but specimens from the expedition to Greenland 
in the year 1883 are ventilabriform, like those of Phakellia ro- 
busta Bow. "The length of the largest specimen is 120 mm, 
the breadth 95 mm and the thickness 6 mm. This example 
is broken at the margins, being: only å fragment of arlaroe 
specimen. The others are thicker, inerusting shells. 'Phe colour 
of the sponge is dark, when preserved in spirit. 
Habitat. North from Spitzbergen, Lat. 79? 47. NEO Sm 
15' E., depth 100 fathoms (288 5p.); Greenland, Tab. ,20:03550mNE 
Long, Aa 20, Wo; depth rt205fathoms (54055); 
Esperia Pattersoni Bow. (Vosmer). 
Halichondria Patterson, Bowerbank, Mon. Brit. Spong., IT, pag. 225, IT, 
Plate 46, fig. 1—06. 
Esperia Pattersomi, Vosmer, Sponges Leyd. Mus., pag. 144. 
The specimens, representing this species, agree well with 
Bowerbank's description and figures, in form as well as to 
inner structure. The surface is corrugated; the consisteney 
