68 PORIFERA. II. 



growing on pebbles and particles of gravel. Station 113, 69 31' Lat. N., 7 06' Long. W., depth 1309 

 fathoms (bottom temperature -r- i°oC), thirteen specimens; station 119, 67 53' Lat. N., io° 19' Long. W., 

 depth 1010 fathoms (bottom temperature -j-i°oC.), two specimens. Thns also this species is a native 

 of the cold bottom, and it is only known from great depths. Both the stations are situated between 

 Iceland and Jan Mayen. 



Cotylina n. subg. 



Formed like a calyx (or head) on a rather long stalk. The skeleton consists in the stalk of a 

 spicula-axis, in the calyx-wall of more irregular arranged spicules. Spicula: Megasclera styli or sub- 

 tylostyli, often divided into several forms occurring in fixed places in the sponge; microsclera : the cha- 

 racteristic anisochehr palmatce have the aire of the larger end reaching to about the middle of the shaft, 

 the smaller end is somewhat longer than in Lycopodina, of a. similar structure, but elliptical in a trans- 

 verse section: to the chela' may be added forcipes. 



7. A. infundibulum Levins. 

 PI. II, Figs. 20—21. PI. XI, Fig. 9 a — m. 



1874. Esperia cupressiformis Carter, partim, specimen in interclusione commemoratum, Ann. Mag. Nat. 



Hist. Ser. 4 , XIV, 215, PI. XIV, fig. 19 a, b. 

 1885. Esperia bihamatifera Armauer Hansen, partim, the Norwegian North-Atlantic Exp. XIII, Spon- 



giadse, PI. Ill, fig. 6. 

 1887. Esperclla infundibulum Levinsen, Dijmphna Togtets zool.-bot. Udbytte 366, 19, Tab. XXIX, 



Fig. 14, Tab. XXXI, Fig. 17—19. 



Formed like a calyx on a long stalk. The skeleton consists in the stalk of a spicula-axis, in the 

 calyx-wall of less regularly arranged spicules; on the outside of the calyx spicules project. Spicula: 

 Megasclera of three forms, styli or subtylostyli in the axis and the calyx-wall o-ij — 0'8j mm , styli zoith a 

 very long, fine point, projecting on the outside of the calyx 0-44 — o-6""", subtylostyli in the refolded edge 

 of the, calyx 0-149 — 0-22""": microsclera of two forms, the characteristic anisochehr palmata- o-oiS — 0-02^""". 

 forcipes o-oy^""' 1 . 



This species is formed like a calyx placed on a long, thin stalk. The calyx may be somewhat 

 differently shaped; most frequently it has a regular form as a short funnel and with a wide round 

 opening, but sometimes it is highly compressed, so that the two sides are closely joined, and the 

 opening becomes a narrow slit. Of the specimens from the Ingolf-Expedition one is torn off, the 

 other is attached to some sponge-spicules. From the Kara Sea we have it attached to tubes of Pecti- 

 •uaria hyperborca. The largest specimen in hand (from the Kara Sea) is 50"™ high, of which the stalk 

 makes 42 mr "; the compressed calyx is ca. io mm in diameter. The stalk is very thin, 0-5— i mro , a little 

 thicker below than above. The smallest specimen is i4 mm high, and has a very small calyx of a dia- 

 meter of only i-5 mm . The edge of the calyx looks as if it was thickened, but this is owing to the 

 fact that the edge is refolded, and the fold fits closely to the inside. The calyx is of a rather soft con- 



