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Genus Tecophora 0. S.
Tecophora semisuberites 0. S.
Tecophora semisuberites, 0. Schmidt, Atl. Spong., Taf. 6, Fig. 2, pag. 50.
This species is represented by numerous specimens, varying
much in size and form, being from 5 to 20 mm in height.
They are ali well preserved, and a few of them attaclied to
stones. The colour is the same as in Swedish specimens; both
spicules and inner structure of the sponge agree well with the
description made by 0. Schmidt, op. cit. The smallest
specimens have only one mammilla, the largest numerous.
Habitat. Baffin Bay, Omenak Bay, west- and east-coast of
Greenland; depth varying from 11G to 410 fathoms.
Genus Polymastia Bow.
Polymastia brevis Bow.
Polymastia brevis, Bowerbank, Mon. Brit. Spong., II, pag. 64, III, Plate 11,
fig. 1—9.
Only two specimens represent this interesting species; one
is attached to a stone, the other to a small shell. Both
specimens are broken. The spicules agree perfectly with the
figures which Bowerbank has given and with those of a
true Polymastia Bow.; but the shape and the structure of
Polymastia brevis Bow. differ so much from other Polymastm Bow.
that I should be inclined to transfer this species to another
genus. 1 believe that Polymastia brevis Bow. is nearly allied. to
the genus Cornultmi Ctr. The spicules, of course, differ much
from those of the species of Cornulum Ctr which Carter has
described. But an outward character may sometimes be of
more importance than a difference of spicules, especially when
the shape is so peculiar as that of Polymastia brevis Bow. and
Cornulum Ctr.
Artemisina suberitoicles Vosmser, very nearly allied to
Suberites Nardo, has anchorate spicules, which are commonly
typica! for tlie genera Esperia, Hastatus and other genera nearly
allied to these. I have not changed the genus-name, beeause
I have not seen Bowerbank’s type-specimen of the species.
Habitat. Between Spitzbergen and Nova Zembla, Lat. 70°
49’, Long. 21° 55’ depth 150 fathoms (25 N. S.).
Bd IV. 28
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