CHAP. III. ] THE CRUISES OF THE ‘ PORCUPINE,” LES 
and this he associates with Suderites, Tethya greatly 
restricted, and one or two other generic groups, to 
form a family, the Suberitidinz, a part of the old 
order Corticate, which order he now proposes to 
dismember. I doubt if this arrangement will hold 
good, for the silicious sponges whose skeleton con- 
sists mainly of radiating sheaves of long spicules, 
form a conspicuous and natural assemblage. S*ylo- 
cordyla is evidently nearly related in habit and 
general character to the Mediterranean stalked 
sponge figured by Schmidt under the name of 
Tetilla euplocamos.' 
Foraminifera are not very abundant in the cold 
area, though here and there in isolated patches 
large numbers of large and remarkable forms came 
up on the ‘ hempen tangles,’ These were principally 
of the Arenaceus type. On one occasion, at Station 
51, one of the intermediate dredgings between the 
warm area and the cold, the tangles brought up 
a multitude of tubes three-quarters of an inch to 
an inch long, composed of sand-grains cemented 
together, and with a slight appearance externally of 
beading, as if they were divided into. segments. 
During the ‘ Lightning’ excursion the year before, 
on the middle bank along with the specimens of 
Terebratula cranium, we had found in abundance a 
sandy Lifwola with very much the same appearance, 
except that at one end the ZLitwole had a promi- 
nent mouth, and on breaking them open this 
mouth was repeated, definitely moulded of peculiarly 
1 Die Spongien der Kiiste von Algier. Von Dr. Oscar Schmidt, 
Professor der Zoologie und vergleichenden Anatomie, Director des 
Landschaftlichen zoologischen Museums zu Gratz. Leipzig, 1868. 
ie 2 
