bo 
R. KIRKPATRICK. 
I.—-HEXACTINELUIDA. 
(7 Plates.) 
Tue Hexactinellid Sponges, comprising thirty-four specimens and sixteen macerated 
fracments, all belong to one Family, the J?ossellide. The specimens represent five 
genera, of which three are new, and ten species, of which eight have not been described 
before. The following is a list of species with depths and localities :— 
FAMILY ROSSELLID, F. E. Scuvuze. 
(Sus-Famity RosseLiin#, F. E. Schulze.) 
Hyalascus hodgsoni. Off Mount Terror, 914 metres (500 fathoms). 
Rossella antarctica Carter. W.Q., 238 m. (130 fms.). 
Rossella podagrosa, W.Q., 18-55 m. (10-30 fms.). 
Rossella racovitze Topsent. W.Q., 18-86 m. (10-20 fms.). 
Rossella heaactinophila. Antarctic Circle, Long. 155° 21' H., 464 m. (254 fms.). 
6. Aulorossella pilosa. Off Coulman Island, 183 m. (100 fms.). 
7. Aulorossella levis. W.Q., 18-325 m. (10-178 fms.). 
8. Aulorossella longstafi. W.Q., 238 m. (130 fms.). 
9. Anaulosoma schulzii. W.Q., 36-75 m., (20-41 fms.). 
om oF to Fe 
Sup-Famity LANUGINELLINe, F. E. Schulze. 
10. Anorycalyx timai. W.Q., 329 m. (180 fms.). 
Two species in the above list have been described before: one of these, Rossella 
antarctica Carter (2, p. 114), was dredged by Sir James Clark Ross in Lat. 74° 30'S. 
Long. 75° E., 549 m. (300 fms.), during the voyage of discovery to the Antarctic 
Regions in 1839-43; the other, Rossella racovitze Topsent (11, p. 33), was obtained in 
1897-99 by the ‘ Belgica’ from Lat. 70°-71° 8. Long. 80°-87° W., 450-569 m. 
(267-310 fms.). 
To the one species previously known from the Antarctic, the ‘ Belgica,’ dredging 
in Lat. 70°-71° 8., Long. 80°-89° W., added the following nine :— 
? Caulophacus sp. 450 m. (246 fms.). 
Rossella nuda Topsent. 430 m. (235 fms.). 
. Rossella racovitze Topsent. 450-569 m. (246-811 fms.). 
Bathydorus spinosus F, EB. Schulze. 569 m. (311 fms.); also from Penguin Island, 2926 m. 
(1600 fms.) [‘ Challenger ’). 
H= oo bo et 
5. Rhabdocalyptus australis Topsent. 450 m. 
6. Farrea occa (Bowerbank) Carter. 450 m. 
7. Eurete gerlachei Topsent. 450-550 m. (246-301 fms.). 
8. Chonelasma sp. 450-500 m. (246-273 fms.). 
9. Uncinatera plicata Topsent. 430-500 m. (235-273 fms.). 
All of the eighteen Antarctic species belong to the Hexasterophora, not one 
representative of the Amphidiscophora having been found hitherto. 
In connection with bathymetrical distribution it is interesting to note that 
specimens of four of the species obtained by the ‘ Discovery ’ come from comparatively 
shallow water, from depths ranging from 18-75 m. (10-41 fms.). 
