2 E. KIEKPATEICK. 



I.-HEXACTINELLIDA. 



(7 Plates.) 



THE Hexactinellid Sponges, comprising thirty-four specimens and sixteen macerated 

 fragments, all belong to one Family, the Rossdlidse. 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.E, F. E. SOHULZE. 

 (SUB-FAMILY ROSSELLIN.E, F. E. Schulze.) 



1. Hyalascus hodgsoni. Off Mount Terror, 914 metres (500 fathoms). 



2. Rossella antarctira Carter. W.Q., 238 m. (130 fins.). 



3. Rossella podayrosa. W.Q., 18-55 m. (10-30 fms.). 



4. Rossella racovitzw Topsent. W.Q., 18-3(1 m. (10-20 fins.). 



5. Rossellu Itexactinophila. Antarctic Circle, Long. 155 21' E., 404 in. (254 fms.). 



6. Aulorossella piloxa. Off Coalman Island, 183 m. (100 fms.). 



7. Aulorossella levis. W.Q., 18-325 m. (10-178 fms.). 



8. Auloronsella kngstaffi. W.Q., 238 m. (130 fms.). 



0. Anaulosoma schuhii. W.Q., 30-75 m., (20-11 fms.). 



SUB-FAMILY LANUGINELLIN.E, F. E. Schulze. 

 10. Anoxycalyx ijimai. W.Q., 329 m. (180 fms.). 



Two species in the above list have been described before : one of these, Rossella 

 untarctica 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, Rossdla racovitzse Topsent (11, p. 33), was obtained in 

 1897-99 by the ' Belgica ' from Lat, 70-71 S., 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 S., Long. 80-89 W., added the following nine :- 



1. ? GauloplutC'iis sp. 450 in. (240 fms.). 



2. Rossella nuda Topsent. 430 m. (235 fuis.). 



3. Rossella racovitzw Topsent. 45(i-5(jl) m. (240-311 fms.). 



4. Bathydorus spinosus F. E. Schulze. 50'J m. (311 fms.); also from Penguin Island, 2920 m. 



(1GOO fms.) ['Challenger']. 



5. Rhahlocalyptus at/straits Topsent. 450 m. 

 (i. Fnrrea occa (Bowerbank) Carter. 450 in. 



7. Eurele yerlachei Topsent. 450-550 m. (240-301 fms.). 

 s. Chonelasma sp. 45o-5on m. (240-273 fms.). 



9. Uncinatera plicata Topsunt. 430-50(i m. (235-273 fms.). 



All of the eighteen Antarctic species belong to the Hexastcrophora, 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 walcr, from depths ranging from 18-75 m. (10-41 fms.). 



