CCELENTEKA. 



I-ALGYONAEIA. 



By Sydney J. Hickson, M.A., F.R.S., 

 Professor of Zoology in the Victoria University of Manchester. 



(2 Plates.) 



The collection of Alcyonaria does -not present many very remarkable features. The 

 most interesting species is Ceratoisis spicata, which forms an important connecting link 

 between the groups of species formerly separated into the two genera Ceratoisis and 

 Primnoisis. It is quite unlike any species that has hitherto been discovered. 



Primnoella dwergens is an important new discovery, as it exhibits many characters 

 of the genus Caligorgia, and may be regarded as a connecting link between the two 

 genera. 



Clavularia frankliniana and Alcyonium paessleri were found by the ' Southern 

 Cross ' expedition off Franklin Island. It is a remarkable fact that not a single 

 specimen of either of these genera was obtained by the Scottish National Antarctic 

 Expedition. 



Tliouarella antarctica, which was first obtained off the Falkland Islands, appears 

 to be a common species in the Southern Seas. 



The only species of Pennatulida found was Umhellula carpenteri, a species dis- 

 covered by the ' Challenger ' expedition and hitherto found only in the South Polar 

 seas. Only one specimen was obtained, and this was unfortunately destroyed by fire 

 in my laboratory. 



The ' Scotia ' expedition obtained twenty specinaens of Umhellula durissima, but 

 not one other specimen of the Pennatulida. 



FAMILY CLAVULARIIDiE. 



Clavulaeia frankliniana. 

 (Plate II., figs. 20, 21.) 

 Clavularia franMiniam, Eoule, Eep. 'Southern Cross' (1902), p. 290. 



Localities 1.— W.Q., March 21, 1902, 30 yards from ship on Port Quarter. 8 fms. 

 2.— W.Q., March 21, 1902. 10 fathoms. 

 3.— W.Q., March 18, 1902. 10 fathoms. 

 4._-Wr.Q.^ June 15, 1902. 12| fathoms. 

 There are many specimens of this species attached to stones, worm tubes and other 

 foreign objects. I have little doubt they belong to the same species as those described 



2 A 



VOIi. III. 



