u 



54 - THE VOYAGE OF H.M.S. CHALLENGER. ; 



V. CERIANTHEiE. 



Family IS, Cerianthid^. 

 Genus Cerianthus, Delle Chiaje. 



Cerianthus memhranaceus, Spall. 



Habitat. — Zebu, Philippine Islands, on the reefs. 



Dimensions. — Length, in a contracted condition, 4'5-10'0 cm.; breadth, l-5-l"8 

 cm. Two specimens. 



UNDETEEMINED SPECIMENS. 



1. Station 153, in the Antarctic Ocean, February 14, 1876 ; 1675 fathoms. 



An Actinian, nearly as thin as paper, strongly contracted and folded together, 

 1'5 cm. in size. 



2. Station 173, off Matuku, Fiji Islands, July 24, 1874; 310-315 fathoms. 



An Actinian, firmly fixed on a Gastropod shell (probably an Adamsia). 



3. Station 195, off Banda, October 3, 1874; 1425 fathoms. 



An Actinian, about 5 cm. long, very rotten. 



4. Station 209, off Zebu, Philippine Islands. 



An Actinian, 4 mm. broad, 2 mm. high, sessile, strongly contracted. 



5. Zebu, 100 fathoms. 



An Actinian, 6 '0 mm. broad, 2 mm. high, of the usual structure ; 12 complete 

 pairs of mesenteries, two directives, 36 ( = 12 + 24) small pairs. 



6. Station 219, North of Papua, March 10, 1875 ; 150 fathoms. 



One small Actinian, 1-5 cm. high, 1'5 cm. broad, slightly contracted (probably 

 no sphincter), about 30 short, plump, sack-like tentacles. Preservation 

 inadequate for study. 



7. Station 244, North Pacific, East of Japan, June 28, 1875 ; 2900 fathoms. 



One Actinian, 12 mm. broad, 3 mm. high, very strongly contracted. 



8. Station 286, South Pacific, between Tahiti and Valparaiso, October 16, 1875; 



2335 fathoms. 

 An Actinian, 1-4 cm. broad, 0-4 cm. high, probably a Phellia. 



9. Station 299, off Valparaiso ; 2160 fathoms. 



Actinian adhering to a Dentalium; one elongated specimen (3 "5 cm.), flattened 

 by contraction, in shape recalling the Amphianthidse. 



