ART. 12 



HEXACTINELLID SPONGES — OKADA 



31 



obtained from a depth of 229 fathoms, southeast of Shimushir Island, 

 Kuriles, at Station 4804. The irregular, largely expanded colony at- 

 tains a height of 18 mm ; its greatest width is about 75 mm. Unfortu- 

 nately the outermost ends of the tubes are broken off for a greater or 

 lesser distance. The diameter of imperfect tubes is usually 8 mm ; the 

 outer margin seems somewhat flared outward and backward in form- 

 ing an approximately circular oscular opening with a diameter of 



FiGcuE 4. — Farrea kurilensis, new species : a. Dermal pentactin ; b, circular um- 

 bellate clavulae ; c, anchorate hooked clavulae (form A); d, anchorate hooked 

 clavulae (form B) ; e, anchorate hooked clavulae (form A) ; f, anchorate hooked 

 clavulae (form B) ; y, discohexaster ; h, discohexaster, i, oxyhexaster ; ;, 

 oxyhexactin ; k, oxyhexactin. All X 250 



about 10 mm. The entire extended colony was attached on a plate 

 of cirripeds by the entire base and not predominantly erect nor at- 

 tached by special short or long peduncles as are other members of 

 this genus. Whether the dichotomous division of the single tubular 

 ends takes place is doubtful, as the outer margins of the tubes are 

 damaged and imperfectly preserved. The dichotomous ramification 

 begins at a very early stage at irregular intervals, resulting not in a 

 long straight main trunk, but in an irregular twisted system of 

 tubes, spreading in all directions, especially transversely. 



