Note 476 — Chapter XV · GENERAL NATURAL HISTORY NOTES.

I compared my notes with the description and figures given by Agassiz in his “Contrib. Nat. Hist. U.S.A.” (1862: vols. iii. and iv.). In the Solomon Island species, the dendriform mass resolves itself into 8 principal branches, each ramose, and all united at their bases by a common membrane. The umbrella, which was finely lobed or crenulated at its margin, displayed about 40 radiating canals, each communicating by an anastomosing network with the canal on either side of it.