Note 18 — Chapter VII · AUSTRALIA; NEW ZEALAND; CAPE OF GOOD HOPE.
Reading edition
For ample details on this formation consult Dr. Fitton’s “Appendix to Captain King’s Voyage.” Dr. Fitton is inclined to attribute a concretionary origin to the branching bodies: I may remark, that I have seen in beds of sand in La Plata cylindrical stems which no doubt thus originated; but they differed much in appearance from these at Bald Head, and the other places above specified.