Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
Development of Kraithelgum [illegible] flexible
process and wall cell [illegible]
mucin petin
o o
o calcite calcite //
cuboidal
epithelial
-> mucin pectin
//o//
flat epithelium
epithelial cell.
cell flattens & calcification continues.
G. thinks calcif.