Identifying Sponges

Key to California Porifera (Page 027)
( From page 025 B) Microscleres OTHER THAN Arcuate Isochelae ONLY. May include Palmate Isochelae or Anisochelae, Toxas or Raphides, or NO microscleres.
[A] GO TO PAGE 028
Microscleres Palmate Isochelae and Toxas ONLY. Raphides ABSENT.
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[B] GO TO PAGE 32
Microscleres OTHER THAN Palmate Isochelae and Toxa ONLY or NO microscleres other than Rhaphides. Raphides frequently PRESENT but may be ABSENT.
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