1. Mollusca

2. Basic Body Plan Muscular foot Gills Mantle – may secrete a shell Visceral mass Many have a scraping Radula Trochophore larvae

3. Molluscan Body Plan

5. Molluscan Classes Amphineurea (Polyplacophora) – Chitons Bivalvia (Pelecypoda) Cepahlopoda Gastropoda Phylum also include rarer classes (not covered in lab) Monoplacophora Scaphopoda

6. Mollusca Evolution

7. Chitons Eight Plates hinged together underneath skin Dorsally flattened Scrape algae off rocks with radula Marine

10. Gumboot Chiton

12. Bivalvia Mantle split in two- making two hinged shells Suspension feeders Incurrent- excurrent siphons bring water in /out Gills and palps collect and move particles to mouth

13. Fresh water Larvae- Glochidia #44

14. Clam Anatomy

16. Intestine Heart Mantle Visceral mass Gills Foot #41

18. Clam Gill # 42

20. Radula #40

23. Clam Dissection Gills

25. Incurrent Siphon Excurrent Siphon

27. Heart- Open Circ. System Pericardial cavity (Ceolom)

29. Cephalopoda

37. Gastropoda