Zoology Lab Practical lab 4

trochophore larvae

veliger stage --> settle to bottom to grow into adult bivalves

Mussel in cross section (dorsal on top) with visceral mass (middle), foot (bottom), and gills (right)

Gill section of a mussel

Glochidia in fish gills, c.s.

snail radula

Giant Pacific Cryptochiton (class Polyplacophora)

Class Scaphopoda (Tusk shells)

Razor clams and shell - dig into substrate

Scallops (Class Bivalvia)

Clam anatomy plastimount

Freshwater mussel shells (Class Bivalvia)

Garden slug (genus Limax, Class Gastropoda)

Whelk egg case (Glass Gastropoda)

limpets (Class Gastropoda)

squid plasti-mount (Class Cephalopoda)

nautilus shell (Class Cephalopoda)

Ram's horn (Helisoma) snails

Nassarius sp. snails (marine snails)

nudibranch

lingula

terebratella