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KOHMAN P. ARAKAWA
TABLE I. CLASSIFICATION OF TYPES OF BIVALVE FAECAL PELLETS
ACCORDING TO SITAPE (see Fig. 2)
Pinnidae, Glycymeridae, Carditidae, (?Spondylidae),
Unionidae, Anomiidae
( Anomia)
a. Grooved ribbon
Mytilidae, Ostreidae, Isognomonidae, Pectinidae (Delectopccf e n )
I. OVAL
I A .
11. ROD
ITA.
TTI. RIBBON
1. Ovoid
1
a. Discoid
{
2 . Ellipsoid
i
Mesodesmatidae (C'aecella), Cardiidae (Triguniocardia), Tc.11 inidac, Psammobiidac (Gari),
Lucinidae,Unguilinidae,Xylophaginidae (Xylophaga)
Tellinidae (Macomu), Pholadic'ae
(Burma), Semelidae (Abrina)
Psammobiidae (Soletellina),
Mactridae (Mactra, Raeta),
Semclidae (Ahra, Theora),
Galeommidae (Scintilla),
Erycinida,e (Lasaea)
1 1 . Pellet of indeterminate
The SEPTIBRANCHIA (Cardiomyu,
shape
Plectodon )
a. Disjointed particlrs
Galeommidar (Phlyctaenachlamys)