.. .. .
r"? ..;. .. .
.. : ...
, ::. .
.. . .
1
\,.'..
. . ~
P
b
Fig. 1. Illustrating the technical terms denoting various parts of bivalve faecal pellets.
1. Ribbon-like faeces:
ac, accessory lateral longitudinal groove, lateral groove, extra longitudinal groove ;
b, bi-cricoidal (section) ; bi, bi-crescentic (section) ; lw, lateral wing, lateral region,
lateral longitudinal flange; llw, left lateral wing; mdr, mid-dorsal ridge or rib,
dorsal ridge, mid-dorsal thickening ; mvg, mid-ventral groove, median longitudinal
groove; rlw, right lateral wing; u, upcurled (edge), upturned (edge) ; t, thickened
2. Rod-like faeces :
c, coarse (texture) ; co, constriction, constricted (rod) ; dg, dorso-lateral groove,
lateral groove ; dr, dorso-lateral ridge or rib : f, fine (texture) ; h, homogeneity (of
material), homogeneous (texture) ; llr, left lateral ridge or rib ; rlg, right lateral
groove, : 1, localization (of material), segregation : sg, spiral groove, c*oiletl groove ;
vg, ventro-lateral groove ; vr, ventro-lat,eral rialge or rib.
3. Oval pellets :
l), boss; f, flattened (end) ; p, pointed (ontl) ; r, ronndutl (end) ; s, sogmenttd (rod),
segment, segmentation ; st, spiral striae, spiral striation.
(edge).