Figure 5
From: Control of shell pigmentation by secretory tubules in the abalone mantle
Pigment is localised to the prismatic layer. Scale bars = 200 μm. A. SEM of a broken fragment of juvenile shell. A shell ridge (r) is visible. The two main shell layers, the prismatic layer (pr) and the nacreous layer (na) are clearly discernable. B. Light microscopy of a similar shell fragment. Pigment is clearly localised to the upper prismatic layer (pr), while the nacreous layer (na) is unpigmented.