Figure 3
Cellular architecture of the brain of Lineus viridis. a: Azan stained cross section of the brain of L. viridis showing the location of the neuronal somata surrounding the neuropil of the brain. The neuropil within the ventral lobe (vl) and the dorsal lobe (dl) is interspersed with glia sheath (gs). b,c: Higher magnification images demonstrate that the neuronal somata differ in size and can be classified at least in three different types (s1-s3). dct dorsal commissural tract; in inner neurilemma; on outer neurilemma; pn proboscis nerve; pr proboscis; ry rhynchocoel. Scale bars: a = 100 μm; b,c = 20 μm.