Fig. 4 in Comparative 3D microanatomy and histology of the eyes and central nervous systems in coleoid cephalopod hatchlings

Fig. 4 Comparative retina histology (ventral portion; transversal sections at the level of lens centers). a Sepia officinalis (Richardson), b Rossia macrosoma (Trichrome de Masson), c Sepietta obscura (Trichrome de Masson), d Idiosepius notoides (Richardson), e Loligo vulgaris (Richardson), f Octopus vulgaris (Azan). Labels: bsm=basal membrane, ds=distal segments of photoreptors, ps=proximal segments of photoreceptors, rp=retinal plexus, scn=supporting cell nuclei, arrowheads peripherically thickened eye cartilage