Plate 9. 



Figs. 43-46, Chauliodus barbatus Garman, 



Fig. 43. Axial section vertical to the median plane of the fish through a regular simple 

 radiating organ with pigment sheath. Stained : haematoxylin-picric acid-fuchsiu. 

 Drawing; magnified 1 : 280. c, connective-tissue membrane forming the cover- 

 ing of the mass of radiating cells on the outer side ; h, outer apparent!}' struct- 

 ureless covering of organ; 1, central mass of polyedrical cells; m, granular 

 protoplasmic mass at the base of the organ ; p, pigment sheatli ; pc, peripheral 

 cylindrical radiating cells. 



Fig. 44. Axial section vertical to the median plane of the fish througli an irregular simple 

 radiating organ with pigment sheath. Stained : haematoxylin-picric acid-fuchsin. 

 Drawing ; magnified 1 : 280. c, connective-tissue meml)rane forming the cover- 

 ing of the mass of radiating cells on the outer side; h, outer, apparently 

 structureless covering of organ ; 1, central mass of polyedrical cells ; m, gran- 

 ular protoplasmatic mass at tlie base of the organ ; p, pigment sheath ; pc, 

 peripheral cylindrical radiating cells. 



Fig. 45, Axial section vertical to tlie median plane of the fish through a medial lateral 

 compound radiating organ. Stained: haematoxylin-picric acid-fuchsin. Draw- 

 ing; magnified 1: 140. A, proximal spherical part of the organ; a, mass of 

 small cells in the central portion of the proximal spherical part of the organ ; C, 

 constriction between the proximal and distal parts of the organ ; c, connective- 

 tissue capsule within the pigment sheath ; D, distal paj-aboloidal part of the 

 organ ; d, gelatinous connective tissue occupying the distal part of the organ ; 

 f, cells in the facets of the outer region ; i, inner region ; 1, cells composing 

 the middle region ; m, middle region ; o, outer region ; p, pigment sheath ; pc, 

 large conic cells of the inner region ; r, reflecting layer. 



Fig. 46. Transverse section through the centre of the proximal spherical part of a medial 

 lateral compound radiating organ. Stained : haematoxylin-picric acid-fuchsin. 

 Drawing; magnified 1 : 340. a, mass of small cells in the central portion of the 

 proximal spherical part of the organ ; b, blood vessels extending radially to 

 the centre of the sphere; c, connective-tissue capsule; nu, nucleus of the conic 

 cells; p, pigment sheath; ph, proximal only slightlj' stainable part of the 

 conic cells; pt, peripheral highly stainable part of the conic cells. 



