Fig. 18. 
Fig. 19. 
Fig. 20. 
Fig. 21. 
Fig. 22. 
Fig. 23. 
Puate 5. 
Figs. 18-20. Macrurus canus Garman, 
The fish seen from the side. Drawing; natural size. 
A radiating dise in transmitted light. Photograph; magnified 1:41. n, main 
dise nerve; p, branched pigment cells. 
A radiating disc in transmitted light. Photograph; magnified 1:17. n, main dise 
nerve; p, branched pigment. cells. 
Figs. 21-23. Myctophum aurolaternatum Garman. 
The fish seen from the side. Drawing; natural size. al, anterior lateral radiating 
organs; ma, mandibular radiating organs; ml, mediolateral radiating organs ; 
op, opercular radiating organs; pe, pectoral radiating organs; pl, posterior 
lateral radiating organs; va, anterior ventroanal radiating organs; ve, ventro- 
caudal radiating organs; ve, ventromedial radiating organs; vp, posterior ven- 
: 
troanal radiating organs. 
The fish seen from below. Drawing; natural size. al, anterior lateral radiating 
organs; ma, mandibular radiating organs; ml, mediolateral radiating organs ; 
op, opercular radiating organs; pe, pectoral radiating organs; pl, posterior 
lateral radiating organs; va, anterior ventroanal radiating organs; ve, ventro- 
iS Ne ) ’ Be ) ’ 
caudal radiating organs; ve, ventromedial radiating organs; vp, posterior 
ventroanal radiating organs, 
Axial section vertical to the median plane of the fish through a posterior lateral 
radiating organ. Stained: haematoxylin-picric acid-fuchsin. Drawing; magni- 
fied 1: 140. b, blood vessels ; c, connective tissue of the interior of the organ; 
‘4 J bi Db ’ 
p, section through the outer horseshoe-shaped pigment cell band; pe, radiating 
cells; pp, internal pigment cell layer; si, scale underlying the radiating organ ; 
8s, scale covering the radiating organ; t, section through the H-shaped thicken- 
ing of the covering scale. 
ce TE 
