PLATE 2. 
Figs. 6-9. Malthopsis spinulosa Garman. 
too) 
. 6. The head in three quarter profile. Drawing; natural size; 0, doubtful bud-like 
marginal organs; te, frontal tentacular papilla, 
7. Part of a transverse section of the interior of one of the ventral lobes of the distal 
trilobed part of the frontal tentacular papilla. Stained: haematoxylin-picric 
acid-fuchsin. Drawing. ¢, connective-tissue septa between the longitudinal 
chambers; cv, lumina of the glandular tubes; pe, walls of the glandular tubes 
composed of cylindrical cells. 
8. Transverse section of the distal trilobed part of the frontal tentacular papilla. 
Stained: haematoxylin-picric acid-fuchsin. Photograph, magnified 1: 41. b, 
peripheral blood vessels; b/, large central sinuous blood vessel; ¢, connective- 
tissue septa between the longitudinal chambers; cv, lumina of the glandular 
tubes; m, muscles; p, groups of pigment cells; pe, walls of the glandular tubes 
composed of cylindrical cells ; s, longitudinal strands of semicartilaginous tissue. 
. 9. Transverse section of the distal trilobed part of the frontal tentacular papilla. 
Stained : haematoxylin-picric acid-fuchsin. Drawing, magnified 1:41. b, peri- 
pheral blood vessels; b’, large central sinuous blood vessel; c, connective-tissue 
septa between the longitudinal chambers; cy, lumina of the glandular tubes; m, 
muscles; p, groups of pigment cells; pe, walls of the glandular tubes composed 
of cylindrical cells; s, longitudinal strands of semicartilaginous tissue. 
