Plate 2. 



Figs. 6-9. Malthopsis spinulosa Garman. 



Fig. 6. The head in tliree quiuter profile. Drawing; natural size; o, doubtful bud-like 

 marginal organs ; te, frontal tentacular i)apilla. 



Fio'. 7. Part of a transverse section of the interior of one of the ventral lobes of the distal 

 tfilobed part of the frontal tentacular papilla. Stained : haematoxylin-picric 

 acid-fuchsin. Drawing, c, connective-tissue septa between the longitudinal 

 chambers; cv, lumina of the glandular tubes; pc, walls of the glandular tubes 

 composed of cylindrical cells. 



Pig. 8. Transverse section of the distal trilobed part of the frontal tentacular papilla. 

 Stained: haematoxylin-picric acid-fuclisin. Photograph, magnified 1 : 41. b, 

 peripheral blood vessels ; b', large central sinuous blood vessel ; c, connective- 

 tissue septa between the longitudinal chambers ; cv, lumina of the glandular 

 tubes ; m, muscles ; p, groups of pigment cells ; pc, walls of the glandular tubes 

 composed of cylindrical cells ; s, longitudinal strands of semicartilaginous tissue. 



Fig. 9. Transverse section of the distal trilobed part of the frontal tentacular papilla. 

 Stained : haematoxylin-picric acid-fuclisin. Drawing, magnified 1 : 41. b, peri- 

 pheral blood vessels ; b', large central sinuous blood vessel ; c, connective-tissue 

 septa between the longitudinal chambers; cv, lumina of the glandular tubes; ra, 

 muscles ; p, groups of pigment cells ; pc, walls of the glandular tubes composed 

 of cylindrical cells ; s, longitudinal strands of semicartilaginous tissue. 



