PLATE 8. 
Fig. 1-3. DoLaBELLA AGASSIZI, sp. nov. 
Fig. 1. A group of seven epithelial cells from the mandibular sulcus region. Only the bas 
portion a, of the cuticular rodlets is shown; f, basal stratum of connective-tissue; b, b, two groups 
muscle-fibres, the freely branching ends of which penetrate the basement-membrane and ramify 4 
the basal ends of the epithelium-cells. In order to follow these branchings the focus has been ch 
slightly in drawing. The longitudinal fibrillation of the cytoplasm of the epithelial cells appe 
continuous beyond their distal ends into the cuticle itself. Celloidin section, Mallory’s connecti 
stain.  X 500. 
Fig. 2. Large subepithelial gland-cell from near base of palatal flap. The epithelium is n 
resented, being stripped off from the basement-membrane, d; the nucleus of the cell does not lie 
the plane of the section. The dilated proximal end of the cell shows clear reticular cytoplasm wi 
deeply staining nodal points. The region 6 is filled with a homogeneous secretion, which exudes from t 
tip of the cell at a, and passes up between the epithelial cells to their free surface. X 500. ; 
Fig. 3. Three epithelial cells from near the bottom of the mandibular sulcus; a, the short 
lar rodlets; f, the basal stratum of compact connective-tissue, through which pass the richly bra 
ends of two muscle-fibres, which terminate in it and between the basal ends of the epithelial 
Fig. 1 and 3 show that a considerable amount of shrinkage has taken place in the epithelium, rh 
has rendered the termination of the muscle-fibres more evident. Hansen’s iron hematoxylin an 
chromotrop 2B. X 500. i 
Fig. 4. DotaseLua HASSELTU (Férussac). 
Fig. 4. Cross-section of the pharyngeal bulb, taken in the region of the mandibles to 
their relations; a, outline of pharyngeal bulb; c, its lumen; m, mandibles, g, mandibular sulcus in 
the rodlets are produced. The plane of this section is slightly posterior to the dotted line indi 
the mandible m, in Fig. 5. 12. 
Fig. 5-7. DoLABELLA AGASSIZI, sp. nov. 
Fig. 5. Semidiagrammatic dorsal view of the interior of the pharyngeal bulb. The bulb has b 
opened by a median dorsal longitudinal incision, and the sides have been reflected; m, the m 
l. f, the palatal folds of the dorsal wall of the bulb, thickly set with the palatal spines; f, a trans 
ridge in the dorsal wall connecting the palatal folds; oe, the oesophageal end of the bulb. The 
is seen in the centre of the organ, its anterior end buried in a deep curved groove. X 3. t 
Fig. 6. A group of the numerous subepithelial gland cells imbedded in the connective-tissue of 
palatal flap, near the free margin. > 500. ‘ 
Fig. 7. Surface view of a portion of the mandible near its posterior border; a, youngest 
b, older ones. X 90, 
