PLATE 10. 



Fig. 1-10. DoL..\BELL.\ AQASSIZI, sp. nov. 



Fig. 1. Outline of the gastric armature. The stomach has been slit lengthwise and opened out 

 flat; a, posterior end of oesophagus; 6, the sUghtly marked ingluvies; c, the first triturating stomach 

 with the outUnes of the bases of the gastric teeth; d, the second triturating stomach, larger and thinner 

 walled than the preceding, the basal outlines of the very numerous but minute teeth not being 

 apparent in this magnification. 



Fig. 2. o, one of the medium sized gastric teeth seen in side view; h, the same from above, the 

 four sided pyramidal form being well marked. X 6. 



Fig. .3. Two of the small conical gastric teeth from the anterior portion of the first triturating 

 stomach. X 6. 



Fig. 4. a, one of the more compressed gastric teeth from the front part of the first triturating 

 stomach; b, the same tooth from above. X 6. 



Fig. 5. One of the largest gastric teeth seen from the side and below. X 6. 



Fig. 6. Tliree of the numerous small conical teeth characteristic of the second triturating stomach. 

 X6. 



Fig. 7. Epithelium-cells from just beyond the base of the palatal fold on the dorsal side of the 

 buccal cavity. Drop-like secretion products are seen passing out from the distal ends of the cells 

 and gradually merging into the common cuticle; c, outer border of the cuticle. X 500. 



Fig. 8. A medium sized gastric tooth from the first triturating stomach in side view. X 6. 



Fig. 9. A slender palatal spine from the basal region of the palatal fold; e, epithelium; c, surface 

 of cuticle; 6, basal or matrix-cell of the spine. X 6. 



Fig. 10. The gastric tooth of Fig. 8 above, but here shown in surface view. X 6. 



