Fig. 05. Clyjicafitcr reUculatuH L. Adoral part of tlie pyramid seen late- 

 rally, the sheet which serves for tlie attachment of the inter-pyra- 

 midal inuscles being removed in order to show the regular final ra- 

 mifications of the lamels, their irregularity at the triangulär area, 

 and in the very short interiör wing. Compare Pl. VII, fig. 52, 59. 



Fig. GG. Half-pyramid, vertical section i'ectaugular to the symphysis, at about 

 ' 3 from the dental slide, showing the compact corpus, the lamels 

 and the rachis. 



Fig. G7. The texture at X fig. G(), magnified. 



Fig. 68. Part of the same more magnified. 



Fig. 69. The reticulated texture of a lamel, seeu from its side, tlie rods pa- 

 rallel to its up])er margin. 



Fig. Ii). Section in tlie line A B fig. GG, seen from above. 



Fig. 71. Part of a lamel with its final ramifications, seen sidewise obliquely 

 and somewhat from behind. 



Fig. 72. A branchlet, by means of its ultimate ramification forming the inter- 

 muscular sheet. 



Fig. 7y. Aradmoidcs Placenta L. The dental system, side view, the pyra- 

 mids 3 and 4, and the greater part of the 5 a being removed. From 

 a dried specimen. 



Fig. 74. The half-pyramid 4 a to show the form of the symphysis. the al- 

 veolar cavity, the rhachis. The tootli is drawn as if transparent 



Fig. 75. The pyramid 4, dorsal aspect. 



Fig. 76. The pyramid 5, ventral aspect. 



Fig. 77. A rotula. 



Fig. 78. The mouth with the ends of the teeth. 



Fig. 79. Arachnoides Zelandioe Gray. Adoral part of a pyramid seen late- 

 rally, the inter-muscular sheet being removed. 



Fig. 80. Encope emarginata Leske. The dental system, side view, the 

 pyramids o and 4 Avith the greater part of the 5 a having been 

 removed. 



Fig. 81. The pyramid 4, dorsal aspect. 



Fig. 82. The pyramid 5, ventral aspect. 



Fig. 83. The half-pyramid 4 a, showing the area of the sj^mphysis, the al- 

 veole, the supra-alveolar process. The tooth drawn as if transparent. 



Fig. 84. Side vieAv of the halfpyramid 3 a, the intermuscular sheet being 

 removed. 



Fig. 85. A rotula. 



