LIST OF PLATES. 



I-IX. Illustrations of South American Odonata. Explanations pp. 264-280. 



X. Bodianus stellatus Blosser. 



XI. Chromis marginatus Castelnau. 



XII. Holocanthus lunatus Blosser, and Sphccroides asterias Blosser. 



XIII. Dentition of Telmatherium, Dolichorhinus, and Manteoceras. 



XIV. Skull of Dolichorhinus longiceps Douglass. 



XV. Palatal View of Skull of Dolichorhinus longiceps Douglass. 



XVI. Folding Map of Costa Rica. 



