CONTENTS. ' VII 



Page. 

 Fossil Plakts — Continued. 



Myrica Copraua -i. 411 



Myrica partita 412 



Ulmns teuuinervis 412 



Quercus Elkoana 413 



Diospyros Copeana 414 



Weinmannia rossefolia 415 



Sapiudus angustifolius .* 415 



Sapindns coriaceus 415 



Staphylea acuminata ? 415 



Ilex subdeuticulata 416 



Ilex uudolata '. 416 



Paliurus Florisanti 416 



E}ius(f) drymeja 416 



Ebus Hay denii 417 



Pterocarya Americana 417 



Ctesalpiuia (?) linearis 417 



Acacia septentrionalls ; . . . 418 



Musophyllnm complicatum 418 



Sapiudus obtusifolius 419 



Fossil vertebrates : 



Polyonax mortuarius 451 



Bottosaurus perrugosus , r 452 



Trionys vagans 453 



Plastomenus (?) punctulatus 453 



Plastomenus (?) insignis 454 



Adocus (?) lineolatus 454 



Eobasileus galeatus 456 



Ach£enodon insolens ^ 457 



Pbenacodus j^rimsevus 458 



Orotherium index 459 



Aceratherium mite 493 



Ancbitberium exoletum 496 



Hippotberium paniense 522 



Protobippus labrosus 523 



Fossil mollusks: 



Helicoceras vespertinus 455 



Ancbura bella 455 



Meekia bullata 455 



Ptycboceras aratus 455 



Haploscapba capax 456 



Lepidoptera : Moths : 



Crambus Carpenterellus 548 



Marmopteryx tessellata 552 



Hemileuca Diana 557 



DiPTERA : 



Bibiocepbala graudis 566 



Pseudo-Nkuroptera akd Neuroptera: 



Pteronarcys regularis , 573 



Pterouarcys badia 573 



Dictyopteryx signata ,, 575 



Isogenns elongatus 576 



Isogenus colubrinus 576 



Perla sobria , 577 



Perla ebria 577 



Epbemera compar 578 



Heptagenia brunnea 581 



Leplopblebia pallipes 582 



Diplax atripes 588 



Diplax decisa 588 



Diplax pallipes 589 



Opbiogonipbus severus 591 



Stenoj)bylax gilvipes GOl 



Crustaceans : 



Hyalella dentata 608 



Hyalellaiuermis 609 



Ganiniarus robustus 610 



Acbthores Carpenteri ; 612 



Brancbinecta Coloradoeusis 521 



