INDEX. 159 



PAGE 



FaVOSITES ig 



" favosus 21 



" Ni^arensis 23 



" hispidus 23 



" venustus 23 



" Hisingeri 23 



" obliquus 24 



" p3-riformis 25 



" spongilla 25 



" hemisphericus 25 



" turbinatus 25 



" Emmonsii 27 



" Hamiltonensis 28 



" epidermatus 29 



" Canadensis 23 



" tuberosus 31 



" Winchelli 32 



" radiatus 33 



" nitella 33 



" maximus 74 



" placenta 34 



' ' Billingsii 29 



" radiciformis 34 



" limitaris 36 



" clausus 37 



" intertextus 38 



" digitatus 39 



Halysitin^ 77 



Halysites 77 



" catenulata. . . 77 



" compactus 79 



Heliophyllum 99 



houghtonia 18 



" Huronica 18 



Heliolites 10 



" megastoma 11 



' ' pyriformis 11 



" interstinctus 12 



" subtubulatus 13 



LiMARIA 44 



' ' raraulosa 44 



' ' laminata 45 



' ' crassa 45 



" verticillata 45 



Lyellia 15 



" Americana 15 



" papillata 16 



" decipiens 17 



" parvituba 17 



LlTHOSTROTION Ill 



" mamillare iil 



25 



