460 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



PAGE 



Lingulasma, nature of shell substance 150 



Lingulella, classification of 142, 144 



evolution of pi. 11 (pp. 140-141) 



mentioned 7^> 7^ 



acutangiila, compared with Lingulella buttsi 71 



ampla, compared with Obolus {Westonia) notchensis 69 



arguta, stratigraphic position and association 179, 180, 182 



buttsi, new species 70, pi. 8, fig. 6 



compared with Lingulella acutangula 71 



Lingulella ferruginea 71 



desiderata, stratigraphic position and association. ... 176, 177, 192, 194, 



197, 198 



dubia, stratigraphic position and association 183 



ferruginea, compared with Lingulella buttsi 71 



Helena, stratigraphic position and association 198 



isse, stratigraphic position and association. .. .175, 176, 178, 198, 204, 209 



lepis, associated fossils listed 85 



mentioned 85 



manticula, associated fossils listed no 



mentioned no 



stratigraphic position and association 176, 191, 192, 193 



texana, new species 71, pi. 8, fig. 5 



sp. undt., stratigraphic position and association 209 



Lingulella (Leptembolon), classification of 142, 144 



evolution of pi. 11 (pp. 140-141) 



Lingulella (Lingulepis) , classification of 142, 144 



evolution of pi. 11 (pp. 140-141) 



mentioned 72 



Lingulella (Lingulepis) acuminata, compared with the variety scquens. . 72 



stratigraphic position and association 192, 193 



Lingulella {Lingulepis) acuminata sequcns, new variety 72, pi. 8, fig. 4 



compared with Lingulella {Lingulepis) acuminata 72 



Lingulella {Lingulepis) longinervis (Matthew), compared with Obolus 



parvus 61 



Lingulella {Lingulepis) rowei, mentioned 300 



Lingulepis, see Lingulella {Lingulepis). 



Lingulobolus, see Obolus {Lingulobolus) . 



Unguloides, see Davidsonella, Lakhmina, and Triinerella. 



Lingulops, nature of shell substance 150 



Linnarsson, J. G. O., bibliographic references 112-113, 375 



Linnarssonclla, classification of 142, 146 



evolution of pi. n (pp. 140-141) 



mentioned 90 



Linnarssonclla girtyi, compared with Linnarssonella modcsta 91 



compared with Linnarssonclla transversa 92 



Linnarssonella urania 93 



LiiuuirssoncUa niinuta, compared with. Linnarssonclla modcsta 91 



compared with Linnarssonclla nitcns 91 



