BIBLIOGRAPHIC LIST OF GENEEA AND SPECIES. 1071 



Ptllodictya expansa Continued. 



Ptilodictya lanceolata var. americana Foerste, Geol. Surv. Ohio, 7, 1895, p. 598, 



pi. 36, figs. 3a-b. 

 Upper Medinan (Br^assfield) : Dayton and Todds Fork, Ohio: Cumberland Gap, 



Tennessee. 

 Plesiotype.Ca,t. No. 43419, U.S.N.M. (Ulrich). 



PTILODICTYA EXPANSA Hall (1883 part). See Phsonopora expansa. 



Ptllodictya expansa emarcescens Foerste. 



Ptilodictya expansa var. emarcescens Foerste, Proc. Boston Soc. Nat. Hist., 24, 



1889, p. 328, pi. 6, fig. 30. 



Pachydictya emarcescens Foerste, Geol. Surv. Ohio, 7, 1895, p. 599, pi. 31, fig. 30. 

 Upper Medinan (Brassfield): Eaton, Ohio. 

 Observation. Probably based on young examples of Ptilodictya expansa Hall. 



Ptilodictya explicans Safford. Not recognized. 



Ptilodictya explicans Safford, Geol. Tennessee, 1869, p. 286 (nom. nud). 

 Stones River: Central Tennessee. 



PTILODICTYA FALCIFORMIS Nicholson. See Escharopora falciformis. 

 PTILODICTYA FAMELICUS Foerste. See Pachydictya? famelica. 

 PTILODICTYA FARCTUS Foerste. See Pachydictya crassa. 

 PTILODICTYA FENESTELLIFORMIS Nicholson. See Pachydictya fenestelliformis. 

 PTILODICTYA FIMBRIATA James. See Phsenopora fimbriata. 



Ptllodictya flagellum Nicholson. 



Ptilodictya flagellum Nicholson, Ann. Mag. Nat. Hist., 4th ser., 15, 1875, p. 179, 

 pi. 14, figs. 3-3b; Pal. Ohio, 2, 1875, p. 262, pi. 25, figs. 4-4b. Lesley, Geol. 

 Surv. Pennsylvania, Rep. P 4, 1889, p. 827, figs. 

 Richmond: Near Lebanon, Ohio (Liberty); Island of Anticosti (Charleton). 



PTILODICTYA FLEXUOSA James. See Stictoporella flexuosa. 

 PTILODICTYA FRAGILIS Billings. See Dicranopora fragilis. ' 



Ptilodictya frondosa Weller. 



Ptilodictya frondosa Weller, Geol. Surv. New Jersey Pal., 3, 1903, p. 224, pi. 



19, figs. 1-4. 

 Helderbergian (Decker Ferry): Two miles south of Tristates, New York. 



Ptilodictya gladiola Billings. 



Ptilodictya gladiola Billings, Cat. Sil. Foss. Anticosti, 1886, p. 10. Bassler, Bull. 



U. S. Nat. Mus., 77, 1911, pp. 114, 115, fig. 43. 



Ptilodictya lanceolata Eichwald (not Goldfuss), Lethsea Ross., 1, 1860, p. 388. 

 Gamachtan and Anticostian: West End Lighthouse, etc., Anticosti. 

 Silurian (Borkholm): Borkholm and Lyckholm, Esthonia, Russia. 

 Plesiotype.C&t. No. 57210, U.S.N.M. 



PTILODICTYA GRAHAMI James. See Arthropora cleavelandi. 

 PTILODICTYA GRANULOSA James. See Rhinidictya parallela. 

 PTILODICTYA HILLI James. See Escharopora hilli. 

 PTILODICTYA INTERNODIA Miller and Dyer. See Dicranopora internodia. 



