KONGL. SV. VET. AKADEMIENS HANDL. BAND. 19. N:() 6. 



Nassacites Kruger 1823, Gesch. der Urwelt 



Th. 2, 417. -- Machrochilina? 

 Natica Adanson 1757, Senegal., 172. D'Or- 



BIGNY and PiCTET consider that this 



genus is represented in the Silurian 



formation, probably = Platyceras. 

 Naticella Swainson 1840, Malac, 345. There 



are species referred to this genus de- 



scribed from the Silurian and Carbo- 



niferous formations, but probably be- 



longing to other genera. 

 Naticodon De Ryckholt 1852, Mélanges 



paléontologiques, 75, in Mém. Cour. 



Acad. R. d. Sci. de Belgique Ire pt., 



75. Carboniferous. 

 Naticopsis Mac Coy 1844 Synops. Carbo- 



nif. Spec. of Ireland, 33. 

 Natiria De Kon. 1881, Faune Calc. Carbo- 



nif. Belg. II, iii, 5. 

 Nerita L. 1758 S. N. ed. X, 776, N. hali- 



otis Sow. Sil. Syst. = Platyceras. 

 N eritomopsis Waagen 1880, Pal. Ind. XII, 



106. 

 Niso Risso 1826, Hist. IV, 218. Employed 



by De Koningk in Fossiles Pal. de Nouv. 



Galles du Sud 1876, 127, for a Devo- 



nian species. 

 Odontomaria Ferd. Roemee 1876, Leth. 



Geogn. 1 Theil. Taf. 29, f. 10,Devonian. 

 Omphalotrochus Meek 1864, Rept. Geol. Surv. 



California. Palaäont. vol. 1, 16. Rela- 



ted to Oriostoma, not a Pleurotoma- 



rian as De Koningk thinks. 

 Onychochilus Lindström 1884, Silurian Ga- 



stropoda of Gotland, 196. 

 Ophileta Vanuxem 1842, Geol. N. Y. vol. 



III, 36. 

 Oriostoma Munier-Chalmas 1876, Journal 



de Conchyl. vol. XVI, 103. Comprises 



several palseozoic forms which have 



been regarded as Euomphali, without 



being provided with the characteristic 



slit in the aperture. 



Orthoneiiia Meek & W()Rthen 1861, Proc. 



Acad. N. Se. Philad., 146, Carbonife- 

 rous. 

 Orthonychia Hall 1843, Rept. 4th Distr. N. 



Y. Geol. Surv., 172. A division of 



Platyceras. 

 Orthostoma Conrad 1838, Ann. Rep. N. Y., 



119. Perhaps a disjointed Euompha- 



lus, perhaps a Cephalopod. 

 Palceacmcea Hall 1873, 23d Rept. N. Y. 



St. Cab., 242. 

 Palceotrochus Hall 1879, Pal. N. Y. vol. 



V, pt. II, 133. 



PaMla L. 1758, S. N. ed. X, 780. 



Patellostium Waagen 1880, Pal. Ind. XII, 

 131. One of the Bellerophons. 



Phanerotinus Sow. 1844, Min. Conch. vol. 

 VII, 29. A ver}^ interesting form with 

 disjointed whorls, piano-spiral and a 

 large cristate lamina along the dorsal 

 side. Is it related to the alate Pleu- 

 rotomariffi? 



Phasianella Lamk 1804, Ann. du Museum, 

 IV, 295. According to Waagen Pal. 

 Indica XII, 109, Carboniferous. 



Phoriis MoNTFORT 1810, Conch., Syst. II, 158. 

 According to Eudes-Deslongchamps, 

 Bullet. Soc. Linnéenne de Normandie 



VI, 146 there is a Devonian species. 

 Phragmolithes Conrad 1838, Rept. N. Y. 



Geol. Surv., 119. = Cyrtolites. 



Phraginostoma Hall 1861, 14th Rept. N. Y. 

 State Cab., 94. 



Phymatifer De Koningk 1881, Faune II, m, 

 149. Related to Porcellia. 



PileopsishAMK. 1812, »Extrait d'un Cours» etc. 

 according to Herrmannsen Index II, 

 268. Anira. sans Vertebr. 1822, vol. 6, 

 2 p. 16- The fossil species of Lamarck 

 are tertiary, the majority is recent. 



Piiidion Barrande 1865, according to BiGS- 

 BY. Thes. Silur. 161, 168. 



Pithodea De Koningk 1881, Faune II, iii, 88. 



