OF GENERA 
Ptychodesma Hall and Whitfield. 
Rep. N. Y. State Mus. Nat. Hist., xxiv, 
p. 192. tttvktoc, plico ; decpa, vincula. 
1872. Moll., Lamellibr., Arcid. Hall , 
Dalton. 
Ftychogastria Allman. Nares, Narr. 
Yoy. Polar Sea, ii, p. 290. Coel., 
Acal. Lutlcen. 
Ptychcmplialus Agassiz. Sowerby, 
Min. Conch., ed. Germ., 1837, p. 23. 
tttvxw, plica ; optyalog, umbilicus. 1837. 
Moll., Gast. 
Ftychomus Marseul. Abeille, ii, p. 
322. 1865. Col. Waterhouse. 
Ptychomya Agassiz. Etud. Crit., 3. 
ktvxv, plica; mya. 1842. Moll., Biv. 
Ptychophyllum Lonsdale. Sil. Syst. 
Ptyche; phyllon. 1839. Coel., Zoan. 
Ptychophyllum Edwards and Haime. 
Brit. Foss. Cor., i. 1850. Pol., Cya- 
thop. Agassiz. 
Ptychosyca Gabb. Proc. Acad. Nat. Sc. 
Philad. , [3], vi. 1876. Moll., Gast. 
Ptychotrema MOrch. Cat. Yold., p. 33. 
1852. Moll., Gast. 
Ftyctodus Pander. Ctenodipt. Devo- 
nisch. Syst. Ptyktos ; odous. Pisces, 
Sel. 
Ptygmatis Sharpe. Quart. Journ. Geol. 
Soc. Lond., vi, 2, p. 101. 1850. Moll., 
Gast. 
Ptygoderus Gray. Cat. Lizards Brit. 
Mus., p. 216. 1845. Rept. Waterhouse. 
Ptylogyna Schiner. (=Ptilogyna West- 
wood, 1834.) 1868. Dipt., Tip. Ver- 
rall. 
Ptylops Rondani. ( = Ptilops Rondani, 
1857.) 1859. Dipt., Muse., Dex. 
Yerrall. 
Ftyonius Cope. Trans. Amer. Phil. 
Soc. 1874. Batr., Stegoc., Ptyon. 
Cope. 
Ptyonodus Cope. Proc. Amer. Phil. 
Soc., xvi. 1877. Pisces. Dalton. 
Ptyonornis Reichenbach. Aufz. Colib., 
p. 14. 1853. Aves. 
Pugil Fabricius. Fortegn., 1822, p. 84. 
1822. Moll., Gast. 
Pugilis Fabricius. Cat. Cab. Fabr. 
( = Strombus.) 1823. Moll. Agassiz. 
Pugio Schmidt. Mus. Goth. ined. Moller, 
Isis, 1832, p. 130. 1832. Moll., Gast. 
Pugione Stal. Ofv. Yet. Akad. Forh., 
1867, no. 7, p. 521, in table. 1867. 
Hem., Pent. 
IN ZOOLOGY. 287 
Fullata Harris. 1782. Dipt., Bib. Fer- 
rall, Bigot. 
Fullus Mulsant. Col. 
Fulmobranchia D’Orbigny. Yoy. 
Am dr. Mdr. 1835-’43. Moll., Gast. 
Agassiz. 
Fulvinulus Lamarck. Enc. Mdth. 
Fumilio Megerle. Cat. MSS. (=Helix.) 
Moll. Agassiz. 
Puntius Buchanan. Cuv. et Yal., Poiss., 
xvi. Pungti. (Yox Ind.) 1842. 
Pisces, Cyprin. Agassiz. 
Fuparia Rafinesque. Anal. Nat., 1815, 
p. 143. 1815. Moll., Gast. 
Fupillaea (Gray) Krauss. Sudafr. 
Moll., p. 62. 1848. Moll., Gast. 
Pupina Ehrenberg. Symb. Phys. Gast. 
( — Pupa.) 1831. Moll. Agassiz. 
Pupivores Romand. Hym. Agassiz. 
Puppa Montfort. Conch. Syst., ii, p. 
298. 1810. Moll., Gast. 
Fuppigerus Cope. Proc. Amer. Phil. 
Soc., xiv, p. 59; Syn. Ext. Rept. Batr., 
etc., p. 235. 1870. Rept., Test., 
Chelon. Cope, Garman. 
Pupula (Leach) Morch. Cat. Yold., p. 
34. 1852. Moll., Gast. 
Purpurarius Dum£ril. Zool. Anal., 
p. 166. 1806. Moll., Gast. 
Purpurella Dall. Amer. Journ. Conch., 
vii, pt. 2, p. 110. (Subg. ; type P. 
columellaris Lamarck.) 1871. Moll., 
Gast. Dali. 
Puzosia Bayle. Ceph. Amm. 1879. 
Dalton. 
Pyaulus Agassiz. Cat. Rais. Ech. 
nvyfj, anus ; avlog, fistula. 1847. Ech. 
Clyp. Agassiz. 
Pycnaraea Thomson. Scand. Col., i, p. 
37; iii, p. 28. 1859. Col. Water- 
house. 
Pycnarthrum Eichhoff. Stett. ent. 
Zeit., 1878, p. 383; Mdm. Soc. So. 
Lidge, [2], viii, p. 104. 1878. Col., 
Scolyt. 
Pycnochilus Waterhouse. 1879. Col. 
Zool. Jahresb. 
Fycnocraeras Thomson. (Male pro Pyc- 
tocraerus.) Col. 
Pycnoctenus Koch. Arachn. Austral., 
p. 996. nvicvbg, crassus; Krelg, urevog. 
1878. Arachn., Aran. Koch. 
Pycnodonte Fischer Waldheim. Bull. 
Soc. Nat. Moscou, viii, pi. 1. 1835. 
Moll. 
