520 



ANNELIDA. 



[PLA. SCO. 



crossing itself, without order, surface 

 smooth. Type P. minor, 

 marina, Emmons, 1844, (Gordia marina,) 

 p. 68, and Am. Geol., p. 103, Up. Taconic. 

 prima, Whitfield, 1877, Prelim, Rept. Pal. 

 Black Hills, p. 7, and Geol. Black Hills 

 of Dakota, p. 331, Potsdam Gr. 

 tenuis, Fitch, 1849, (Helminthoidichnites 

 tenuis,) Trans. Agr. Soc., and Am. Geol., 

 p. 103, Up. Taconic. 



PLANOLITES, Nicholson, 1873, Proc. Roy. 

 Soc., No. 144. [Ety. pianos, wanderer; 

 lithos, stone.] Irregularly cylindrical, 

 tortuous casts of supposed worm-tubes. 

 Type P. vulgaris. 



vulgaris, Nicholson, 1873, Proc. Roy. Soc., 

 No. 144, and Pal. Prov. of Ontario, p. 

 42, Clinton Gr. 



POLYGNATHUS, Hinde, 1879, Quar. Jour. Geo. 

 Soc. Lond., vol. 35, p. 361. [Ety. polys, 

 many ; gnathos, jaw.] Minute variously 

 formed teeth and minute tuberculated 

 plates. Type P. dubius. 

 coronatus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 365, Ham. Gr. 

 crassus, Hinde, 1879, Quar. Jour. Geo. Soc. 



Lond., vol. 35, p. 365, Ham. Gr. 

 cristatus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 366, Ham. Gr. 

 curvatus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 366, Ham. Gr. 

 dubius, Hinde, 1879, Quar. Jour. Geo. Soc. 



Lond., vol. 35, p. 362, Ham. Gr. 

 duplicatus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 364, Ham. Gr. 

 eriensis, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 366, Ham. Gr. 

 immersus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 364, Ham. Gr. 

 linguiformis, Hinde, 1879, Quar. Jour. 

 Geo. Soc. Lond., vol. 35, p. 367, Ham. Gr. 

 nasutus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 364, Ham. Gr. 

 palmatus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 367 r Ham. Gr. 

 pennatus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 366, Ham. Gr. 

 princeps, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 365, Ham. Gr. 

 punctatus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 367, Ham. Gr. 

 radiatus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 364, Ham. Gr. 

 serratus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 365, Ham. Gr. 

 simplex, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 367, Ham. Gr. 

 solidus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 365, Ham. Gr. 

 truncatus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 366, Ham. Gr. 

 tuberculatus, Hinde, 1879, Quar. Jour. 

 Geo. Soc. Lond., vol. 35, p. 366, 

 Ham. Gr. 



PRIONIODUS, Pander, 1856, Monogr. d. Foss. 

 Fieche d. Silur. Syst., p. 28. [Ety. pri- 

 onion, small eaw ; odous, tooth.] Basal 

 portion narrow supporting numerous, 

 delicate denticles and an elongated 



tapering tooth which extends below 

 the basal portion. Type P. elegans. 

 abbreviatus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 359, Ham. Gr. 

 acicularis, Hinde, 1879, Quar. Jour. Geo. 



Soc., Lond., vol. 35, p. 360, Ham. Gr. 

 alatus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 361, Ham. Gr. 

 angulatus, Hinde, 1879, Quar. Jour. Geo. 

 Soc. Lond., vol. 35, p. 360, Waverly Gr. 

 armatus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 360, Ham. Gr. 

 clavatus, Hinde, 1879, Quar. Jour. Geo. 



Soc., vol. 35, p. 360. Ham. Gr. 

 elegans. Pander, 1856, Monogr. d. Foss. 

 Fieche d. Silur. Syst., p. 29, Hud. Riv.Gr. 

 erraticus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 359, Ham. Gr. 

 furcatus, Hinde, 1879, Quar. Jour. Geo. 

 Soc. Lond., vol. 35, p. 358, Hud. Riv. Gr. 

 panderi, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 361, Ham. Gr. 



politus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 358, Hud. Riv. Gr. 



radicans, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 356, Hud. Riv. Gr. 



spicatus, Hinde, 1879, Quar. Jour. Geo. 



Soc. Lond., vol. 35, p. 361, Ham. Gr. 

 PROTOSCOLEX, Ulrich, 1878, Jour. Gin. Soc. 

 Nat. Hist., vol. 1, p. 89. [Ety. protos, 

 first; skolex, worm.] Long, slender, nu- 

 merous segments, both ends obtusely 

 pointed. Type P. covingtonensis. 

 covingtonensis,Ulrich, 1878, Jour. Gin. Soc. 

 Nat. Hist,, vol. 1, p. 89, Utica Slate Gr. 

 ornatus, Ulrich, 1878, Jour. 

 Gin. Soc. Nat. Hist., vol. 

 1, p. 90, Utica Slate Gr. 

 simplex, Ulrich, 1878, Jour. 

 Cin. Soc., Nat, Hist,, vol. 

 1, p. 91, Utica Slate Gr. 

 tenuis, Ulrich, 1878, Jour. 

 Cin. Soc. Nat. Hist., vol. 

 1, p. 90, Utica Slate Gr. 

 SALTERELLA, Billings, 1861, 

 Pal. Foss., vol. 1, p. 17. 

 [Ety. proper name.] 

 Small, slender, elongate, FlQ . 94!. _ Proto . 

 conical tubes, consisting scolex orna- 

 of several hollow cones tus - 

 placed one within another, the last one 

 forming the chamber of habitation; 

 surface concentrically or longitudinally 

 striated. Type S. ru- 

 gosa. 



billingsi, Safford, 1869. 

 Geo. of Tenn., p. 289, 

 Trenton Gr. 



obtusa, Billings, 1861, Pal. 

 Foss., vol. 1, p. 18, Up. 

 Taconic. 



pulchella, Billings, 1861, 

 Pal. Foss., vol. 1, p. 18, 

 Up. Taconic. 



rugosa, Billings, 1861, Pal. 

 Foss., vol. 1, p. 17, Up. 

 Taconic. 



SCOLITHUS, Haldeman, 1840, Supp. to. Mon- 

 graph of Limniades. [Ety. skolex, worm ; 



FIG. 942. Salter- 

 ella rugosa. 



