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. 

 Plakolites, Nicholson, 1873, Proc. Roy. 



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



Mhos, 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, flinde, 1879, Quar. Jour. Geo. 



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

 crapsus, 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. 36, 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. 

 palmatns, Hinde, 1879, Quar. Jour. Geo. 



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

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



Soc. Lond., vol. 35, p. 306, Ham. Gr. 

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



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

 punctatns, 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. 



FiK'he d. Silur. Syst., p. 28. [Ety. pri- 



onion, small paw ; 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. 

 Fische 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. Cin. 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. Cin. Soc. 

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

 ornatus, Ulrich, 1878, Jour. 

 Cin. 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, fig. 941.— 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. 289J 

 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 ; 



^y£ 



Fig. 942.-Salter- 

 ella rugosa. 



