ANNELIDA. 



207 



Spirorbis, Lamarck, 1801, Syst. An. sans 

 Vert. [Sig. spiral-whorl.] 



ammon, Winchell, 186(5, Kep. Low. Pen- 

 insula Mich., Ham. Gr. [Ety. mytho- 

 logical name.] 



angulatus. Hall, 1862, 15th Reg. Rep. 

 N.Y., Ham. Gr. [Sig. angular.] 



angulatus, Dawson, 1868. The name was 

 preoccupied. 



annulatus. Hall, 1858, Trans. Alb. Inst., 

 vol. 4, Warsaw Gr. [Sig. ringed.] 



annulatus vai-. nodulosus. Hall, 1858, 

 Trans. Alb. Inst., vol. 4, Warsaw Gr. 

 [Sig. full of knots.] 



arietinus, Dawson, 1869, Rep. of Progr., 

 Coal Meas. [Sig. resembling a ram's 

 horn.] 



arkonensis, Nicholson, 1874, Geo. Mag., 

 vol. 1, Ham. Gr. [Ety. proper name.] 



carbonarius, Dawson, 1845, Quar. Jour. 

 Geo. Soc, vol. 1, Coal Meas. [Sig. 

 pertaining to coal.] 



flexuosus. Hall, 1863, Trans. Alb. Inst., 

 vol. 4, Niagara Gr. [Sig. bent.] 



inornatus. Hall, 1863, Trans. Alb. Inst., 

 vol. 4, Niagara Gr. [Sig. not orna- 

 mented.] 



laxus. Hall, 1859, Pal. N. Y., vol. 3, Low. 

 Held. Gr. [Sig. loose.] 



obesus, Winchell, 1866, Rep. Low. Pen- 

 insula Mich., Ham. Gr. [Sig. plump 

 in form.] 



orbiculostoma. Swallow, 1858, Trans. St. 

 Louis Acad. Sci., Permian Gr. [Sig. 

 orbicular-mouthed.] 



valvatm, Goldfuss, 1826, (Serpula valvata). 

 Not American. 



