184 



LAMBLLIBRANCHIATA. 



tenuilamellata, Hall, 1859, Pal. N. Y., 



vol. 3, Low. Held. Gr. [Sig. very thin- 

 plated.] 

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



Held. Gr. [Sig. woven.] 

 textilis var. arenaria, Hall, lS."i9, Pal. N. 



Y., vol. 3, Low. Held. Gr. [i^iu'. sand}'.] 

 trentonensis, Conrad, 1842, Jour. Acad. 



Xat. Sci., vol. 8, Trenton Gr. [Ety. 



proper name.] 

 tricostata, Vuiuixem, 1842, Geo. Rep. N. 



Y., ChemnngGr. [Sig. three-ribbed.] 

 trilobata, Conrad, 1842, Jour. Acad. Nat. 



Sci., vol. 8, Up. Sil. [Sig. three-lobed.] 

 tri|>listriata, Stevens, 1858, Am. Jour. 



Sci., vol. 25, Coal Meas. [Sig. three- 

 lined.] 

 triquetra, Plall, 1S43, CJeo. Rep. X. Y., 



Onondaga Gr. [Sig. a triangle or 



three-cornered figure.] 

 triradiata, Conrad, 1842, Geo. Rep. 3rd 



Dist. N. Y., Portage Gr. [Sig. three- 

 plicated.] 

 - tuberculata, Conrad, 1838, Ann. Rep. X. 



Y., Corniferous Gr. [Sig. tubercu- 



lated.] 

 umbonata. Hall, 1859, Pal. X. Y., vol. 3, 



Low. Held. Gr. [Sig. ])rotuberant.] 

 undata. Hall, 1852, Pal. N. Y., vol. 2, 



Niagara Gr. [Sig. wavy.] 

 Avelchi, James, 1874, Cin. Quar. Jour. Sci., 



vol. 1, Cin'ti Gr. [Ety. proper name.] 

 whitii, Winchell, 1863, Proc. Acad. Nat. 



Sci., Chemung Gr. [Ety. proper 



name.] 

 AvicuLOPECTEN, McCoy, 1S51, Ann. Mag. 



Nat. Hist., 2nrr series, vol. 7. [Ety. 



Avicniopecten, from the resemblance to 



the shells of the genera Ariculn and 



Pecien. ] 

 acadicQS, Hartt, 1868, Acail. (tchI., Carb. 



[Ety. proper name.] 

 acutialatus. Swallow, 1858, (Avicula acu- 



tialata) Trans. St. Louis Acail. Sci., 



Permian Gr. [Sig. sharp-winged.] 



iequilaterus, Hall, 1843, ( Avicula pequila- 



tera) Geo. Rc|.. 4th Pist. X. Y., Up. 



Held. (4r. ami Marccllus shale. [Sig. 



p(jual-.sidcd.] 

 ampins, ilcck A Worthen, ISliO, Proc. 



Acad. X;)t. Sci. Phil, Keokuk Gr. 



[Sig. full, large.] 



armigerus, Harlan, 18-35, (Pecten arnjige- 

 rus) Trans. "Geo. Soc. Penn., Carb. 

 [Sig. armed.] 



aviculatus. Swallow, 18-58, (Pecten avicu- 

 latu.s) Trans. St. Louis Acad. Sci.,Ciial 

 ]\leas. [Sig. spread out like an .Ir/cii/c] 



burlingtonensis, Meek & "Wortlien, 1860, 

 Proc. Acad. Nat. Sci., Burlington <}r. 

 [Ety. proper name.] 



canoellatus, Hall, 1843, (Pecten cancel- 

 latus) (feo. Rep. 4lh Dist. N. Y., 

 Chemung Ur. [Sig. cancellated.] 



carboniferus, Stevens, 1858, (Pecten car- 

 boniferus) Am. Jour. Sci. & Arts, Coal 

 Meas. [Sig. from the coal formation.] 



caroli, Winchell, 1863, Proc. Acad. Nat. 



Sci., Chemung Gr. [Ety. proper 



name.] 

 clevelandicus. Swallow, 1858, (Pecten 



clevelandicus) Trans. St. Louis Acad. 



Sri., Permian Gr. [Ety. proper name.] 

 colrinidoensis, Newbei-ry, 1861, Ives' Col. 



Ex. Exped., C't'id I\leas. [Ety. proper 



name.] 

 convexus, Hall, 1843. (Pecten con vexus) 



(tco. liep. 4th Uisf. X'. Y., Chemung 



( fr. [Sig. convex.] 

 cora, Dawson, 181)8, Acad. <ieol., Carb. 



[Ety. mythological name.] 

 coreyanus. White, 1874, Rep. Invert. 



Foss. [ICtv. proper name.] 

 coxanus, ?ileek & Worthen, 1860, Proc. 



Acad. Nat. Sci. Phil., Coal Meas. 



[Ety. pi'oper name.] 

 crassicostatus, Hall, 1872, 24th Reg. Rep., 



Up. Held. (ir. [Sig. thick-ribbed.] 

 crenistriatus, Mi'ck, 1871, Proc. Acad. 



Nat. Sci. Phil., Waverly Gr. [Sig. 



having crenulated stri.'i-.] 

 debertanus, Dawson, 1868, Acad. Geol., 



('ail)nniferous. [Ety. proper name.] 

 dolabriformis, Hall, 1843, (Pecten (?) 



dolabriformis) Geo. Rep. 4th Dist. N. 



Y., Chemung Gr. [Sig. resembling 



a mattock or ]iick axe.] 

 dujilicatns, Hall, 1843, (Pecten duplicatus) 



(4c'.). Rep. 4th Dist. X. Y., Chemung 



Gr. [Sig. doubled, folded in two.] 

 fra.trilis. Hall, 1843, (Avicula fragilis) 



Geo. Rep. 4th Dist. N. Y., Genessee 



slate. [Sig. frail, easily broken.] 

 (llahi'i; see Pernopecten glaber. 

 gradicostus. White, 18 6 2, Proc. Bost. 



Soc, Nat. Hist., vol. 9, Chemung Gr. 



[Sig. ribbed in steps.] 

 halli. Swallow, 1860, (Avicula halli)Trans. 



St. Louis Acad. Sci., Coal :\leas. [Ety. 



1 ■roper name.] 

 hertzeri, I\Ieek, 1875, Ohio Pal., vol. 2, 



Ciial Ml as. [Ety. proper name,] 

 indianensis, >leekit Worthen, lSi6, Proc. 



,\ca<l. Nat. Sci. Phil., Keokuk Gr. 



[Ety. proper name.] 

 intercostalis, ^Vinchell, 1866, Rep. Low. 



Peninsula Mich., Ham. Gr. [Sig. 



lined between cost.'X'.] 

 interlineatus, ^leek & Worthen, 186 0, 



Proc. Acad. Nat. Sri. Phil., Low. Coal 



Meas. [Sig. interlined.] 

 konincki, ■\Ieek ^- Worthen, 1860, Proc. 



Acad. Xat. Sci. Phil., Coal Meas. 



[Ety. iiroper name.] 

 liiiiiifdi-iiiix, see Pernopecten limiformis. 

 lyelli, Daw.son, 1868, Acad. Geol., Carb. 



[Ktv. j)ropcr name.] 

 niaccoyi, .Aleck & Hayden, 1865, Pal.,Up. 



IMo., Permian (Hr. [Ety. proper name.] 

 missouriensis, Shumard, 1855, (Pecten 



niissuuriensis) Geo. Rep. Mo., St. Louis 



t-lr. [Ety. proper name.] 

 neglectus, Geinitz, 1866, (Pecten neglec- 



tus) Carb. unci Dyas in Neb., Coal 



Meas. [Sig. overlooked.] 



