244 



ADDENDA. 



varians, Hall, 1876, Illust. Devonian Foss., 

 Ham. Gr. [Sig. variable.] 

 Dentalium sublKve, Hall, 1877, Coal Meas. 

 [Sig. somewhat smooth.] Proposed 

 instead of D. obsoletum, Hall, 1858, 

 which was preoccupied. 

 DisoiNA saffordi, Winchell, 1869, Geo. Tenn., 



Low. Garb. [Ety. proper name.] 

 EoDON, Hall, 1877. Proposed instead of 

 Microdon, Conrad, which was preoc- 

 cupied. [Ety. eos, beginning ; odous, a 

 tooth ; from the rudimentary teeth.] 



bellistriatus, Conrad, 1842, (Microdon 

 bellistriata) Jour. Acad. Nat. Sci., vol. 

 8, Ham. Gr. [Sig. beautifully lined.] 



complanatus, Hall, 187(1, (Microdon com- 

 planatus) Prelim. Notice Lam. shells. 

 Ham. Gr. [Sig. smoothed.] 



gregarius. Hall, 1870, (Microdon gre- 

 garia) Prelim. Notice Lam. shells. 

 Ham. Gr. [Sig. gregarious.] 



reservatus. Hall, 1870, (Microdon reser- 

 vatus) Prelim. Notice Lam. shells, 

 Waverly Gr. [Sig. reserved.] 



tenuistriatus. Hall, 1870, (Microdon ten- 

 uistriata) Prelim. Notice Lam. shells. 

 Ham. Gr. [Sig. finely lined.] 

 EuoMPHALUs decollatus, Hall, 1877, Low. 

 Held. Gr. [Sig. decollated, behead- 

 ed.] Proposed instead of E. disjunctus, 

 Hall, 1859, which was preoccupied. 



hecale. Hall, 1876, is the same species 

 described by Hall, 1843, as E. deprea- 

 si(s, which was preoccupied. 

 EusARCUs, Grote & Pitt, 1876, Buff. Acad. 

 Nat. Sci., vol. 3. [Ety. euaarkos, fleshy.] 

 This belongs to the family Euriptcridse. 



scorpionis, Grote & Pitt, 1876, Buff. Acad. 

 Nat. Sci., Waterhme Gr. [Sig. a scor- 

 pion.] 

 Eavosites arbuscula. Hall, 1876, Illust. De- 

 vonian Foss., Ham. Gr. [Ety. proper 

 name.] 



argus. Hall, 1876, Illust. Devonian Foss., 

 Ham. Gr. [Ety. mythnlogical name.] 



emmonsi, Hall, ""-./e, 'li'jM Devoni t 

 Foss., Up. H^ld. Gi'. L^l}'- prc.pe; 

 name.] 



epidermatus var. bilnculi. Hall, 18 76, 

 Illust. Devonian Foss., Up. Held. Gr. 

 [Sig. having a double receptacle.] 



epidermatus var. corticosus. Hall, 1876, 

 Illust. Devonian Foss., Up. Held. Gr. 

 [Sig. covered with a crust.] 



explanatus. Hall, 1876, Illust. Devonian 

 Foss., Ham. Gr. [Sig. spread out.] 



hamiltoniae. Hall, 1876, Illust. Devonian 

 Foss., Ham. Gr. [Ety. proper name.] 



hemisphericus var. distortus, Hall, 1876, 

 Illust. Devonian Foss., Up. Held. Gr. 

 [Sig. distorted.] 



hemisphericus var. rectus, Hall, 1876, 

 Illust. Devonian Foss., Up. Held. Gr. 

 [Sig. straight.] 

 Gbaptolithus subtenuis. Hall, 1877, Hud. 

 Riv. Gr. [Sig. somewhat slender.] 

 Proposed instead of O. knuis, Hall, 

 which was preoccupied. 



Gyrocbras rhombolineare, Owen, 1862, 

 Geo. Sur. Indiana. [Sig. from the 

 rhomb-like markings.] 



Halysites sexto-attenuatus, Owen, 1862, 

 Geo. Sur. Indiana, Niagara Gr. [Sig. 

 having six contracted places.] 



Heliophyllum arachne. Hall, 1876, Illust. 

 Devonian Foss., Ham. Gr. [Ety. my- 

 thological name.] 

 confluens, Hall, 1876, Illust. Devonian 

 Foss., Ham. Gr. [Sig. confluent, 

 running together.] 

 degener. Hall, 1876, Illust. Devonian 

 Foss., Ham. Gr. [Sig. degenerated.] 

 halli var. reflexum. Hall, 1876, Illust. 

 Devonian Foss., Ham. Gr. [Sig. 



reflexed.] 

 halli var. obconicum, Hall, 1876, Illust. 

 Devonian Foss., Ham. Gr. [Sig. in- 

 versely conical.] 

 irregulaie. Hall, 1876, Illust. Devonian 



iJ'oss., Ham. Gr. [Sig. irregular.] 

 proliferum, Hall, 1876, Illust. Devonian 

 Foss., Ham. Gr. [Sig. prolific] 



LiN'GULA perplexa. Hall, 1877, Clinton Gr. 

 [Sig. perplexing.] Proposed instead 

 of L. elliptica, Hall, 1843, which was 

 preoccupied. 



LoxoNEMA emaceratum. Hall, 1877, Low. 

 Held. Gr. [Sig. thin, emacerated.] 

 Proposed instead of L. attenuatum, 

 Llall, 1859, which seems to have been 

 preoccupied by Stevens, 1858, under 

 the name Chemnitzia attenuata. 

 semicostala, Meek, is a syn. for L. (Chem- 

 nitzia) attenuata of Stevens. 



Macrocheilus attenuatum. Hall, 1877, 

 Chazy Gr. [Sig. attenuated.] Pro- 

 posed instead of M. fimforme, Hall, 

 1858, which was preoccupied. 



Michelinia dividua. Hall, 1876, Illust. Devo- 

 nian Foss., Ham. Gr. [Sig. divisible.] 

 st\lopora, Eaton, 1S.'V2, (Astrea .stvlopora) 

 Geo. Text Book, Ham. Gr. [Sig. hav- 

 ing pointed cells.] 



Mli.chisonia decurta. Hall, 1877, Chazy Gr. 

 [Sig. cut off.] Proposed instead of 

 M. abbreviata, Hall, 1S47, which was 

 preoccupied, 

 micula. Hall, 1877, Ham. Gr. [Sig. a 

 little crumb.] Proposed instead of 

 M. iurricula, Hall, 1862, which was 

 preoccupied, 

 milleri. Hall, 1877, Trenton & Cin'ti Gr. 

 [Ety. proper name.] Proposed in- 

 stead of M. bicincta, Hall, 1847, which 

 was preoccupied. 



Orthoceras clintoni. Hall, 1877, Chazy Gr. 

 [Ety. proper name.] Proposed instead 

 of 0. subarcuatum, Hall, 1847, which 

 was preoccupied, 

 desideratum. Hall, 1877, Low. Held. Gr. 

 [Sig. to be desired.] Proposed instead 

 of 0. clavatum, Hall, 1859, which was 

 preoccupied. 



