CRUSTACEA. 



211 



romingeri, Walcott, 1876, Desc. New Pal. 

 Foss., Black Rly. &Trenton Gr. [Kty. 

 proper name.] 



selenurus, see Dalmanites selenurus. 



sitiih'xt, see Proetus stokesi. 



tetragonocephiilus,Green, ]834,Am. Jour. 

 Soi., vol. 25. [Sig. square-headed.] 



tir.iitoiieiuiK, see Lichas trcntonensis. 



triinblii, Green, 1837, Jour. Arad. Nat. 

 Sci. Phil., vol. 7, Niagara Gr. [Ety. 

 proper name.] 



vetustus, Hall, 1847, (Ogygia vetustus) 

 Pal. N. Y., vol. 1, Trenton & Hud. 

 Riv. Gr. [Sit;-, ancient.] 



wisconsinensis, Walcott, 1876, Desc. New 

 Sp. Foss., Trenton Gr. [Ety. proper 

 name.] 

 Atopg, Emmons. 8yn. for Triarthrus. 



trilineatm, see Triarthrus trilineatus. 

 Bairiindia, Hall, 1860. The name was pre- 

 occupied by McCoy 1849, and Olc- 

 nellus was afterwards substituted. 



tliompsoni, see Olunellus thompsoni. 



vermontana, see Olenellus vermontanus. 

 Bathynotus, Hall, 1860, 18th Reg. Rep. N. 

 Y. [Ety. bathys, ample ; noios, the 

 back ; in allusion to the ample central 

 lobe or axis of the typical species.] 



holopyga. Hall, 18 59, (Olenellus holo- 

 ))yga) 12th Reg. Rep. X. Y., Potsdam 

 Gr. [Ety. Iiolos, entire, all ; pygos, 

 rump.] 

 Batityuuellus, Billings, 1865, Pal. Foss. 

 [Ety. diminutive of -Raf/(7/i(r»,s-,of which 

 it is a subgenus.] 



abruptus, Billings, 1865, Pal. Foss., Que- 

 bec Gr. [Sig. abrupt.] 



bradleyi. Meek, 1872, Hayden'sGeo. Rep., 

 Quebec Gr. [Ety. proper name.] 



expansus, Billings, I860, Pal. Foss., Que- 

 bec Gr. [Sig. spread out.] 



formosus, Billings, 1865, Pal. Foss., Que- 

 bec Gr. [Sig. beautiful.] 



fraternus, Billings, 1865, Pal. Foss., Que- 

 bec Gr. [Sig. fraternal] 



litoreus, Billings, 1865, Pal. Foss., Que- 

 bec Gr. [Sig. occurring on the beach.] 



marginatus, BiUings, 1865, Pal. Foss., Que- 

 bec Gr. [Sig. bordered.] 



nitidus, Billings, 1865, Pal. Foss., Quebec 

 Gr. [Sig. neat, pretty.] 



rarus, Billings, 1865, Pal. Foss., Quebec 

 Gr. [Sig. rare.] 



truncatus. Meek, 1872, Hayden's Geo. 

 Rep., Potsdam Gr. [Sig. truncated.] 



validus, Billings, 1865, Pal. Foss., Queljec 

 Gr. [Sig. strong.] , , , ^ 



wheeleri. Meek, 18 72, Hayden s Geo. 



Rep., Quebec Gr. [Ety. propername.] 



Bathyurus, Billings, 1859, Can. Nat. & 



Geo., vol. 4. [Ety. bathys, deep; oitm, 



the tail.-] 



amplimarginatus, Billings, 1859, Can. 

 Nat. & Geo., vol. 4, Calciferous Gr. 

 [Sig. full-bordered.] 



angehni, Billings, 1H59, Can. Nat. & 

 Geol., vol. 4, Chazy Gr. [Ety. proper 

 name.] 



arcuatus, Billings, 1865, Pal. Foss., vol. 1, 



Quebec Gr. [Sig. bent.] 

 armatus, Bilhngs, 1860, Can. Nat. & 



Geo., vol. 5, Quebec Gr. [Sig. armed.] 

 bituberculatus, Billings, 1860, Can. Nat. 



& Geol., vol. 5, Quebec Gr. [Sig. 



double-tuberculated.] 

 breviceps, Billings, 1865, Pal. Foss., vol. 



1, Quebec Gr. [Sig. short-headed.] 

 capax, Billings, 1860, Can. Nat. & Geol., 



vol. 5, Quebec Gr. [Sig. large.] 

 caudatus, Billings, 1865, Pal. Foss., vol. 



1, Quebec Gr. [Sig. having a tail.] 

 conicus, Billings, 1859, Can. Nat. & Geo., 



vol. 4, Calciferous Gr. [Sig. conical.] 

 cordai, Billings, 1860, Can. Nat. & Geol., 



vol. 5, Calciferous Gr. [Ety. proper 



name.] 

 cybele, Bdlings, 1859, Can. Nat. & Geol., 



vol. 4, Calciferous Gr. [Ety. mytho- 

 logical name.] 

 dubius, Billings. 1860, Can. Nat. & Geol., 



vol. 5, Quebec Gr. [Sig. doubtful.] 

 extans. Hall, 1847, (Asaphus extans) Pal. 



N. Y., vol. 1, Trenton Gr. [Sig. stand- 

 ing up.] 

 gregarius, Billings, 1865, Pal. Foss., vol. 



1, Potsdam Gr. [Sig. occurring in 



flocks.] 

 haydeni. Meek, 1872, Hayden's Geo. Rep., 



Potsdam Gr. [Ety. proper name.] 

 longispinus, Walcott, 1876, Desc. New 



Sp. Foss., Black Riv. & Trenton Gr. 



[Sig. long-spined.] 

 minganensis, Billings, 1865, Pal. Foss., 



vol. 1, Calciferous Gr. [Ety. proper 



name.] 

 nero, Billings. 1865, Pal. Foss., vol. 1, 



Quebec Gr. [Ety. proper name.] 

 oblongus, Billings, 1860, Can. Nat. & 



Geol., vol. 5, Quebec Gr. [Sig. oblong.] 

 parvulus, BiUings, 1861, Pal. Foss., vol. 



1, Potsdam Gr. [Sig. very small.] 

 perplexus, Billings, 1865, Pal. Foss., vol. 



1, Potsdam Gr. [Sig. intricate, per- 

 plexing.] 

 perspicator, Billings, 1865, Pal. Foss., vol. 



1, Quebec Gr. [Sig. sharp-sighted; 



from the large eyes.] 

 quadratus, Billings, 1860, Can. Nat. & 



Geo., vol. 5, Quebec Gr. [Sig. square- 

 shaped.] 

 saffordi, Billings, 1860, Can. Nat. & Geo., 



vol. 5, Quebec Gr. [Ety. proper 



name.] 

 scnectus, Billings, 1861, Pal. Foss., vol. 



1, Potsdam Gr. [Sig. extreme age.] 

 serratus. Meek, 1872, Hayden's Geo. Rep., 



Potsdam Gr. [Sig. serrated.] 

 smithi, Billings, 1862, Pal.- Foss., vol. 1, 



Black Riv. Gr. [Ety. proper name.] 

 solitarius, Billings, 1865, Pal. Foss., vol, 



1, Quebec Gr. [Sig. sohtary.] 

 spiniger. Hall, 1847, (Acidaspis spiniger) 



Pal. N. Y., vol. 1, Black Riv. & Tren- 

 ton Gr. [Sig. spiny.] 

 strenuus, Billings, 1865, Pal. Foss., vol. 



1, Quebec Gr. [Sig. vigorous.] 



