ACR. — ASP.] 



PISCES. 



587 



Fm. lluO.— Vcroiepis sedg- 

 wicki. Magnified scale. 



Geo. Sur. III. vol. 2, p. 116, St. 

 L »uis Gr. 

 rectus, St. John & Worthen, 1883, G^o. 

 Sur. III., v.l. 7, p. 2*1, Up. Ooil Meas. 

 xiphiis, So. John & Worthen, 1883, Geo. 

 S ir. III., vol. 7, p. 214, K-okuk Gr. 

 AcROLtcprs, A.ra«siz, 18 !(>, Richerches sur 

 les Poiss. Foss., vol. 2, p. 79. [Ey. 

 akros, sharp.] 

 lepis, scale; 

 Distinguished 

 from Pygopte- 

 rus in the 

 shorter anal 

 fin, the dorsd 

 bing a little 

 more anterior 

 in position and 

 the scales more 

 strongly keeled ami sulcated diagon- 

 ally. Type A. sedgwicki. 

 hortonensis, D.iwson, 18 58, Acad. Geol., 

 p. 2)4, Suhearb »nifer »ns. 

 Agassifhthi/s, Newbjrry, syn. for Micropa- 

 taliehthys. 

 minni, see M icropetalichthys manni. 

 8ulliiHi't.'i, sej ftLauropetahcht oys sulli- 

 vanti. 

 Agassizodus, St John & Worthen, 1875, 

 Geo. Sur. 111., vol. 6, p. 311. [Et,y. 

 proper name; oiunx, tooth.] Teeth 

 variable, transversely elongated, bise 

 usually produced; crown traversed hy 

 a crest, raised into several summit*, 

 the central one often large. Typj A. 

 variabilis, 

 corrugitus, Newberry & Worthen, 1870, 

 (O rod in corrugatus,) Gjo. Sur. III., vol. 

 4, p. 338, Goal Meas. 

 ecitulus, St. John & Worthen, 1875, Geo. 

 Sur. Id., vol. 6, p. 322, Coal Meas. 



Feq. 1101.— Agassizodus variabilis. 



variabilis, Newberry & Worthen, 1870, 

 (Lophodus variabilis,) Geo. Sur. 111., 

 vol. 4, p. 361, Coal M. as. 



virjrinianus, St. John & Worthen, 1875. 

 Geo. Sur. 111., vol. 6, p. 321, Coal 

 Meas. 

 Amacantikis, St. John & Worthen, 1875, 

 Geo. Sir. III., vol. 6, p. 461. [Ecy. 

 ami, backward; nhxnlha, spine.] Dor- 

 sal spine firmly implanted, curved for- 

 ward, laterally compressed, posterior 

 face truncated ami longitudinally keeled 

 or denticulate along the median line; 

 rounded ami tuberculated in the con- 

 cave anterior fice; lateral sur 'ace 

 covered with tuberculose costae. Type 

 A. gibbosus. 



gibbosus, Newberry & Worthen, 1^66, 

 ( Horn icanthu-t gibbosii'O Ceo. Sur. III., 

 vol. 2, p. 113, Sr.. Louis Gr. 

 Amblyi'tkkus, AirasMz, 1833, Recherche^ sur 

 Jes Poissms Fossils, t. 1, p. 28. [Ety. 

 nmblys, blunt; pleron, tin.] All fi is 

 large and comp >sed of numerous rays; 

 pectoral very large; anal iiDad; dorsal 

 oi»p >site the anal p nnt of the ventral, 

 which is fir btck; little rays on the 

 superior lobe of the Ivterocercal tail; 

 head blunt; scales medium, rhomboid. 

 Type A. macropterus. 



macropterus, Agassiz, 1836, R'cherch. 

 P..is-t. F.»ss., vol. 2, p. 28, Coal Weas. 

 Anaci.itacvviiius. St. John & Worthen, 

 1875, Geo Sur. Ill , vol. 6 p. 412. [Ey. 

 an ikli'ox, leant upon; akantha, Bpine.] 

 Fin spine recumbent or imbedded along 

 its inferior extent, lateralis co npres^d, 

 subovale m transverse s ction ; exposed 

 part eonstri;ted along the line of union 

 wih the ba-«e. Type A. s nnicostatus. 



semieostatus, St. John & WoThen. 1875, 

 Geo. Sur. III., vol. 6, p. 443, Burling- 

 ton Gr. 

 Antliodus, Newberry & Worthen, 1866, 

 Geo. Sur. Ill , vol. 2, p. 33. [E f v. anlii, 

 a depression ; oloun, a tooih.] Teeth 

 transversely elliptical, c >mpressed, con- 

 cavo-convex; crown similar to that of 

 Petaloilus; rootshort or obsolete. Type 

 A. mucronatus. 



cufulhn, Newberry & Worthen, 1866, 

 Geo. Sur. III., vol. 2. p. 41, Keokuk Gr. 



gracilis. St. John & Worthen, 1875, Geo. 

 S ir. 111., vol. 6, p. 393, Warsiw Gr. 



minutu-*, N'-wbtny & Worthen, 1866, 

 Geo. Sur. III., vol. 2, p. 43, Keokuk Gr. 



mucrona'us Newberry & Worthen, 1866, 

 Geo. Sur. III., vol. 2, p. 38, St. Louis Gr. 



parvulus, Newberry & Worthen, 1866, 

 Geo. Sur. 111., vol. 2, p. 38, Burling- 

 ton Gr. 



perovalis. St. John & Worthen, 1875, Geo. 

 Sur. 111., vol. 6, p. 393, Warsaw Gr. 



politus. Newbeiry & Worthen, 1866, Geo. 

 Sur. III., vol. 2, p. 42, Keokuk Gr. 



robu^tus, Newberrv & Wonhen, 1866, 

 Geo. Sur. 111., vol. 2, p. 39, KaskaskiaGr. 



sarcnlulus, Newberry & Worthen, 1870, 

 Geo. Sur. 111., vol. 4, p. 336, Barling- 

 ton Gr. 



similis, Newbprry & Worthen, 1866, Geo. 

 Sur. III., vol. 2, p. 41, Keokuk Gr. 



simplex, Newberry & Worthen, 18156. Geo. 

 Sur. III., vol. 2, p. 44, Burlington Gr. 



sulcatum, Newberry & Worthen, 186U, Geo. 

 Sur. III., vol. 2, p. 45, Keokuk Gr. 

 Apedodus, Leidy, 1856, J>iur. Acad. Nat. 

 Sci , 2d ser., vol. 3, p. 162. [Ety. apedos. 

 level, smooth ; odous, tooth.] Flattened 

 lancet-shaped teeth. Typ-; A. priscus. 



priscus, Leidy, 1856, Jour. Acad. Nat. Sci., 

 2d ser., vol. 3, p. 162, Chemung Gr. 

 AsPiDicitTiivs, Newberrv, 1873, Ohio Pal., 

 vol. 1, p. 322. [Ety. atp'is, shield; 

 iclithys, fish.] Dorso-median plate of 

 the carapace similar to that of Pte- 



