812 



THE PALEONTOLOGY OF MINNESOTA. 



I List of < lepbslopoda. 



LIST OF SPECIES OF CEPHALOPODA HERE DESCRIBED. 



Piloceras newton-winclieUi, sp. nov. 

 .\' i n no aulema, Clarke. 

 ( 'iji-iixxrina. (?) scJioolcrafli, sp. nov. 

 Cwneroceras proteifoi-me, Hall. 

 Cameroceras hennepini, sp. nov. 

 Cameroceras, sp. 

 Cameroceras. s.p. nov. 

 Actinocerps bigsbyi, Stokes. 

 Aclinoceras belvitense, Whittleld. 

 Actinoceras remotiseplum, II all. 

 Ortluxxras nicoleti, sp. nov. 

 Orthoceras anellus, Conrad. 

 Orthocera.1 peiTOti, sp. nov. 

 Orthoceras lesueuri, sp. nov. 

 Orthoceras bilineatum, Hall. 

 Orthoceras olorus, Hall. 

 Orthoceras tenuistriatum, Hall. 

 Ortluxxras sociak, Hall. 

 Ortluxxras beltrami, sp. nov. 

 Oiiluxxras multicameratum, Emruons. 

 Orthoceras junceum, Hall. 

 Ortluxxras cf. amplicamerutum, Hall. 

 Triptoceras planoconvexum, Hall. 

 Triptoceras planodorsatum, Whitfleld. 

 Triptoceras oweni, sp, nov. 



Triptoccms Iambi, Whiteaves. 



Triptoceras, sp. ? 



Gonuxxras anceps, Hall. 



Gonioceras occidental, Hall. 



Poterioteras apertum, Whiteavcs. 



Clinoceras mumiceforme, Whitlleld. 



Oncoceras exiguum, Billings. 



Oncoceras minnesotense, sp. nov. 



Oncoceras lycum, Hall. 



Oncoceras carveri, sp. nov. 



Oncoceras douglassi, sp. nov. 



Oncoceras pandion. Hall. 



Cyrtoccrus neleus, Hall. 



Cyrtocents camurum, Whitttold. 



Cyrtoccras hallianum, D'Orbigny. 



Cyrtoctras billingsi, Salter. 



Cyrtoceras hovghtoni, sp. nov. 



Cyrtoccras feather stonhauyhi, sp. nov. 



Cyrtoccras minncapolis, sp. nov. 



Cyrtoceras corniculum, Hall. 



Cyrtoceras norwoodi, sp. nov. 



Cyrtoceras shumardi, sp. nov. 



Cyrtoceras scofieldi, sp. nov. 



ii'iii-ijceras duplicicostatum, Whitfleld. 



Enrystomites undatus var. occidentalis, Hall. 



NOTE IX) PAGK 769. Since recording the observations given upon the structure of Nanno aulema, 

 the original material has been placed in the hands of Professor Alpheus Hyatt for further elucidation. 

 Prof. Hyatt's conclusions, not wholly confirmatory of my inferences, will be published in the "American 

 Geologist" for July, 1895. 



NOTK TO PAGE 774. The Undoceras-aflinities of the ^cims Cijiim-mna have been ronliniiril by 

 Holm's discovery by of large species of this genus witli dorsal sijiliunt's of groat si/e ;IIK| typical structure. 

 (Om tvenne Gyroceras-formight biijda Endoceras-arter; Geol. Fiiren. i Stockli. Fiirhandl. vol. 14, IS!)2). 



Errata for the Chapter on Cephalopoda- 

 766, line 14, after./J/awents, insert or can"'*. 

 1'age 774; the application of the term- ilm-mil and >,/// mi tliis page should be reversed. 

 i Page 777, reference to plates, second line omit 4. 

 W Page 784, reference to plates; for LI read LV; for XL11I read XLVIL 



