NO. 13 DIKELOCEPHALUS AND OTHER GENERA 363 



DESCRIPTION OF GENERA AND SPECIES 

 Genus DIKELOCEPHALUS' Owen 



Dikelocephalus Owen, 1852, Rep. Geol. Surv. Wis., Iowa, and Minn., p. 573. 



(Description of genus and observations.) 

 Dikelocephalus Owen, Barranue, 1853, Neues Jahrb. fiir Min., Geol. und 



Geog., p. 336. (Comments on relation of Dikelocephalus to Ogygia.) 

 Dikelocephalus Owen, Emmons, 1855, American Geol., Vol. i, pt. 2, p. 220. 



(Summarizes Owen's description of genus.) 

 Dikelocephalus Owen, Billings, i860, Canadian Nat. Geol., Vol. 5, p. 306. 



(Comments on genus and refers several species to it.) 

 Dikelocephalus Owen, Hall, 1863, Sixteenth Ann. Rep. N. Y. State Cab. 



Nat. Hist., p. 137. (Reprints Owen's description, comments on the 



genus and describes three new species.) 

 Dicellocephahis Owen, Dana ?, 1864, American Journ. Sci. and Arts, 2d ser.. 



Vol. 2)7, P- 139- (Changes spelling of name. The article is unsigned but 



was in all probability written by Prof. James D. Dana.) 

 Dikelocephalus Owen, Billings, 1865, Geol. Surv. Canada, Pal. Fossils, 



Vol. I, p. 399. (Reprints remarks of i860, noted above.) 

 Dikelocephalus Owen, Salter, 1866, Mem. Geol. Surv. Great Britain, Vol. 3, 



p. 303. (Comments on genus and refers four species to it.) 

 Dikelocephalus Owen, Hall, 1867, Trans. Albany Inst., Vol. 5, p. 116. (Re- 

 print of article of 1863.) 

 Dikellocephalus Owen, Hall and Whitfield, 1877, U. S. Geol. Expl. 40th 



Parallel, Vol. 4, p. 225. (Mentions genus and refers three new species 



to it.) 

 Dicellocephahis Owen, Whitfield, 1878, Ann. Rep. Wisconsin Geol. Surv. 



for 1877, p. 63. (Notes finding of uncompressed specimens of genus and 



refers two new species to it.) 

 Dikelocephalus Owen, Salter, 1881, Mem. Geol. Surv. Great Britain, Vol. 3, 



2d ed., p. 497. (Reprint of paper of 1866.) 

 Dikellocephalus Owen, Whitfield, 1882, Geol. Wisconsin, Vol. 4, p. 200. 



(Reprint of paper of 1878, with illustrations of the two species described 



under the genus.) 

 Dikellocephalus Owen, Dames, 1883, China, Richthofen, Vol. 4, pp. 5, 6, 



(Comments on species referred to genus.) 

 Dicellocephalus Owen, Matthew, 1893, Trans. Royal Soc. Canada, Vol. 10, 



Sec. 4, p. ID. (Discusses the geographic and stratigraphic distribution 



of the genus and the validity of the generic reference.) 

 Dikelokephalus Owen, Brogger, 1897, Nyt Mag. for Naturvid., Vol. 2^, 



PP- i79> 182, 183. (Discusses questions of species that have been referred 



to the genus.) 

 Dikelocephalus Owen, Beecher, 1897, American Journ. Sci., 4th ser.. Vol. 3, 



p. 192. (Classifies Dikelocephalus as the type of a subfamily of the 



Olenidse to be known as Dikelocephalinse. 



^ Under the rule that, "The original orthography of the name is to be 

 rigidly preserved unless a typographical error is evident," Owen's spelling of 

 Dikelocephalus is followed. From Gr. (VinMa, a mattock or two-pronged hoe, 

 and ''f'/'"'^''/, head. Z^i/tr/Gi.-r/'/za/rt.y has been called " shovel-head " (Chamberlin, 

 1883, Geol. Wisconsin, 1873-79, Vol. i, p. 131). 



