OLENELLUS AND OTHER GENERA OF MESONACID.E 2/1 



Olcnellus asaphoides (Emmons), Matthew, 1891. American Geologist, 

 Vol. 8, p. 289 and footnote. (Suggests that the species is from a 

 different horizon from that of "' OlencUus fhoinpsoni " and " Olenellits 

 (Mcsoiiacis) vennontana," and believes that ElUptoccphala should be 

 retained as the generic reference.) 



Olenellus (Mesonacis) asaphoides (Emmons), Walcott, 1891, Tenth Ann. 

 Rept. U. S. Geol. Survey, pp. 637-638, pi. 86, figs. 3, 3a-b ; pi. 88, figs. 

 I, la-g; pi. 89, figs. I, la; and pi. 90, figs, i, la. (Discussed. Figures 3, 

 3a-b, pi. 86, are copied from Walcott, 1884, pi. 21, figs. 10, 11, and 12 

 respectively; figs, i and la, pi. 88, are copied from Walcott, 1886, pi. 17. 

 figs. 5 and 6; fig. id, pi. 88, is redrawn from the specimen illustrated by 

 Ford, 1877, pl- 4- fig- 5 ; figs, ib, ic, id, and le, pi. 88, are copied in this 

 paper, pi. 24, figs. 3, 4, 5, and 10 respectively ; the specimen represented 

 by figure if, pi. 88, is redrawn in this paper, pi. 24, fig. 6; fig. ig, pi. 

 88, is redrawn in this paper, pi. 24, fig. 8; figs, i and la, pi. 89, are 

 copied in this paper, pi. 24, figs. l and 2 respectively; and fig. la, pi. 90, 

 is copied in this paper, pi. 24, fig. 9.) 



Elliptocephala asaphoides (Emmons), Cole, 1892. Natural Science, Vol. i. 

 pp. 340-341. (Notes on use of name.) 



Olenellus asaphoides (Emmons"), Bernard, 1894, Quart. Journ. Geol. Soc. 

 London, Vol. 50. pp. 415-416 and 423-424: fig. 3, p. 415; figs. 4a -c and 

 5, p. 416; and fig. 9. p. 423. (Discusses evidence afforded by tiii? 

 species as to the systematic position of the trilobites. Figure 3 is 

 copied from Walcott, 1886, pi. 17, fig. 5 ; figures 4a-c are copied from 

 Walcott, 1884, pi. 21, figs. ID, II, and 12, outline drawings which were 

 based on Ford's figures L1877, pi. 4, figs. 2, 3, and 4]. Figure 5 is 

 copied from Walcott, 1891, pi. 88, fig. ib : and figure 9 is a diagrammatic 

 restoration of the cephalon figured by Walcott, 1891, pi. 90, fig. i.) 



Mesonacis {Olenellus) asaphoides Peach, 1894, Idem, p. 671 ; text fig. c, 

 p. 672)', ^nd pi. 32, fig. II. (Mentioned. The figures are copied from 

 drawings or parts of drawings given by Walcott [1891, pis. 88 and 89].) 



Olenellus {Mesonacis) asaphoides (Emmons), Beecher, 1895, American 

 Geologist, Vol. 16, p. 176, figs. 6, 7, and 8, p. 175. (Larval stages dis- 

 cussed. Figure 7 is copied from Walcott, 1884, pi. 21, fig. 10, an outline 

 drawing which was based on Ford's figure [1877, pi. 4, fig. 2b] and 

 figure 8 is an outline drawing of the figure given by Walcott [1886, pi. 



17, fig- 5]-) 

 Georgielhis asaphoides (Emmons), Moberg, 1899, Geol. Foren. i Stockholm 



Forhandl, Bd. 21, Hafte 4, p. 316, pi. 13, figs. la and ib. (The species 



is referred to Gcorgiellus, a new genus replacing Elliptocephala and 



the figures are copied from Walcott, 1891, figs, i and la, pi. 89.) 

 Not Olenellus {Mesonacis) asaphoides ? Grabau, 1900, Occasional papers, 



Boston Soc. Nat. Hist., No. 4, Vol. i, pt. 3, pp. 667-669, pi. 34, figs. 



2a-b. (Referred in this paper to Callavia crosbyi.) 

 Not Olcnellus {Mesonacis) asaphoides Burr, 1900, American Geologist, 



Vol. 25, p. 45. (Referred in this paper to Callavia crosbyi.) 

 Olenellus {Georgiellus) asaphoides (Emmons), Pompeckj, 1901, Zeitschr. 



Deutschen geol. Gesellsch., Vol. 53, Heft 2, p. 16. (Name used in the 



discussion of the relation between Olenopsis and various genera of the 



Mesonacidae.) 



