382 CAMBRIAN BRACHIOPODA. 



Oholus apoUinis Eichwald, Morris, 1849, Annals and Mag. Nat. Hist., 2d ser., vol. 4, p. 316. (Merely changes generic 



and specific reference of Kutorga's Aulonotreta polita.) 

 Oholus apoUinis Eichwald, Davidson (in pai't), 1853, British Fossil Brachiopoda, vol. 1, introduction. No. 3, figs. 51 



and 52, p. 136, and PI. IX, figs. 280-284 (not fig. 285, which represents Oholus (Acritis) antiquissimus). (No text 



reference. Figs. 280 and 281 appear to be drawn from the specimens figured by Kutorga, 1848, PI. VII, figs. 10a 



and lOf, respectively; figs. 282, 283, and 284 are drawn from the specimens figured by Kutorga, 1848, PI. VII, 



figs. 10b', 10c, and lOe, respectively.) 

 Oholus apoUinis Eichwald, 1860, Lethsea rossica, ancienne p^riode, vol. 1, sec. 2, pp. 925-926. (Described and dis- 

 cussed in French.) 

 Oholus apoUinis Eichwald, Schmidt, 1861, Archiv fiii' Naturkunde Liv-, Ehst-, und Kurlands, 1st ser., Bd. 2, p. 218. 



(Localities mentioned in German.) 

 Oholus apoUinis Eichwald, Billings, 1872, Canadian Naturalist, 2d ser., vol. 6, No. 2, p. 218, fig. 7, p. 217. (Discussed. 



Fig. 7 is copied from Davidson, 1853, PI. IX, fig. 283.) 

 Oholus apoUinis Eichwald, Billings, 1872, Am. Jour. Sci., 3d ser., vol. 3, p. 356, fig. 7, p. 355. (Copy of preceding 



reference.) 

 Oholus apoUinis Eichwald, Roemek, 1876, Lethsea geognostica, pt. 1, Lethsea palasozoica. Atlas, PI. II, figs. 7a-c. (No 



text reference. Figs. 7a-c are copied from de Verneuil, 1845, PI. XIX, figs. 3b, 3a, and 3d, respectively.) 

 Oholus apoUinis Eichwald, Zittel (in part), 1880, Handbuch der Palseontologie, Bd. 1, Abth. 1, p. 664, figs. 488a-c (not 



fig. 488d, which represents Oholus apoUinis quenstedti) . (No text reference. Figs. 488b and 488c are roughly 



copied from Davidson, 1853, PI. IX, fig. 283, and fig. 52, p. 136, respectively. Fig. 488a appears to be roughly 



copied from Kutorga, 1848, PL VII, fig. lOa^) 

 Oholus apoUinis Eichwald, Nobtling, 1883, Jahrb. Konig. preuss. geol. Landesanstalt Berlin for 1882, p. 265. (New 



locality mentioned in German.) 

 Oholus apoUinis Eichwald, Roemek, 1885, Paleontologische Abhandlungen von Dames und Kayser, Bd. 2, Htt. 5, 



pp. 23-24 (270-271), PL I (XXIV), figs. 2a-d. (New localities mentioned in German. Figs. 2b, 2c, and 2d are 



copied from de Verneuil, 1845, PL XIX, figs. 3b, 3a, and 3d, respectively.) 

 Ungulites apoUinis (Eichwald), Quenstedt, 1885, Handbuch der Petrefactenkunde, Aufl. 3, pp. 755 and 756; fig. 262, 



p. 755, and PL LVIII, figs. 56-57. (Characterized in German.) 

 Oholus apoUinis Eichwald, Gagel, 1890, Beitr. zur Naturkunde Preussens, von Physikal.-oekonom. Gesell. Konigs- 



berg, 6, pp. 21-22, PL I, figs. 16, 16a-c. (Described in German. Figs. 16, 16a-c are very rough copies of the 



figm'es given by Roemer, 1885, PL I (XXIV), figs. 2a-d, respectively.) 

 Oholus apoUinis Eichwald, Matthew, 1892, Trans. Roy. Soc. Canada for 1891, 1st ser., vol. 9, pp. 43-44. (A translation 



of the description given by de Verneuil, 1845, pp. 291-292.) 

 OholiLS apoUinis Eichwald, Hall and Clarke, 1892, Eleventh Ann. Rept. State Geologist New York tor 1891, figs. 247 



and 248, p. 242. (No text reference. Fig. 247 is copied from Davidson, 1853, PL IX, fig. 283; fig. 248 is copied 



from Kutorga, 1848, PL VII, fig. 10b'.) 

 Oholus. apoUinis Eichwald, Hall and Clarke, 1892, Forty-fifth Ann. Rept. New York State Museum for 1891, figs. 



247 and 248, p. 558. (Copy of preceding reference.) 

 Oholus apoUinis Eichwald, Hall and Clarke, 1892, Nat. Hist. New York, Paleontology, vol. 8, pt. 1, footnote, p. 80> 



and figs. 33-34, p. 80. (Figures representing; species discussed. Fig. 33 is copied from Davidson, 1853, PL IX, 



fig. 283; fig. 34 is copied from Kutorga, 1848, PL VII, fig. 10b'.) 

 Oholus apoUinis Eichwald, Mickwitz, 1896, Mem. Acad. imp. sci. St.-P6tersbourg, 8th ser., vol. 4, No. 2, pp. 133-137, 



PL I, figs. 1-14. (Described and discussed in German; see below for translation of the essential parts.) 

 Oholus apoUinis Eichwald, Walcott, 1898, Proc. U. S. Nat. Mus., vol. 21, PL XXVI, figs. 3-6. (No text reference. 



The specimens represented by figs. 3-6 are redrawn in this monograph, PL VII, figs. 10-13, respectively.) 

 Oholus apoUinis Eichwald, Moberg and Segerberg, 1906, Medd. fr^n Lunds Geol. Faltklubb, Ser. B, No. 2 (Aftryck 



ur K. Fysiografiska Sallskapets HandL, N. F., Bd. 17), p. 65, PL III, figs. 1-3. (Specimens from new localities 



discussed in Swedish.) 

 Oholus apoUinis Eichwald, WestergIrd, 1909, Medd. fr&n Lunds Geol. Faltklubb, Ser. B, No. 4 (Aftryck ur K. Fysio- 

 grafiska Sallskapets HandL, N. F., Bd. 20), p. 56, PL II, figs. 14-16. (Localities mentioned in Swedish. Figs. 



14-16 are copied from Moberg and Segerberg, 1906, PL III, figs. 1-3, respectively.) 



Oholus apoUinis being the type of the genus, I have reproduced the diagnosis by Mickwitz 

 [1896, p. 133] with the accompanying remarks: 



The series of forms comprised under 0. apoUinis, and connected with each other by many transitions, show such 

 departures in their extreme forms that an abundant material was necessary in order to show that they belong together. 

 With the increasing number of different forms there was an increasing difficulty in grouping them and in deciding 

 the question as to which of these many forms were to be regarded as species and which as varieties. The small oval 

 Valves corresponding to Eichwald's original in the Zoologia specialis show the generic characters much less pronounced 

 than many of the forms described below. Still Eichwald's conception was retained and merely somewhat amplified 

 by the incorporation of a small rounded form, because this form showed closer relation to Eichwald's original than to 

 the more divergent large forms described as varieties. 



