586 



CAMBRIAN BRACHIOPODA. 



Order NEOTREMATA Beecher. 



[vEOf, young; and zpfiiiiy perforation.] 



Superfamily SIPHONOTRETACEA Walcott and Schuchert. 

 Family OBOLELLID.^ Walcott and Sclmcliert. 



Genus OBOLELLA Billings. « 



[Obolus.) 

 Oholella Billings, 1861, Geol. Survey Canada, Paleozoic Fossils, vol. 1, p. 7. (Described and discussed as a new 



genus.) 

 Oholella Billings, 1861, Report on the Geology of Vermont, vol. 2, p. 946. (Copy of preceding reference.) 

 Oholella Billings, 1862, Report on the Economic Geology of Vermont, by Hager, p. 218. (Copy of preceding refer- 

 ence.) 

 Oholella Billings, 1862, Am. Join. Sci., 2d ser., vol. 3.3, pp. 420-i21. (Note on date of first publication.) 

 Oholella Billings, Hall, 1863, Sixteenth Ann. Rept. New York State Cab. Nat. Hist., p. 131. (Original description, 



Billings, 1861b, p. 7, copied.) 

 Oholella Billings, Meek and Hayden, 1865, Smithsonian Contrib. Knowl., No. 172, Paleontology Upper Missouri, 



pt. 1, pp. 3-4. (Original description, Billings, 1861b, p. 7, copied.) 

 Oholella Billings, Davidson, 1866, British Fossil Brachiopoda, vol. 3, pt. 7, No. 1, p. 60. (Original description, 



Billings, 1861b, p. 7, copied and genus discussed.) 

 Oholella Billings, Hall, 1867, Trans. Albany Inst., vol. 5, p. 108. (Original description, Billings, 1861b, p. 7, copied.) 

 Oholella Billings, Davidson, 1868, Geol. Mag., vol. 5, pp. 308-309. (Original description, Billings, 1861b, p. 7, copied 



and genus discussed.) 

 Oholella Billings, Dall, 1870, Am. Jour. Conchology, 2d ser., vol. 6, pt. 2, pp. 154 and 163. (Described.) 

 Oholella Billings, Davidson, 1871, British Fossil Brachiopoda, vol. 3, pt. 7, No. 4, pp. 338-339. (Copied from David- 

 son, 1868, pp. 308-309.) 

 Oholella Billings, 1872, Canadian Naturalist, 2d ser., vol. 6, No. 2, pp. 217-218. (Described and discussed.) 

 Oholella Billings, 1872, Am. Jour. Sci., 3d ser., vol. 3, pp. 355-357. (Described and discussed.) 

 Oholella Billings, 1876, idem, vol. 11, pp. 176-178. (General description and discussion of genus and species referred 



to it.) 

 Oholella Billings, Zittel, 1880, Handbuch der Paleeontologie, Bd. I, Abth. 1, p. 664. (Described in German.) 

 Oholella Billings, Ford, 1881, Am. Jour. Sci., 3d ser., vol. 21, pp. 131-134. (General discussion of genus and species 



referred to it.) 

 Oholella Billings?, Walcott, 1884, Mon. U. S. Geol. Survey, vol. 8, pp. 67-68. (Genus discussed in description of 



" Oholella ambigua.") 

 Oholella Billmgs, Walcott, 1886, Bull. U. S. Geol. Survey No. 30, pp. 109-112. (Original description, BQlings, 



1861b, p. 7, and later description, Billings, 1876, p. 176, copied and species referred to the genus discussed.) 

 Oholella Billings, Oehlert, 1887, Manuel de conchyliologie, by Fischer, p. 1262. (Described in French, with figures 



of "0. desquamata Hall.") 

 Oholella Billmgs, Hall and Clarke (in part), 1892, Eleventh Ann. Rept. State Geologist New York for 1891, pp. 240- 



241. (Described and discussed, the genus Dicellomus being included as a synonym.) 

 Oholella Billings, Hall and Clarke, 1892, Forty-fifth Ann. Rept. New York State Museum for 1891, pp. 556-557. 



(Copy of preceding reference.) 

 Oholella Billings, Hall and Clarke (in part), 1892, Nat. Hist. New York, Paleontology, vol. 8, pt. 1, pp. 66-73. 



(Genus described, with a general discussion of the genus and the species referred to it. The genus Dicellomus 

 is included as a synonym, and the reference also includes species now referred to Bicia, Obolus, etc.) 

 Oholella Billings, Hall and Clarke, 1892, idem, pp. 164-165. (Generic relations discussed.) 

 Oholella Billings, Matthew, 1892, Trans. Roy. Soc. Canada for 1891, vol. 9, sec. 4, No. 5, pp. 39-40. (Original 

 description, Billings, 1861b, p. 7, copied and literature on the genus discussed.) 



a Many of the references to Obolella in the synonymy are based upon or include species now referred to other genera. The present reference 

 of all species formerly placed under Obolella will be found on pages 69-72. The synonymy for this genus does not give a complete record of the 

 various genera under which the species now included in Obolella were formerly placed; it gives only those references in which the genus is 

 discussed or described. To complete the record the following mere generic references are listed: 



Orbieulaf Hall [1847, p. 290]. 



vliiicMZa? Hall [1847, p. 292]. 



Obolella f {Orbicula ?) Ford [1871, p. 33]. 



Dicellomus Hall [1873, p. 246]. 



Obolella Ford [1878, p. 128]. 



Obolella Walcott [188Sa, pp. 116-117; 1885b, p. 21]. 



Obolella Ford [1886a, p. 466]. 



Obolella Shaler and Foerste [1888, p. 27]. 



Obolella Walcott [lS90b, p. 36]. 



Camerella Walcott [1890b, p. 36]. 



Obolella Walcott [1891a, p. 611]. 



Camarella Walcott [1891a, p. 614]. 



Camarella Hall and Clarke [1894, p. 221]. 



Protorhynclia f Schuchert [1897, p. 334]. 



Obolella Matthew [lS99d, p. 70]. 



Obolella Walcott [1899, p. 446]. 



Obolella Burr [1900, p. 47]. 



Obolella Grabau [1900, p. 620]. 



Obolella Walcott [1901, p. 674]. 



Obolella ? Matley [1902, pp. 137 and 139]. 



Obolella Delgado [1904, p. 364]. 



Obolella Etheridge [1905, pp. 248 and 249]. 



Obolella Gorham [1905, Pi, I]. 



Obolella Walcott [1906a, pp. 297 and 313]. 



Obolella Clark and Mathews [1906, p. 252]. 



