OLENELLUS AND OTHER GENERA OF MESONACID^ 3II 



Genus OLENELLUS Hall 



Oh-nus Hall, 1859, Twelfth Ann. Rept. New York State Cab. Nat. Hist., 

 p. 59. (Merely places the genotype of OlencUus under Olcnus.) 



Olciius Hall, 1859, Nat. Hist. New York, Paleontology, Vol. 3, pt. i, p. 

 525. (Copy of preceding reference.) 



Barrandia Hall (in part), i860, Thirteenth Ann. Rept. New York State 

 Cab. Nat. Hist, p. 115. (Described and discussed as a new genus; 

 beginning with the 5th paragraph the text is a description of "Bar- 

 randia thompsoni." As described the genus includes forms now re- 

 ferred to both Olenellus and Mesonacis. The generic name Bar- 

 randia was preoccupied and Hall later [1862, p. 114] proposed 

 Olenellus.) 



Parad oxides Emmons, i860. Manual of Geology, 2d ed., p. 88, fig. 70. 

 (Illustrates a specimen of OlcncUns thompsoni Hall as Paradoxides 

 macrocephalus. In the first edition this figure was labeled Paradoxides 

 brachycephalus.) 



Not Barrandia McCoy, proposed for a genus of trilobites. 



Barrandia Hall (in part), 1861. Report on the Geology of Vermont, Vol. 

 I, p. 369. (Copy of Hall, i860, p. 115; the reference including species 

 now referred to both Mesonacis and Olenellus. Beginning with the Sth 

 paragraph the text is a description of the species "Barrandia tJiomp- 

 soni" ; this is also copied from Hall [1860].) 



Olenellus Hall, 1862, Fifteenth Rept. New York State Cab. Nat. Hist., p. 

 114. (Proposed as a new genus to replace Barrandia which was pre- 

 occupied by McCoy. The name had been used in Manuscript as early 

 as i860.) 



Olenellus (Hall), Ford (in part), 1881, American Journ. Sci.. 3d sen, Vol. 

 22, p. 251. (As discussed throughout this paper the genus Olenellus 

 includes forms now referred to Elliptoeephala. Mesonacis. and 

 Olenellus.) 



Olenellus (Hall), Walcott (in part). 1886, Bull. U. S. Geol. Survey, 30, 

 pp. 162-166. (Described and discussed in its relations to other genera. 

 As discussed the genus includes forms now referred to Callavia, 

 Elliptoeephala, and Peachella.) 



Olenellus (Hall), Holm (in part), 1887, Geol. Foren. i Stockholm For- 

 handl., Bd. 9, Hafte 7, pp. 498-499. (Described in Swedish. As de- 

 scribed and discussed throughout the paper the genus includes many 

 of the forms now placed in the family Mesonacidse.) 



Olenellus Marcou, 1889, Proc. Boston Soc. Nat. Hist., Vol. 24, p. 74. 

 (Considers Olenellus a synonym of " Elliptocephalus.") 



Olenellus (Hall), Walcott, 1890, Proc. U. S. National Museum, Vol. 12, 

 pp. 40-41. (States that Olenellus is stratigraphically older than Para- 

 doxides.) 



Olenellus Marcou, 1890, American Geologist, Vol. 5, p. 362. (Considers 

 Olenellus a synonym of "Elliptocephalus.") 



Olenellus Hall, Walcott (in part), 1891, Tenth Ann. Rept. U. S. Geol. 

 Survey, pp. 633-635. (Discussed in its relations to other genera. As 

 discussed the genus includes forms now referred to Callavia.) 



