310 AMEKICAN FOSSIL BKYOZOA. [BULL.m. 



LYEOPORA Hall— Continued. 



1897. Lyroporina. Simpson, Fourteenth Ann. Rep. State Geologist New York 



for the year 1894, p. 522. 

 1897. Lyroporidra. Simpson, Fourteenth Ann. Rep. State Geologist New York 

 for the year 1894, pp. 517, 522. 



Obs. On page 701 of the Thirteenth Ann. Rep. State Geologist New York 

 for the year 1893 Simpson proposes the name Lyroporella for species of 

 Lyropora having but two ranges of cells on a branch throughout. On 

 page 723 of the same work the name Lyroporina is proposed for the same 

 group. No genotype is mentioned, nor do we know of any species having 

 but two ranges of cells. This group is therefore apparently imaginary, 

 and should strictly not have been placed al>ove as a synonym of Lyro- 

 pora. On page 724 a new genus Lyroporella is made for forms having 

 two ranges of cells on the narrower portion of the branches and three or 

 more on the wider portion. 



In the Fourteenth Annual Report of the State Geologist of New York for 

 the year 1894 Lyroporella is held for the two and three ranged forms, 

 Lyroporina for the two ranged, and anew genus Lyroporidra is added. 

 Six species and one variety of Lyropora have been described, and we 

 know of no new forms. These species show that the only constant 

 generic character is the thickened V or U shaped calcareous support. 

 This at once shows the utter uselessness of Simpson's proposed names. 

 The same carelessness and artificiality are exhibited in other cases. See 

 synonymy under Ptiloporella, Riloporina, Fenestella, Polypora, etc. 



Lyropora cinctura Hall. See Reteporidra cinctuta (Hall). 



Lyropora divergens Ulrich. 



1890. Lyropora divergens. Ulrich, Geol. Sur. Illinois, VIII, p. 584, pi. Iviii, 



4-4b, 4d. 

 1894. Lyropora divergens. Keyes, Missouri Geol. Sur., V, p. 28. 

 Chester: Chester, Illinois; Sloans Valley, Kentucky. 



Lyropora ovalis Ulrich. 



1890. Lyropora ovalis. Ulrich, Geol. Sur. Illinois, VIII, p. 585, pi. Iviii, 5-56; pi. 



"iv, 8. 

 Chester: Grayson Springs and Litchfield, Kentucky. 



Lyropora quincuncialis (Hall). 



1857. Fenestella (Lyropora) quincuncialis. Hall, Pmc. American Assoc. Adv. 

 Sci.,X,p.l80. 



1890. Lyropora quincunciahs. Ulrich, Geol. Sur. Illinois, VIII, p. 583, pi. Iviii, 

 3-3(?, pi. Iv, 7-7c. 



1894. Lyropora quincuncialis. Keyes, Missouri Geol. Sur., Y, p. 27. 



1897. Lyroporella quincuncialis. Simpson, Fourteenth Ann. Rep. State Geolo- 

 gist New York for the year 1894, fig. 69 (p. 516). 

 Chester: Chester, Illinois; Sloans Valley, Kentucky. 



Lyropora ranosculum Ulrich. 



1890. Lyropora ranosculum. Ulrich,Geol. Sur. Illinois, VIII, p. 581, pi. Iviii, 1-1 c. 

 1897. Lyropora ranosculum. Simpson, Fourteenth Ann. Rep. State Geologist 

 New York for the year 1894, figs. 66-68 (p. 515) . 

 Chester: Chester and Kaskaskia, Illinois; Sloans Valley, Kentucky. 



Lyropora retrorsa (Meek and Worthen). 



1868. Fenestella (Lyropora) retrorsa. Meek and Worthen, Geol. Snr. Illinois, 

 III, p. 504, pi. XV, 1. 



