NroKLEs AXD BAssLER.] CATALOGUE OF GENERA AND SPECIES. 437 



UNITRYPA Hall— Continued. 



1897. Unitrypa. Simpson, Fourteenth Ann. Rep. State f Jeologist New York for 



the year 1894, pp. 508, .520. 

 1899. T^nitrypa. Grabau, Bull. Buffalo Soc. Nat. Sci., VI, p. 161. 



Unitrypa acaulis (Hall). 



1883. Fenestella (Hemitrypa) acaulis. Hall, Trans. Albany Institute, X, p. 175 

 (abstract, 1881, p. 33). 



1886. Fenestella (Unitrypa) acaulis. Hall, Fifth Ann. Rep. State Geologist New 



York for the year 1885, pi. li, 1-6. 



1887. Fenestella (Unitrypa) acaulis. Hall and Simpson, Pal. New York, VI, 



p. 131, pi. li, 1-6. 



1886. Unitrypa conferta. Ulrich, Contr. American Pal., I, p. 17, pi. i, 8, 8a. 



1887. Fenestella (Unitrypa) projecta. Hall and Simpson, Pal. New York, VI, 



p. 132. 



1888. Fenestella (Unitrypa) projecta. Hall, Seventh Ann. Rep. State Geologist 



New York for the year 1887, pi. xiv, 6-8; Forty-first Ann. Rep. New 

 York State Museum, pi. xiv, 6-8. 

 Hamilton: Falls of the Ohio. 



Unitrypa acaulis-inclinis (Hall and Simpson). 



1887. Fenestella (Unitrypa) acaulis var. inclinis. Hall and Simpson, Pal. New 

 York, VI, p. 132. 

 Hamilton: Falls of the Ohio. 



Obs. The differences between this form and Unitrypa acaulis are scarcely 

 of \'arietal importance. 



Unitrypa acclivis (Hall and Simpson). 



1S87. Fenestella (Unitrypa) acclivis. Hall and Simpson, Pal. New York, VI, 



p. 138, pi. lii, 16-23. 

 1897. Unitrypa acclivis. Simpson, Fourteenth Ann. Rep. State Geologist New 

 York for the year 1894, pi. v, 15. 

 Upper Helderberg: Walpole, Ontario. 



Unitrypa anonyma (Hall). 



1883. Fenestella (Hemitrypa) anonyma. Hall, Trans. Albany Institute, X, p. 

 176 (abstract, 1881, p. .34). 

 Hamilton: Falls of the Ohio. 



Unitiypa conferta Ulrich. See Unitrypa acaulis (Hall). 



Unitrypa connexa Simpson. 



1897. Unitrypa connexa Hall. Simpson, Fourteenth Ann. Rep. State Geologist 

 New York for the year 1894, pi. v, 12-14. 

 Obs. Simpson ascribes this species to Hall, but we have been unable to 

 find it in any of Hall's works. The species apparently has not yet been 

 described ; until described the name is invalid. 



Unitrypa ? elegantissima (Hall). 



1883. Fenestella (Hemitrypa) elegantissima. Hall, Trans. Albany Institute, X, 

 p. 177 (abstract, 1881, p. 35). 



1886. Fenestella (Unitrypa) elegantissima. Hall, Fifth Ann. Rep. State Geolo- 



gist New York for the year 1885, pi. liii, 12-17. 



1887. Fenestella (Unitrypa) elegantissima. Hall and Simpson, Pal. New York, 



VI, p. 140, p. liii, 12-17. 

 Upper Helderberg: Walpole, Ontario. 



