830 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Montrypa undulata hemispherica Continued. 



Observation. Founded on Nicholson's figures of the "rounded or irregularly 

 spheroidal form" of M. undulata. The varietal name is of no value until the 

 originals of the figures or topotypes can be studied. 



MONOTRYPELLA Ulrich. Genotype: M. sequalis Ulrich. 



Monotrypella Ulrich, Jour. Cincinnati Soc. Nat. Hist., 5, 1882, p. 153. Foord, 

 Contr. Micro-Pal. Cambro-Sil., 1883, p. 15. Foerste, Bull. Sci. Lab. Denison' 

 Univ., 2, 1887, p. 171. Hall and Simpson, Pal. New York, 6, 1887, p. xiii. 

 Miller, N. A. Geol. Pal., 1889, p. 196. Ulrich, Geol. Surv. Illinois, 8, 1890, 

 pp. 377, 451; Zittel's Textb. Pal. (Enlg. ed.), 1896, p. 278. Simpson, 14th 

 Ann. Rep. State Geol. New York, for 1894, 1897, p. 581. Nicklesand Bassler, 

 Bull. U. S. Geol. Surv., 173, 1900, p. 30. Pocta, Syst. Sil. du Centre Bohemc, 

 8, pt. 1, 1902, p. 316. Ulrich and Bassler, Smiths. Misc. Coll., Quart., 47, 

 1904, p. 43. Grabau and Shimer, N. A. Index Fossils, 1, 1907, p. 131. Cum- 

 ings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 749. Bassler, 

 Zittel-Eastman Textb. Pal., 1913, p. 336. 



Monotrypella aequalis Ulrich. 



Monotrypella aequalis Ulrich, Jour. Cincinnati Soc. Nat. Hist., 5, 1882, p. 247, 

 pi. 11, figs. 3-3b; Geol. Surv. Illinois, 8, 1890, fig. 3b (p. 308), fig. 4a (p. 309).- 

 J. F. James, Jour. Cincinnati Soc. Nat. Hist., 16, p. 201. Simpson, 14th Ai 

 Rep. State Geol. New York for 1894, 1897, figs. 154-156 (p. 582). Ulrich anc 

 Bassler, Smiths. Misc. Coll., Quart., 47, 1904, p. 44. Cumings, 32d Ann. 

 Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 856, pi. 20, figs. 4-4c. 



Eden (Economy): Covington, Kentucky. 



HolotypeC&t. No. 43684, U.S.N.M. 



Monotrypella? arbuscula (Hall). 



Chsetetes fruticosus Hall, 32d Ann. Rep. New York State Mus., 1879, p. 



(reprint, 1880, p. 10); Rep. State Geol. New York for 1882, 1883, pi. 9, 



figs. 1-8. 

 Chsetetes (Monotrypella) arbusculus Hall and Simpson, Pal. New York, 6, 1887, 



p. 12, pi. 9, figs. 1-3 (?4, 5), 6-8. 

 Monotrypella? arbusculus Grabau, Bull. New York State Mus., 92, 1906, p. 117, 



fig. 26. 

 Helderbergian (Manlius transition beds): Schoharie, New York. 



MONOTRYPELLA BRIAREA Ulrich. See Eridotrypa briareus. 

 MONOTRYPELLA CONPLUENS Foerste. See Homotrypa? confluens. 



Monotrypella? consimilis (Hall). 



Chsetetes? consimilis Hall, 28th Ann. Rep. New York State Mus., doc. ed., 

 1876, pi. 9, figs. 7-14; 28th Ann. Rep. New York State Mus. (mus. ed.), 1879, 

 p. 110, pi. 9, figs. 7-14; llth Ann. Rep. Indiana Geol. Nat. Hist., 1882 

 p. 230, pi. 8, figs. 7-14. 



Monotrypella consimilis Ulrich, Jour. Cincinnati Soc. Nat. Hist., 5, 1882, p. 248. 



Niagaran (Waldron): Waldron, Indiana. 



MONOTRYPELLA CRASSIMURALIS Ulrich. See Rhombotrypa crassimuralis. 

 MONOTRYPELLA MULTITABULATA Ulrich. See Hallopora multitabulata. 

 MONOTRYPELLA QUADRATA Ulrich. See Rhombotrypa quadrata. 

 MONOTRYPELLA SUBQUADRATA Ulrich. See Rhombotrypa subquadrata. 

 MONOTRYPELLA TRENTONENSIS Ulrich. See Eridotrypa trentonensis. 



