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 T 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, 11th 

 Ann. Rep. State Geol. New York, for 1894, 1897, p. 581 .— Nickles and Basyler, 

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

 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 acqualis Ulrich. 



Monotrypella ajqualis 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 Ann. 

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

 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. 



Hololype— Cat. No. 43684, U.S.N.M. 



Monotrypella? arbuscula (Hall). 



Chsetetes fruticosus Hall, 32d Ann. Rep. New York State Mus., 1879, p. 148 



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



figs. 1-8. 

 Chaetetes (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. 

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



Monotrypella briarea Ulrich. See Eridotrypa briareus. 



Monotrypella confluens Foerste. See Ilomotrypa? confiuens. 



Monotrypella? consimilis (Hall). 



Chaetetes? 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; 11th 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. 



