414 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



1 15469. Monodonta basilea Guppy. Holotype. 



Oligocene. Jamaica, British West Indies. 



Guppy, Geol. Mag., London, Dec, II, I, 1874, p. 434, pi. 16, fig. 2. 

 = Modulus basileus. 



12364. Monopleura marcida White. Cotypes. 



Edwards (Cret. ). Near Austin, Texas. 



White, Bull. No. 4, U. S. Geol. Surv., 1884, p. 8, pis. 3, 4. 



12365. Monopleura pinguiscula White. Cotypes. 



Edwards (Cret.). Near Austin, Texas. 



White, Bull. No. 4, U. S. Geol. Surv., 1884, p. 8, pi. 5. 



35313. Monopteria alata Beede. Plesiotype. 



Rico (Upper Carb.). Scotch Creek. Rico quadrangle, 

 Colorado. 

 Girty, Prof. Pap. No. 16, U. S. Geol. Surv., 1903, p. 431, pi. 9, fig. 3. 



15595. Monopteria marian White. Cotypes. 



Upper Carboniferous. Camp Apache, Navajo County, 

 Arizona. 



White, Prelim. Rept. U. S. Geogr. Surv. W. 100th Merid., 1874, 

 p. 22; Rept. U. S. Geogr. Surv. W. 100th Merid., IV, Pt. I, 

 1877, p. 151, pi. 11, figs. 4a-4c 



3958. Monotis hawni Meek and Hayden. Cotypes. 



Permian. Smoky Hill River, Kansas. 



Meek and Hayden, Trans. Albany Inst., IV, 1858, p. 76. 



= Pseudomonotis hawni. 

 See Eumicrotis hawni. 



30192. Monotis semiplicata Hyatt. Cotypes. 



Triassic. American Canyon, California. 



Hyatt, Bull. Geol. Soc. Amer., V, 1894, p. 414. 



30193. Monotis symmetrica Hyatt. Cotypes. 



Triassic. American Can3 r on, California. 

 Hyatt, Bull. Geol. Soc. Amer.,V, 1894, p. 414. 



43556. Monotrypa (Chaetetes?) cumulata Ulrich. Holotype and 



figured sections. 

 Trenton (Ord.). Goodhue County, Minn. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. I, 

 I 893, P- 307, pi. 27, figs. 26, 27. 



43553. Monotrypa intabulata Ulrich. Holotype and figured 



sections. 

 Trenton (Ord.). Goodhue County, Minn. 



Ulrich. Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. I, 

 lS 93> P- 3°5» fig. 20. 



