226 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



38156. Dieconeura rigida Scudder. Holotype. 



Upper Coal Measures. Campbells Ledge, near Pittston, 

 Pennsylvania. 



Scudder, Mem. Boston Soc. Nat. Hist., Ill, 1SS5, p. 336, pi. 29, 

 fig. 10; Foss. Insects N. America, I, 1890, p. 300, pi. 16, fig. 4. 



35358. Dielasma bovidens ( Morton J? Plesiotype. 



Upper Carboniferous. Rock Creek, Elk Mountains, Col- 

 orado. 



Girty, Prof. Pap. No. 16, U. vS. Geol. Surv., 1903, p. 409, pi. 7, 

 "figs. 11, 11a. 



See Terebratula bovidens. 



35179. Dielasma utah (Hall and Whitfield). Holotype and 



15239. plesiotype. 



Madison (Miss.). Crowfoot Ridge, Gallatin Range, Yel- 

 lowstone National Park. 

 Waverly (Miss. ). Cottonwood divide, Wahsatch Range, 

 Utah. 



Girty, Mon. XXXII, Pt. II, U. S. Geol. Surv., 1899, p. 544, pi. 69, 

 figs. 6a, 6b, 6c. 



See Terebratula Utah. 



Dikellocephalus. See Dieellocephalus. 



107135. Dillwynella errata Guppy. Holotype. 



Upper Oligocene. Pointapier, Trinidad, West Indies. 

 Guppy, Proc. U. S. Nat. Mus., XIX, 1S96, p. 323, pi. 27, fig. 2. 



5947. Dillwynella naticoides (Lea). Plesiotypes. 



Claibornian (Eocene). Claiborne, Alabama. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. II, 1892, 



p. 41S, pi. 18, fig. 3. 



41641. Dilobella typa Ulrich. Cotypes. 



Black River (Ord. ). St. Paul, Minnesota. 



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

 1894, p. 673, pi. 46, figs. 30-34. 



4797. Diloma ( Chlorodiloma | ruderata Dall. Holotype. 



Miocene. Penjinsk Gulf, Siberia. 



Dall, Proc. U. S. Nat. Mus., XVI, 1893, p. 476, pi. 56, fig. 3. 



113799. Dimya grandis Dall. Cotypes. 



Oligocene. Potrero, Rio Amina, Santo Domingo. 



Dall, Proc. U. S. Nat. Mus., XIX, 1896, p. 328; Trans Wagner 

 Free Inst. Sci. Phila., Ill, Pt. IV, 1898, p. 764, pi. 35, fig. 8. 



45548. Dinobolus ? parvus Whitfield. Plastotype. 



Trenton (Ord. ). Wykoff, Minnesota. 



Winchell and Schuchert, Geol. and Nat. Hist. Surv. Mian., Final 

 Rept., Ill, Pt. I, 1893, p. 356, figs. A and C. 



