1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 295 



JURASSIC SPECIES— Continued. 



Lingula bievirostris (M. & II.) Wbitf. 



Rep. Geol. Black Hills of Dakota, p. 346, pi. iii, figs. 4, 5. Mus. No. 12310. 



liioplacodes veternus M. & II. 



Pal. Upper Missouri, <Smitb,sonlan Cont. to Know. 172, p. 116, fig. on p. 116. Rev, 

 Non-Marine Foss. Moll., p. 04 or 470, pi. iii, fig. 9. Mus. No. 1978. 

 Lyosoma powelli White. 



12tli Ann. Rep. U. S. Geol. & Geogr. Surv. Terr., p. 153, pi. xxsviii, figs. Ga-d. 

 Mns. No. SHI. 



Myacites nebrascensis M. & H. 



Pal. Upper Missouri, <Smithsoniau Cont. to Know. 172, p. 100, pi. iv, fig. 5. Mus, 

 No. 210. 

 Myacites subcompressus (Meek) White. 



12tb Ann. Rep. U. S. Geol. & Geogr. Surv. Terr., p. 151, pi. sxxviii, figs. 5«-*. Mus. 

 Nos. 8061, 818J. 



Myacites subellipticus M. &. H. 



Pal. Upper Missouri, ^Smithsonian Cont. to Know. 172, p. 101, pi. iv, fi'gs. 6, a-c 

 Mas. No. 200. 

 Myacites (Pleurrmya) weberensis Meek. 



Rep. Geol. Expl. 40th Parallel, vol. iv, p. 137, pi. xii, figs. 11, a. Mus. No. 13386. 



Myophoria ambilineata White. 



Rep. Geogr. & Geol. Expl. & Surv. west 100th Meridian, vol. iv, p. 166, pi. xiii, 

 figs. 5ft, b. Mus. No 8586. 



Mytilus whitei Whitf. 



Rep. Geol. Black Hills of Dakota, p. 360, pi. v, tigs. 9-12. Mus. No. 12312. 



Mytilus whitei (Whitf.) White. 



Pith Ann. Rep. U. S. Geol. & Geogr. Surv. Terr., p. 147, pi. xxxvii, fig. 9a. Mus. 



No. bl77. 



Natica ? lelia H. & Whitf. 



Rep. Geol Expl. 40th Parallel, vol. iv, part ii, p. 298, pi, vii, figs. 19-21. Mus. No. 

 12536. 

 * Neeera longirostra Whitf. 



Rep. Geol. Bhick Hills of Dakota, p. 376, pi. v, fig. 35. Mus. No. 12327. 

 t Neritella nebrascensis M. & H. 



Pal. Upper Missouri, <[Smithsouian Cont. to Know. 172, p. 109, figs, on p. 109. 

 Rev. Non-Marine Foss. Moll., p. 51 or 457, pi. iii. Mus. No. 1979. 



Neritina ? phaseolaris White. 



Rep. Geogr. & Geol. Expl. Surv. w. 100th Meridian, vol. iv, p. 167, pi. xiii, figs. 

 la-d. Mus. No. 8587. 

 Ostrea engelmanni (Meek) M. & H. 



Pal. Upper Missouri, <^Sniith.souian Cont. to Know. 172, p. 73, fig. A ol p. 73;. 

 Rev. Foss. Ostreidaj N. A., p. 289, pi. xxxiv, figs. 4 & 5. Mus. No. 1884. 

 Ostrea engelmanni ? (M. & H.) H. <fe Whitf. 



Rep. Geol. Surv. 40tb Parallel, vol. iv, part ii, p. 285, pi. vii, fig. 12. Mus. No. 12.534. 



Ostrea strigilecula White. 



Re]). Geogr. & Geol. Expl. & Surv. w. 100th Meridian, vol. iv, p. 163, pi. xiii, fig. 

 3rf. Rev. Foss. Ostreidaj N. A., p. 289, pi. xxxv,fig. 11. Mus. No. 8581. 



Ostrea strigilecula (White) Whitf. 



Rep. Geol. Black Hills of Dakota, p. 348, pi. iii, figs. 8-10, 12. Mns. No. 12318. 

 Fig. 11. Mus. No. 12271. 



* I cannot recognize the type, but it is marked as such by the author of the speciea. 

 t Dr. White, in the Non-Marine Foss. Mollusca, refers this species to Neritina. 



