218 SYSTEMATIC PALEONTOLOGY 



This form resembles the original figures of Eulima subulata Donovan, 

 and those given by Wood ' and ])y Hoernes." Till comparison can be 

 made with authentic specimens of that species it is best to retain the 

 American name. 



Length, 7.5 mm. ; diameter, 1 mm. 



Occurrence. — St. Mary's Formation. St. Mary's River, Cove Point, 

 Langley's Bluff. Choptank Formation. Governor Eun (lower bed). 

 Calvert Formation. Plum Point. 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 U. S. National Museum, Philadelphia Academy of Natural Sciences, 

 "Wagner Free Institute of Science, Cornell University. 



Genus NISO Risso. 



ISTiso lineata Conrad. 

 Plate LIII, Fig. 13. 



Bonellia lineata Conrad, 1841, Proc. Acad. Nat. Sci. Pbila., voL i, p. 3^. 



BonelUa lineata Conrad, 1842, Jour. Acad. Nat. Sci. Phila., voL viii, 1st sen, p. 188. 



Bonellia lineata Conrad, 1842, Proc. Nat. Inst., BulL ii, p. 183. 



Bonellia lineata Conrad, 1848, Proc. Acad. Nat. Sci. Phila., vol. iii, p. 21, pi. i, 



tig. 23. 

 Nixo lineata Conrad, 1863, Proc. Acad. Nat. Sci. Phila., vol. xiv, p. .566. (In part.) 

 Niso lineata Meek, 1864, Miocene Check List, Smith. Misc. Coll. (183), p. 17. 

 ? Niso lineata Conrad, 1866, Amer. Jour. Conch., vol. ii, p. 69, pi. iv, fig. 13. 

 Niso lineata Dall, 1892, Trans. Wagner Free Inst. Sci., vol. iii, pt. ii, p. 245, pi. xx, 



fig. 4. (In part.) 

 Niso lineata Harris, 1893, Amer. Jour. Sci., ser. iii, vol. xlv, p. 2.5. 



Description. — " Subulate, polished, with obsolete spiral lines, distinctly 

 visible only on the body whirl; a spiral line margins the suture at base 

 of each volution, causing the suture to appear profound; this line is con- 

 tinued on the middle of the body whirl." Conrad, 1841. 



Conrad pul)lished two figures supposed to be of this species. The first 

 is good and makes the species absolutely certain even if the description 

 were insufficient. The second figure is bad and led Dall (who over- 

 looked the earlier one) to suggest that H. C. Lea's name, simplex,^ .should 



' A Monograph of the Crag Mollusca, vol. i, p. 97, pi. xix, fig. 3. 



' Die Fossilien Mollusken des Tertiaer-Beckeus von Wien, Band i, p. 547, Taf. xlix, 

 fig. 20. 



'^Actceon simplex H. C. Lea, 1845, Trans. Amer. Philos. Soc, vol. ix, p. 32, pi. xxxvi, 

 fijr. 62. 



