246 SYSTEMATIC PALEONTOLOGY 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

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

 Cornell University. 



Crucibulum constrictum Conrad. 

 Plate LVIII, Fig. 11. 



DispotcPM constricta Conrad, 1842, Proc. Nat. Inst., Bull, ii, p. 194, pi. i, fig. 2. 

 DispoUea constricta Conrad, 1845, Fossils of the Medial Tertiary, No. 3, p. 80, pi. 



xlv, fig. 4. 

 Crucibulum constrictum Conrad, 1863, Proc. Acad. Nat. Sci. Phila., vol. xiv, p. 568. 

 Criicihulum co7istrictuni Meek, 1864, Miocene Check List, Smith. Misc. Coll. (183), 



p. 15. 

 Crucibulum co7istrictum Dall, 1892, Trans. Wagner Free Inst. Sci., vol. iii, pt. ii, 



p. 3.50. 



Description. — " Shell irregular, elevated; laterally compressed, marked 

 with simple lines of growth ; apex prominent, with one or two minute 

 volutions; diaphragm very profound." Conrad, 1842. 



"Very irregular, elevated, laterally compressed; transversely rugose; 

 apex submedial, very prominent, obliquely inclined, and with 1 or 2 

 minute volutions; diaphragm extremely profound, adhering by nearly 

 half the circumference of the margin." Conrad, 1845. 



Height, 10 mm. ; length, 12 mm. ; width, 8 mm. 



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

 Langley's Bluff. 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 U. S. National Museum. 



Crucibulum multilineatum Conrad. 

 Plate LYITI, Figs. 12a, 12b. 



Dispotiea multilineata Conrad, 1843, Amer. Jour. Sci., vol. xli, p. 346, pi. ii, fig. 7. 

 Dispot(ea multilineata Conrad, 1845, Fossils of the Medial Tertiary, No. 3, p. 80. 

 Crucibulum multilineata Tuomey and Holmes, 1856, Pleiocene Fossils of South 



Carolina, p. 107, pi. xxv, fig. 7. 

 Crucibulum multilineatum Emmons, 1858, Kept. N. Car. Geol. Survey, p. 276, fig. 192. 

 Crucibulum multilineatum ConTa,&, 1863, Proc. Acad. Nat. Sci. Phila., vol. xiv, p. 568. 

 Crucibulum. multilineatum Meek, 1864, Miocene Check List, Smith. Misc. Coll. (183), 



p. 1.5. 

 Crucibulum multilineatum Dall, 1892, Trans. Wagner Free Inst. Sci., vol. iii, pt. ii, 



p. 351. 



