408 Systematic Paleontology 



Haminea mortoni (Forbes) Weller 



Bulla mortoni Forbes, 1845, Quart. Jour. Geol. Soc, London, vol. i, p. 63, 



text fig. a. 

 Bulla mortoni Meek, 1864, Check List Inv. Fossils, N. A., Cret. and Jur., 



p. 16. 

 Solidula mortoni Conrad, 1868, Cook's Geol. of New Jersey, p. 728. 

 Bulla mortoni Conrad, 1868, Ibidem. 

 Bulla mortoni Whitfield, 1892, Mon. U. S. Geol. Survey, vol. xviii, p. 165, 



pi. xx, figs. 7-9. 

 Bulla conica Whitfield, 1892, Ibidem, p. 189, pi. xxiii, figs. 12, 13. 

 Bulla mortoni Johnson, 1905, Proc. Acad. Nat. Sci., Phila., p. 19. 

 Haminea mortoni Weller, 1907, Geol. Survey of New Jersey, Pal., vol. iv, 



p. 812, pi. xcix, figs. 14, 15. 



Description. — " (Cast.) Ovate, inflated, resembling in form B. liydatis, 

 spire concealed, surface spirally furrowed, the furrows bearing traces of 

 punctation." — Forbes, 1845. 



Type Locality. — New Jersey. 



Shell involute, perforate, globose, ovate to subcylindrical in outline, 

 constricted basally; body whorl well rounded, medially inflated; external 

 surface sculptured with close-set, faintly incised spirals; aperture more 

 produced than the body whorl in front and behind, rather narrow and 

 slightly arcuate posteriorly, broader and strongly patulous anteriorly; 

 outer lip thin, sharp, straight medially, rounded at the extremities; 

 parietal wall free from callous ; columella feebly reinforced, non-plicate. 



Haminea mortoni (Forbes) is separated from Haminea cylindrica by 

 the much more inflated outline with the consequently greater constriction 

 at the base of the body. 



Occurrence. — Matawan Formation. Three-quarters of a mile below 

 Ulmstead Point on the Magothy River, Anne Arundel County. 



Collections. — Maryland Geological Survey, Philadelphia Academy of 

 Natural Sciences, II . S. National Museum. 



Outside Distribution. — Monmouth Formation. Navesink marl, New 

 Jersey. Selma Formation. Exogyra costata zone, Wilcox County, Ala- 

 bama ; east-central Mississippi. 



