yo Bulletin 9 263 



Aldrich" s original description. — "Shell gaping above, elongated, 

 sub-cylindrical; the anterior and central part of surface marked 

 with concentric ribs, balance of posterior smooth. A strongly 

 impressed groove running from the beak to the ventral margin, 

 the concentric ribs being more pronounced on the sides of this 

 groove. 



"Beaks strongly recurved towards the anterior, situated close 

 to this end, which is truncate. 



''Locality.— Y^Aow BlufF, Ala., Bell's Landing Group." 



"This species was taken from a piece of lignite by D. W. 

 Langdon Jr. The shell has the markings of the dorsal accessory 

 plate." 



Type. — Herewith refigured, Aldrich's colledlion. 



Lucina greggi. Pl. 14^ figs. 2, 2a? 



Syn. L. greggi Har., Proc. Acad. Nat. Sci., Phila., 1896, p. 478, pl. 22, 

 fig- 6. 



Harris" origifial description. — Size and general form as indi- 

 cated by the figure ; marked exteriorly with concentric lines not 

 deeply incised ; interior with two diverging cardinal teeth and an 

 anterior lateral ; anterior muscular scar very large and extending 

 from the anterior lateral tooth to the basal margin of the shell ; 

 posterior muscular scar comparatively small, rotund ; 

 interior naturally (or by disease) much thickened or calloused, a 

 shallow channel extending from a little above the upper margin 

 of the posterior muscular scar, obliquely to near the base of the 

 anterior scar. 



"A small specimen, magnified in fig. 5, [2a.] and probably of this 

 species, shows an extremely, deeply excavated ligament pit, re- 

 minding one of L. claytonia. In the old type specimen, this pit 

 broadens out and the ligament seems to be attached very much as 

 in Dosiyiia. 



''Locality. — Alabama: Gregg's Landing. 



Type. — Lea Memorial Colledtion, in Acad. Nat. Sci., Phila. 



Lucinia pomilia. Pl. 14, fig. 3, a. b. 



Syn. L. pomilia Con., Foss. Sh., Tert. Form, p. 40, 1833. 



L. impressa Lea, Cent, to Geol., p. 37, pl. i, fig. 30, 1833. 



L. pomilia Con., Amer. Jour. Sci., vol. i, p. 402, pl. 4, fig.17, 1846. 



L. pomilia Aid., Bull, i, Geol. Surv. Ala., p. 57, 1886. 



