6o Bulletin ii 6o 



tradled, less than half the length of the shell ; base very 

 slightly reflecfted." From Claiborne. 



Lignitic locality. — Alabama ; Woods bluff. 



Type. — Academy of Natural Sciences, Philadelphia. 



Specimen figured. — Paleontological Museum, Cornell Univer- 

 sity. 



Mitrella mississippiensis. PI- 7, fig- i4- 



Syn. Coliunbella Jiiississippiensis, Aid. and M'r. Jr., Cinn. Soc. Nat. 

 Hist., vol. 9, pt. 2, p. 43, pi. 2, fig. 17, 1886. 

 C. mississippiensis. Aid., Bull. Am. Pal., vol. i, p. 65, pi. 2, figs. 

 19, 19 a. 



Aldrich and Meyer's original description — "Spire elevated. 

 Whorls nine, slightly convex; the last four with an impressed line 

 along the suture. Base of body whorl spirally striated. Colu- 

 mella excavated, anteriorly with three tubercles. Outer lip 

 thickened, crenulated within by about seven striae, of which one 

 in the middle is the largest. Newton." 



Aldrich remarks {loc. cit. p. 65) that the Woods bluff form 

 "differs from the typical only by the plaits on the columella being 

 nearly obsolete." 



Type. — Aldrich' s colledlion. 



Specimen figured. — Aldrich ' s colledlion ; from Woods bluff. 



Mitrella alabamensis. PI- 7, fig- ^5 



Syn. Latirus alabamensis Aid., Bull. Am. Pal. vol. i, p. 63, pi. 21, fig. 17 

 For AldricK s otdginal description. — ^Loc. cit. ) 



I am inclined to think this and the following are both members 

 of the ColnmbellidcB. Though they do' not conform in general out- 

 line to typical Mitrella, they are perhaps as near that as any other 

 established genus. 



Locality. — Ala.: Hatchetigbee. 



Type and specimen figured. — Aldrich's collection.* 



