DESCRIPTIONS OF SPECIES. 63 



Jewett, Texas; Elm Creek, Lee County, Texas; San Augustine, Texas; 1 

 mile below Sliipps Ford, Bastrop County, Texas; Alabama BluiF, Trinity 

 River, Houston County, Texas. 



Flabbllum cuneiforme var. acutiforme var. nov. 

 PI. III. figs. 11) and 20. 

 This species lias almost no lateral wings just above the pedicel. Its 

 form is triangular, and the sides meet at a decidedly acute angle, about 50°. 

 The basal portion of the corallum is compressed and slender. 



Mm. 



Greater diameter of calice 26. 2o 



Lesser diameter of calice 1'- 



Heiglit of corallum ^"^ 



Lo,3,ities.— St. Maurice, Louisiana; and Mississippi. 



Geologic occurrence. LoWCr ClaiborUC. 



Types. — United States National Museum. 



Flabbllum cuneiforme var. fragile var. nov. 

 PI. Ill, lig. -'1. 



This is a variety found abundantly at McLeod's mill, Suwonlovey 

 Creek, Clarke County, Mississippi; it presents some peculiarities of 

 note. ' The coralla are compressed, attached by short pedicels; a small lat- 

 eral wing exists on the edges of the lower half of the corallum, above the 

 pedicel. Low, rounded distinct costfe correspond to every fourth septum. 

 The epithecfi is not polished, and the impressed lines marking the median 

 septal planes are nearly always very distinct. The bottom of the corallum 

 not filled up by internal (lei)osit, as in var. pachyphyUnm. The corrallum is 

 quite fragile au"d tends to In-eak across along the growth curves. The ^-ariety 

 is usually smaller than the other ^•arieties, but it grades directly into 



pachiphyUum. 



\dditionanocauty.— Bakers Bluff, Alabama (collection of T. H. Aldrich). 

 Geologic horizon.— Claibornian, or immediately below the Claiborne sands 



horizon. 



Types. — United States National Museum. 



