56 BuLivETiN 9 248 



V. rotunda van Aid., Bull, i, Geol. Surv. Ala., p. 57, 1887. 



Conrad'' s original description. — See Bull. Araer. Paleont. as 

 above. The general form of this variety is certainly that of V. 

 rotunda lyca, but the costation is different, in fadt very similar to 

 alticostata, i. e. towards the anterior the exterior crenulated por- 

 tion of each rib is superimposed on a broader base, which in turn 

 is sometimes on a second base and the latter upon the shell itself. 

 This form is found at Gregg's landing, Lower Peach Tree, and 

 perhaps at Nanafalia. 



Smaller, but more nearly typical specimens of this species are 

 found in abundance in the upper Lignitic at Woods bluff and 

 Ozark, Ala. 



Specimens figured. — Gregg's I^anding ; Paleont. Museum, 

 Cornell University. 



Astarte smithvillensis, var. Pl. y\, fig. 2. 



Syn. A. conradi Buckley, ist Bull. Ann'l Rep't Geol. Surv. Tex., p. 63, 



1874. 

 Crassatella alta (young) Heilp., Cent, to Geol., p. 38, 1884. 

 Astarte nicklensii A\di., Bull, i, Geol. Surv. Ala., pp. 50-53, 1886. 

 Astarte tellinoides Aid., Bull, i, Geol. Surv. Ala., p. 53, 1886. 

 Astarte tellinoides Heilp., Proc. Acad. Nat. Sci. Phila., 1890 p. 402. 

 Astarte smithvillensis var. Har., Proc. Acad. Nat. Sci. Phila., 



1886, p. 475, pi. 20, fig. 6. 

 A. stnithvillensis Har., Proc. Acad. Nat. Sci. Phila., 1895, p. 48, 



pi. I, figs. 8, a, 9, a, b, c. 



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

 cated by the figures ; surface in typical specimens marked by 

 strong concentric rugae, especially towards the base ; these slope 

 gently above but abruptly below and are superimposed by fine 

 striae ; umbones flattened. 



' 'This species shows great variations in form and size as well as 

 markings. At Collier's Ferry some specimens are more elong- 

 ated, others more rotund ; some have crenulations on the anterior 

 sub-margin while others are smooth." Typical locality and hori- 

 zon, Smithville, Texas, lyower Claiborne. 



Localities (lyignitic). — Woods Bluff and Ozark, Ala. 



Type. — Texas State Museum. 



Specimen figured. — Woods Bluff, lyca Memorial colle(5tion in 

 Acad. Nat. Sci., Phila. 



Crassatella tumidula, PI. n, figs. 3, 4. 



