39 LiGNiTic Stage 39 



Localities. — Alabama: Woods bluff; 3 miles southwest of 

 Thomasville, near Cho<fla\v corner. 



Type and specimen figured. — Near Choclaw corner ; Paleont. 

 Mus., Cornell University. 



Mitra pergracilis, V\. 4, fig. 10. 



Syn. /uisciolaria pcrjivcicilis Aid., Geol. Surv. Ala., Bull, i, p. 22, pi. 5, 

 fig. iS, 1886. 



Aldricli's original descripi ion. — "Shell narrowly fusiform ; 

 spire very slender; suture inipres.sed; whorls thirteen, nucleus com- 

 posed of three smooth ones, the following .seven are longitudinally 

 ribbed, balance nearly smooth ; two equi-distant revolving 

 grooves, (the one nearest the suture the largest) border it 

 throughout. 



"Canal long, spirally striated ; outer lip smooth ; columella 

 bearing posteriorly three faint oblique plaits far within the aper- 

 ture. 



''Locality. — Gregg's landing, Alabama." Also, according to 

 Aldrich p. 56, at Bell's, Lower Peach Tree and Tuscahoma. 



The plaits are very small indeed and are generally but two in 

 number. The plaits are not located sufficiently anteriorly to 

 indicate affinities with the genus Fasciolaria. Nor are tlie 

 plaits like those of typical Mitra, yet the general ornamentation 

 and shell strudlure indicate a close relationship with the Mitrse. 

 Cossmann has strangely enough confounded this with Exilia 

 pergracilis with which it has no relation. 



Type. — Aldrich's collecftion. 



Specimen figured. — Gregg's landing, Alabama : Paleont. 

 Museum, Cornell Universit)'. 



Mitra hatchetigbeensis, I'l. 3. fig- n. 



Syn. M. hatclietigbecnsis .\1(1., Bull, i, (^eol. vSurv. .\l;i., p. 2S, pi. 6. 

 fig. 3, 1886. 



Aldrich's original description. — "Narrow fusiform ; whorls 

 about ten ; suture impressed ; nucleus smooth ; upper whorls 

 longitudinally ribbed, carinate at their center and tuberculated ; 



