Turritella from Buda and Georgetown Limestones 9 



We have only the one specimen, found in the Buda limestone 

 at Austin, Texas. 



A species that resembles ours is Turritella elicita, Stol- 

 iczka, from the Arrialoor formation of India, but it has 

 characteristics not found on this species and is from a much 

 later formation. 



Number of specimens. 1. 



Occurrence. Buda limestone, Shoal Creek, Austin, Texas. 



Turritella washitensis, n. sp. 

 Plate I, figures 5, 6 



Dimensions. Apical angle, about 16, sutural angle 8. 



Description. Shell tall, turreted, volutions seven or more 

 in number, aperture unknown, spire high, whorls are con- 

 vex and broader than high, suture well impressed, the pos- 

 terior rib of the whorls borders the sutural line which lies 

 in a deeply impressed channel. Surface of the whorls is 

 ornamented with six rounded nodular ribs. The anterior 

 rib appears smaller than the other five which are equal. 

 The spaces between the ribs are plain and are slightly nar- 

 rower than the width of the ribs. 



Number of specimens. 1. 



Occurrence. Basal Buda limestone, Onion Creek, Austin, 

 Texas. 



Turritella bartofiensis, n. sp. 

 Plate II, figures 1, 2, 3 



Dimensions. Apical angle 16, sutural angle 8V2 . 



Description. Shell elongated, slender, composed of eight 

 or more whorls, suture well impressed, sides of whorls 

 nearly flat, aperture slightly oval. The ornamentation con- 

 sists of four equal, square, nodular ribs. Between each pair of 

 ribs is found a plain thread, and before the anterior rib are 

 found two plain threads, which cause the anterior portion 

 of the whorl to appear slightly beveled. In addition to this 



