78 BuLi^ETiN 4 19a 



Pleurotoina (^Surcula) ostrarupis, PI. 7, fig". 13. 



Syn. PI. ostrarupis Harris, MS. prepared for 5th Ann'l Rep't 

 Geol. Surv. Tex., pi. 15, fig. 5. 



Harris' original description. — "This is only a fragment and 

 cannot be fully characterized. The more obvious and peculiar 

 features are: (a) the rather fine, oblique, and somewhat curved 

 longitudinal costse which in all probability disappear on the 

 larger whorls of adult, and i^b) the reg"ular spiral striation. 



''Locality. — Sta. 104, Smiley's bluff, Bra2X)s river, two miles 

 above the mouth of Pond creek, Milam Co. 



''Geological horizon. — Midway Eocene. 



" In the collection of the U. S. Nat. Mus., a specimen occurs 

 among others marked ' Pleiirototna persa Whitf.' by Aldrich. 

 All came from Matthews' Landing. This particular specimen 

 is evidentl}^ not P. persa, but, as far as can be determined, should 

 be labelled P. ostrarupis.'' 



This species is quite common in material from Matthews' 

 Landing". When entire the general outline of the shell is not 

 far from that of PL anacona. A small specimen is in the Pal. 

 Mus., C. U., from i mile west of Oak Hill. 



Type. — Texas State Museum. 

 Pleurotoma sp. , PI. 7, fig. 14. 



This seems to be the forerunner of the Wood's Bluff form 

 called by Heilprin in Proc. Ac. Nat. Sci., Phila., 1880, p. 374, 

 " Pleuroto7na acuminata? Sower by." Its spire is not so high as 

 the Lignitic form, and its costse are fewer and more prominent, 

 and its columella is more deflected at base. Nevertheless, since 

 but one specimen of this variety is at hand, it seems inadvisable 

 to designate it at present by any particular name. 



Locality. — Alabama: Dale's Branch, near Oak Hill, Wilcox Co. 



Specimen figured. — Paleontological Museum, Cornell Univ. 



Pleurotoma longipersa n. sp., PI- 7, fig- i5- 



Specific characterization. — General form as indicated by the 

 figure; spire of about seven whorls; i, 2 and 3 smooth, 4 costate, 

 these are embryonic; remaining spiral whorls with a subsutural 

 band traversed by a revolving line, below with fine lines of 

 growth and alternating spiral lines; carinations of 5 and 6 

 obliquely and faintly costate. 



This species resembles P. persa and P. gabbi; from the former 

 it is distinguished by its much more constricted sutures and the 



