338 



arclied. Base ^flat, separated from peripheral keel by a deep 

 groove ; ornamented with about eight spiral ridges. 



Aperture quadrate : columella thinly reflected. 



Dimenttioiis. — ^Length, 14: breadth, 4. 



Locality. —Eocene : Table Cape (Ten.- Woods, common I). 



Has a resemblance to T. pngoclula, Tate, but is a narrower 

 shell, and differs in the details of the ornamentation : from 

 T. granulifera, T.-Wds., to which it bears some resemblance by 

 its smooth posterior keel and its prominent anterior one. 



5. Turritella StUPtii, TenUon- Woods. PL viii., tig. 6. 



Shell small, acutely pyramidal : whorls fifteen in a length of 

 12 mm., apex of three small smooth rounded turns ; ordinary 

 whorls constricted at the suture, spirally ribbed ; prominent ribs 

 three, equidistant, of which the median and anterior ones are 

 granulose, the posterior one often double, each interspace with 

 about two fine spiral threads : growth-lines deeply arched. Base 

 flattened, angulated at the margin, with seven or eight equal- 

 sized spiral threads, crossed by numerous very flne stride. Aper- 

 ture subquadrate ; outer-lip thin : columella thinly reflected 

 behind and over the base. 



Dimensions. — Length, 22 : breadth, 5-25. 



Locality. — Eocene : Abundant in the " Turritella beds," Table 

 Cape (Tenison- Woods .' ). 



6. Turritella gemmnlata, spn-. nor. Pi. viii., fig. ]i. 

 Shell minute, narrow lanceolate-turreted ; apex of one and 



a-half turns, the tip globulose, the next turn convex, narrow ; 

 whorls nine (excl. embryo), flatly concave, but separated by a 

 broad, deeply impressed suture ; ornamented by beaded ribs, 

 decreasing in number from front backwards from Ave or six to 

 three, the next but one to the anterior suture usually with the 

 largest granules : the last three spire-whorls bi- or uni-carinate. 

 Periphery of body-whorl rounded, base with about Ave encircling 

 threads ; aperture rotund, columella thinly reflected. 



Dimensions. — Length, 6-5 ; width, 1-75. 



Localities. — Eocene : Muddy Creek (not uncommon !) ; Bird- 

 rock Blutt', Spring Creek (rare I). 



7. Turritella tristira, Tate. PI. viii., fig. 8; PI. x., fig. 3. 



Ref.-^Vvoc. Roy. Soc, Tasmania, for 1884, p. 227 (1885). 



Shell acuminately turreted ; apical angle about 15° ; whorls 

 seventeen, anterior and medial whorls slightly convex, suture 

 linear; apex globulose of one and a half whorls, the tip im- 

 mersed, the first four or five spire-whorls flatly convex, the next 

 three or four medially concave. Surface ornamented with three 

 conspicuous, acute, spiral ribs, the interspaces with closely and 



