ORTMANN : TERTIARY INVERTEBRATES. 235 



In Australian Tertiary deposits we have representatives of the group 

 of V. triplicata in V. serissa Tate and V. tateana Johnst. (see Tate, 1889, 

 p. 129, pi. 2, f. i, and p. 132, pi. 2, f. 5), the first from the Miocene beds 

 of the River Murray Cliffs, the second from the supposed Eocene (?) beds 

 of Tasmania. 



Fam. CANCELLARIID^E Ad. 



Gen. CANCELLARIA Lmck. 

 162. CANCELLARIA GRACILIS v. Ihering. 



PI. XXXVI, Fig. 3"-*. 



1897 C- g- v - Ihering, in: Rev. Mus. Paul., v. 2, p. 310, pi. 3, f. 11. 

 1899 C. g. var. major v. Ihering, in: N. Jahrb. Miner., etc., v. 2, p. 35, 

 pi. 2, f. 10. 



Shell ovato-fusiform, elongate, not umbilicated. Whorls ^]/ 2 to 8. 

 Spire acuminate. Whorls convex, near the suture, in the upper part, 

 indistinctly angulated, suture deep. Surface with 10 or 11 longitudinal 

 ribs, crossed by spiral cords. Mouth oval. Outer lip crenulated within. 

 Columella with two subequal plaits. Canal short, slightly curved. 



Height, 12 mm; diameter, 6 mm. 



Remarks : Our complete specimen is a little smaller than the original 

 one described by v. Ihering in 1897, but agrees with it completely, 

 with the exception that it has only 45^ whorls (5^ in v. Ihering's 

 specimen). 



But it seems that this species attains a very much larger size ; the 

 individual described by v. Ihering in 1899 as var. major has 8 whorls, and 

 is 43 mm high, but otherwise it much resembles this species, with the excep- 

 tion that there are 4-5 smaller plaits on the columella in addition to the two 

 larger ones ; but this may be due to age. 



This species is very closely allied to the following, but differs in the 

 more elongate form, less distinctly angulated whorls, and number of 

 longitudinal ribs. 



Record of specimens : Mt. of Observation, upper horizon, i sp.; San 

 Julian, Darwin Station, i cast. 



Distribution: Patagonian beds of Santa Cruz, and Suprapatagonian 

 beds of La Cueva (v. Ih.). 



