396 RALPH TATE. 
Aperture elongate piriform, columella with two oblique plications. 
Length 7, breadth 25 mm. 
Eocene, Belmont, Victoria. 
Genus Cordieria. 
Sinus near the suture, two or more columella plications, canal 
short. 
CORDIERIA CONOSPIRA, spec. nov. (Plate 19, fig. 12.) 
Thala marginata, Tenison-Woods.* 
The transference of the Table Cape species, described by Tenison- 
Woods as Thala marginata, to either Borsonia or Cordieria renders 
a change of specific denomination. Borsonia marginata was 
described by Deshayes in 1864 and was included by Cossmann,” 
in his section Phlyctenia, which was subsequently recognised by 
him to be synonymous with Cordieria; in M. Cossmann’s’ work 
it is listed as Cordieria marginata. 
C. conospira has considerable analogy with C. marginata, 
Deshayes, both agreeing in having a conic embryo and thus differ 
from other congeneric species, but otherwise it is nearer to ¢. 
turbinelloides, Deshayes; apart from its much larger size, C. 
conospira differs particularly by finer costation and the possession 
of three to four oblique plaits at the anterior part of the columella. 
The embryo is conic and consists of four moderately conve™ 
smooth whorls; the first spire-whorl is rather closely costated. 
An average sized specimen measures long. 12, lat. 4-5 mm., but 
an extreme form has long. 17 and lat. 7 mm. 
Eocene: This species occurs abundantly at most of its localities. 
Table Cape, Tasmania; Muddy Creek, Mornington and Gellibrand 
River, Victoria ; River Murray Cliffs, South Australia. 
Genus Mitromorpha, A. Adams. 
The shells herein included have the aspect of Conomitra, the 
columella with two strong plaits which do not extend inwards ; 
Sy i 
1 Proc. Roy. Soc., Tasmania, 1877, p. 108. 
- Cat. Ill. Coq. Foss., rv., p. 248, 1889. 
3 Essais Palwoconchologie, 11., p. 100, 1896. 
