Marwick.—The Struthiolariidae. 161 
The Struthiolariidae. 
By J. Marwick, M.A., N.Z. Geological Survey. 
[ Read, by permission of the Director of the N.Z. Geological Survey, before the Wellington 
Philosophical Society, 9th August, 1922 ; received by Editor, 31st December, 1922 ; 
issued separately, 6th com 1924.] 
: Plates 11-15. 
Family STRUTHIOLARIIDAE Fischer, 1884. 
PART L—GENERIC CLASSIFICATION. 
Ix his invaluable Essais de ne comparée, Cossmann (1904, 
p. 106) tabulates the family as follows 
Genus. E Section, 
Struthiolaria. iolar ке» 
Beak agris sepp to the Columellar эб thin and Lip bisin 
basal sinuosity. Srailripss 
Lip unkno 
Pelicaria. юрен 
Thick layer of enamel on the — Sutural excavation. 
spire. 
In addition there is Struthiolarella Steinmann and Wilckens, separated 
as a апр ӨЧЕН | in 1 
Zemira Н. and A. Adams was placed in the family by Hedley (1899, 
р. 118) [кен of the curved columella and the presence of a spur оп the 
outer lip, but the nature of the latter is quite different from that of the 
projection on the lip of Struthiolaria. The little spur on the lip of Zemira 
owes its origin to the spiral channel on the anterior portion ot the body- 
whorl, as in Ancilla and Pseudoliva ; but in Struthiolaria there is no spiral 
channel, the two projections on the outer lip not being dependent on the 
spiral sculpture. In addition the opercula are different, so it does not seem 
advisable to include this genus in the Struthiolariidae. 
SrRuTHIOLARIOPSIS Wilckens, 1904. 
Genotype: Fusus i Philippi. 
The value and systematic position of this genus are by no means 
established. It was жи in this family because of the strong eri on 
the base, thus resembling t t 
American members. DUE UR iA 
rightly considered the creation of 
the genus on the material available 
(Wilekens, 1904, pl. 18, fig. 5), 
however, shows that the course of 
the growth-lines of the outer lip 
is the same as that of Belophos, 
which. has. many ee repre- Fic. 1.—a. “(after Wicke ferrieri. (Phil.). 
(After Wilckens. 
sentatives in Now Zeland, Other дар lt on 
concave Бойын. with fine spirals, much stronger spirals below, and the 
presence of axial sculpture. A figure of the New Zealand Belophos 
6—Trans. 
