ill!Ill

3 6 4
Fig. 116.
Lamella oculata.
LAMELLA.
B. Rudimentary false septa reduced to knobs.
GENUS 74. LAMELLA BRUN, 1894.
Valves bacillar, dilated at the median
portion and at the apices ; the latter with
hyaline inflations. Girdle face showing
bosses (false rudimentary septa ?) clearly
displayed and very smooth.
This genus has been proposed by Prof. Brun
for a fossil form found in Totata, Oamaru, New
Zealand, L. oculata Brun, which will be found
represented in the text.
COHORT OF SURIRELLINE^E.
Tribe XVI. Surirelle^.
Valves undulated transversely, undulations visible in the girdle face, striate,
and showing several bands transversely shaded . . . Cymatopleura.
Valves not
transversely
undulate. j
'
Valve elliptic, sometimes constricted in the middle, furnished
with a pseudo-raphe crossed at the median portion
and longly bifurcated at the . longitudinal apices Hydrosilicon.
f Valves cuneate, furnished with costae and
beads; valves flat, without alas . Podocystis.
Valves flat or spirally torsive, furnished
Raphe not with costas
j
and moniliform striae, frusbifurcate.
tules alate . . . Surirella.
Valves saddle-shaped, with pseudo-raphe
arranged in the two valves in the form
[_ of a cross . Campy
lodiscus.