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Petrushevskaya 1971


Figure 11

Cephalic structure of some Nassellaria, according to H. Foreman.
I) Cyrtentactinia primotica (according to Foreman, 1963); II-IV) cephalis with branching spine Vert, posteriorly, laterally and from above (compare with fig. 9, III, IV and fig. 14, II, III); V-VII) Amphipyndax in the same positions; V) vertical spine Vert; VB) branches of vertical spine. Other designations as in fig. 8.