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Show PLATE 5. Page* FIG. 1. PUYLLOCBRAS RAMOSUS ; side view, reduced to about two- thirds the natural diameter 371 1 a. Outline profile view of same. 1 b. Part of a septum of same, showing the siphonal and first lateral lobes and the siphonal sinus, magnified. Fio. 2. AMMONITES COMPLEXUS, var. SUCIAENSIS; side view of a medium- sized specimen from Komooks, reduced to about two- thirds the natural diameter 369 2 a. A part of a septum of same, enlarged. 2 b. A larger specimen from Sucia Island, being a worn internal cast, rc-duoed as above. 2 c. Profile view of same. The siphonal lobes of the septa in this figure are traced in from the smaller specimen represented by fig. 2 of same plate. |