336 
NA.UTILOJDKA. 
Atiina Aturi . — a, frout view of a specimen (No. 8(>8.‘3-S) partly broken open, 
showing 1. I, I, orifices of the lateral lobes of the septa ; .« if, siphuncle: 
b, lateral view of the variety australu (No. C. 1548), showing the closed um- 
bilicus and the fine lines of growth. Drawn from specimens in the British 
Museum, a is reduced to about two thirds of the natural size ; b is nearly 
full size. 
Aturia Periphero-lateral view of part of the interior of the same 
specimen as that represented in Fig. 71, a, showing I, I, lobes of the septa 
(those on the right-hand side of the figure are broken off), s, s, necks of 
the septa, forming the calcareous funnel-shaped invaginated sheaths in 
which the fleshy siphuncle was contained ; c, swollen band or collar at the 
entrance of the funnel. The figure is about two thirds natural size. 
