XAUTILID-E. 
Nautilus Geelongensis. — a, front view, showing the position of the siphuncle ; 
h, lateral view ; c, a detached septum, showing the dorsal lobe of the 
sutures in the young shell. Drawn from a specimen (No. 0. 1568) in the 
British Museum. About one third natural size. 
Australian Tertiaries ; apparently the only Cephalopod recorded 
from them being the Aturia australis^ M‘Coy\ 
Horizon. Miocene ? 
Localiiy, Near Geelong (Victoria), Australia. 
Nautilus (Hercoglossa) Cassinianus, Foord and 
G. C. Crick I 
1890. Nautilus {Hercoglossa) Cassinianus, Foord and G. C. Crick, 
Ann. Mag. Nat. Hist. ser. 6, vol. v. p. 408, f. 9. 
Sp. Char. Shell compressed, with flattened sides and narrowly 
rounded periphery. Greatest thickness in the region of the um- 
bilicus ; the latter closed. Septa approximate, sutures forming a 
sharply bent, forwardly-directed lobe after leaving the umbilicus, 
then bent backwards in a similar lobe, and Anally directed forwards 
towards the periphery, which they cross with a narrow arch. 
Siphuncle situated below the centre. 
Remarlcs. This species closely resembles Nautilus {Hercoglossa) 
Danicus, but is easily distinguished by its more compressed whorls 
and the position of its siphuncle. It may be added that the close 
^ Geol. Surv. of Victoria, Rep. of Progress, 1874, p. 36. Also Prodr. of the 
Palseont. of Victoria, decade iii. 1876, p. 21, pi. xxiv. ff. 1-5. 
^ Aturia Cassiniana, Edwards, MS. 
