JTEWTOy AXD HAEEIS : B£rn>H EOCEXE CEPHAIX)PODA. 131 



the shell -wall ; dorsal portions of the septa prolonged backwar'ls 

 forming a large, margiaal, fxinnel-shaped siphuncle, which is, perhaps, 

 the most characteristic feature of the genus, and easily distinguishes 

 it from Hercogloiiia. 



Atiteia Chaeliswoethi, Foord. 



Nautilus ziczac, Charlesworth. — ^J^ag. Xat. Hist. 1837, n.s., vol. i. 



p. 533, fig. 66 (■woodcut), non J. Sowerbv, 1812. 

 Ataria ziczac, Bronn, var. B., Edw. — Mon. Pal. Soc. 1849, p. 53, 



jjI. ix. figs. \g, l/<. 

 Aturia Charhisfcorthi, Foord. — Cat. Foss. Ceph. British Museum, 



1891, part 2, p. 346. E. B. Xewton. — Syst. List 



Edwards Coll. British Museum, 1891, p. 291. 

 Differs from A. ziczac in being more compressed, almost discoidal, 

 narrower on the ventral aspect ; dorsal lobes not so broad ; aperture 

 more elongated ; septa very approximate, thirteen in a complete whorl. 

 Extremely rare. 



Formation. — London Clay, Locality. — Primrose HiU. 



Atxteia ziczac, J. Sowerby. 



Naittilm ziczac, J. Sby. — Mineral Conchology, 1812, p. 12, pi. i. (lowest 

 figure). Desh. — Coq. Foss. Paris, 1835, voL ii. p. 765, 

 pL c. figs. 2, 3. 



Aturia ziczac, Edw. — Mon. Pal. Soc. 1849, p. 52, pi. ix. figs, \a-\f. 



? Clymenia ziczac, J. de C. Sbv. — Dixon's "Sussex," 1850, pp. ilO, 

 194, pi. viii. fig. 19. 



Aturia ziczac, Desh. — Desc. Anim. sans Tert. 1865, vol. iii. p. 628. 



Foord, Cat. Foss. Ceph. British Museum, 1891, pt. 2, 



pp. 342, 344, figs. 74^-745. E. B. Xewton.— Svst. List 



Edwards Coll. British Museum, 1891, p. 292. 



Shell smooth, more or less ventricose, septa approximate and 



outwardly deeply concave, the lateral lobes taper rather suddenly 



towards the inferior extremity, siphxmcle close to the dorsal margin. 



Eather rare. 



Formations and Localities. — Bracklesham Beds : Bracklesham Bay. 



London Clay : Sheppey, Haverstock Hill, Highgate, near Chalk 



Farm, and Hampstead. 



EXPLAXATIOX OF PLATE X. 



Fig. 1. — Belosepia sepiovdea, dorsal view. 



„ 2. — ,, ,, Tentral view. 



,, 3. — „ ,, lateral view. 



,, 4. — Sereoglossa Cassiniaiui, siphonal xiew. 



,, 0. — ,, ,, septal view. 



