NATJTILID-S. 
325 
1863. Nautilus elliptio.us, Schafbautl, Siid-Bajerns Lethaea Geog- 
nostica, — Der Kressenberg und die siidlicli von ihm gelegenen 
Hochalpen, p. 214, Taf. Ivii. and Taf. Iviii. 
1890. Nautilus ellipticus, Foord and G. 0. Crick, Ann. Mag. Nat. Hist, 
ser, 6, vol. v. p. 391. 
Sp. Char. Shell (cast) somewhat compressed on the sides, rather 
narrowly rounded on the periphery ; greatest width in the umbilical 
region ; umbilicus closed. Septa rather approximate ; sutures 
nearly straight on the periphery, but bent strongly backwards on 
the sides, and forming a conspicuous, forwardly directed lobe on the 
margin of the umbilicus, into which they abruptly descend. Si- 
phiincle not seen, 
Remai'hs. This species bears a considerable resemblance to 
Nautilus impenalis., J. de C. Sowerby, and it may possibly be 
identical with that species ; but its mineral condition, in common 
with that of the other species from Kressenberg, prevents any 
definite determination as to its affinities from being arrived at. 
N. ellipticus is represented in the Collection by two examples, the 
largest of which (No. C. 3402) measures 8| inches in its greatest 
diameter. The smaller one (No. C. 1003) is the more perfect of the 
two, and has furnished the data for the above description of the 
species. It was presented to the British Museum by Mr. J. E. 
Lee, Esq., F.G.S. 
Horizon. Eocene. 
Locality. Kressenberg, Upper Bavaria. 
Nautilus macrocephalus, Schafhautl. 
1863. Nautilus macrocephalus, Schafhautl, Siid-Bayerns Ijethaca 
Geognostica, — Der Kressenberg und die siidlich von ihm gelegenen 
Hochalpen, p. 215, Taf. liv. ff. 2, a-c. 
1890. Nautilus macrocephalus, Foord and G. C. Crick, Ann. Mag. Nat. 
Hist. ser. 6, vol. v. p. 391. 
Sp. Char. Shell (cast) inflated, nearly as wide as high, slightly 
compressed on the sides, broadly rounded on the periphery. Um- 
bilicus open, small. Septa rather approximate ; sutures forming a 
conspicuous, forwardly directed lobe near the edge of the umbilicus, 
then bent backwards on the sides, and passing over the periphery 
without any curvature. Umbilicus (according to Schafhautl's 
figure) very near the dorsal (inner) margin of the septa. 
Remarhs. This species reminds one of Nautilus centralis., J. Sow., 
of which it may be a giant form, but its characters are too little 
known to warrant any definite conclusion as to its affinities. 
