NAUTILI DJE. 
213 
point of fact, this median line or ridge is the ‘ Normallinie ’ of the 
Brothers Sandberger and cannot be used as a specific character, 
since it is found not only in numerous species of the jN^autilidse, but 
also in some species of the Orthoceratidae. 
“ The following species are evidently closely related, viz. : — 
yautilus lineatus, N. jpseudolineatus^ sp. nov., N. pohjgonalis'^, and 
y. (jlabe>\ sp. nov.” {Foord and G. C. Crick.') 
Horizon. Inferior Oolite. 
Localitij. Yeovil, Somersetshire. The specimen already referred 
to as bearing one of Sowerby’s labels {j’ Nautilus lineatus^ M. C. 41 ”) 
is not localized. 
Well represented in the Collection. 
Nautilus pseudolineatus, Foord and G. C. Crick. 
1890. Nautihis, sp. nov., Foord and G. C. Crick, Ann. & Mag. Nat. Hist, 
ser. 6, vol. v. p. 222, f. 3. 
1890. Nautihis pseudolineatusj Foord and G. C. Crick, Ann. & Mag. 
Nat. Hist. ser. 6, vol. v. p. 277, f. 9. 
Sp. Char. “ Shell subcompressed, flattened upon the sides and 
periphery, the latter being moderately broad and having a sub- 
angular border. Umbilicus closed. Whorls about three, increasing 
rather slowly in diameter. Body-chamber occupying about half a 
volution ; aperture wider than high. Septa rather deeply concave, 
nineteen or twenty in the last whorl, the last two very approximate. 
Sutures forming a sigmoid curve on the sides of the shell and a slight 
sinus on the periphery. Siphuncle rather large, suhcentral. Test 
thick, smooth. Anterior border of muscular impression well defined, 
broadly arched (see fig. 42). 
Remarks. “ The greatest diameter of the largest specimen in the 
Collection (No. C. 324) is 6| inches. 
“ The slow rate of increase of the whorls in this species is its dis- 
tinguishing character. It is nearly allied to N. lineatus, Sow., hut 
differs therefrom in its more distant and flexuous sutures, more 
concave septa, the position of its siphuncle, and its slower rate of 
increase.” {Foord and G. C. Crick.) 
Horizon. Inferior Oolite. 
Localities. Sherborne, Bridport, Burton-Bradstock, Dorsetshire ; 
Yeovil, Somersetshire. A fine specimen — a section (No. C. 324 h ) — 
^ ‘ Die Versteinei'ungen des rheiniseben Schichtensystems in Nassau,’ G. and 
F. Sandberger, 1850-56, p. 41. 
^ J. de C. Sowerby, Min. Conch, vol. vi. p. 56, pi. dxxx. 
