KArTILIDJ2. 
195 
shire ; ^ya^kwo^th, Xorthamptonshire. — Foreign. E.anden, near 
Schaffhausen, Switzerland ; Uhrweiler, Alsace. 
y ell represented in the Collection. Specimens numbered C. 484, 
C. 2963, and C. 2964 have no localities recorded against them. 
Nautilus simillimus, Foord and G. C. Crick. 
1890. Nautilus simillimus, Foord and G. C. Crick, Ann. & Mag. Nat. 
Hist. ser. 6, vl4. v. p. 267, f. 1. 
Fig. 34. 
Nautilus stiuilli/nus.— a, lateral view of a \oung individual, showing the closed 
urabilicus ; />, peripheral view. Drawn from a specimen (No. 89887) in 
the British Museum. Nearly two thirds natural size. 
Sjy. Char. “ Shell somewhat compressed on the sides, narrowly 
rounded on the periphery, completely involute. Umbilicus closed 
by a shelly callus. Septa moderately di^^tant ; sutures slightly 
curved on the sides of the shell and forming a shallow sinus upon 
the periphery. Siphuncle unknowm. Test ornamented with fine, 
close-set, subregular, wav}', longitudinal ridges, which are some- 
what coarser on the sides of the shell than on the periphery ; finer 
lines are intercalated between these, and the whole are crossed by 
fine and numerous lines of growth, which impart a cancellated ap- 
pearance to the test, especially in young shells. In addition to the 
finer ornaments there are a series of obscure folds radiating from 
the umbilicus, and dying out upon the periphery. 
o2 
