192 
NAUTILOIDEA. 
Professor Blake \ who examined the type of Phillips’s X annu- 
laris, considered it to he only a variety of JV. striatus. 
The ornamentation of the test of N. striatus is remarkably beau- 
tiful ; it consists of a series of tolerably regular, wavy, longitudinal 
ridges, about three in the space of a line, covering the whole surface 
of the shell, one or two fine lines occupying the space between two 
of the ridges. Pine lines of growth cross the ridges, cutting them 
into a number of minute crenulations. Some of the lines of growth 
are raised into coarse folds on the sides of the shell, beginning in 
the umbilicus, but they become nearly obsolete upon the periphery 
and die out altogether in the adult shell. In the latter the sculp- 
ture becomes very coarse, the longitudinal ridges being now from 
one to nearly two lines distant from each other, the interspaces 
being occupied by fine lines, as in the younger shell. The ridges 
vary in strength in all stages of growth, finer ones being intercalated 
among the coarser. 
The ornamentation of the adult shell may be well seen in the 
specimen numbered C 1941. There is a conspicuous internal 
(dorsal) lobe in the sutures of the septa. 
j\\ striatus is recorded by Tate and Blake ^ from the following 
localities in Yorkshire : — Zones of Ammonites planorhis, Cliff ; A. 
angulatus, Cliff*, Kedcar, Eaton Pitt ; A. Bucllandi, Redcar, Marske, 
Ellerbeck. The species referred to in some of these localities is 
probably the iY astacoides of Young and Bird (q. v.). 
Horizon. Lower Lias. 
Localities. — British. Lyme-Regis, Dorsetshire ; Tewkesbur}", 
Cheltenham, Gloucestershire ; Bugbrook, Northamptonshire. — 
Foreign. Filder, Degerlock, near Stuttgart, Wurtemberg ; Randen, 
near Schaffhausen, Switzerland. 
The Collection contains several very fine specimens, including one 
of Sowerby’s original types (the specimen numbered 43852 a in the 
Sowerby Collection), and a specimen (No. 18) presented by Sir 
H. De la Beche. 
Nautilus intermedius, J. Sowerby. 
1816. Nautilus intennedius, J. Sowerby, Miu. Conch, vol. ii. p. 53, 
pi, exxv. 
1830. Nautilus squamosus {?) , Zieten, Les Petrifications de Wurtemberg, 
livr. i. p. 24, tab. xviii. ff. 3, a-e. 
‘ Tate and Blake, ‘ The Yorkshire Lias,’ 187^, p. 312. 
Ibid. 
