348 
NAUTILOIDEA. 
After describing the shell, sutures, &c. of the present fossil, 
Edwards says that the siphuncle is “ moderately large, and is placed 
on the dorsal part of the septal disk, halfway between the centre 
and the margin.” Ho adds, “ So far as the general character can be 
ascertained, the siphuncle does not appear to differ from that of 
Nautilus, and certainly does not present any analogy with the wide 
trumpet-mouthed funnel which distinguishes AtuHa.'^ 
The largest chamber in Parkinson’s specimen measures 9 inches 
in height and 7 in breadth ; and this chamber was not the last, and 
consequently not the largest in the entire shell. 
Edwards thus relates the history of this remarkable fossil : — 
“ Parkinson, in his work above cited [‘ Organic Remains,’ 1811, 
p. 105J, described the remains of a Nautilus, purchased by him at 
the sale of Dr. Henish’s collection. These remains, which consist 
of three chambers, afterwards came into the i^ossession of Mr. 
Sowerby, who has placed them at m)’ service. Parkinson was 
ignorant of the locality whence they came ; but from their minera- 
logical character, the matrix being, in fact, the substance known as 
cement-stone, it was supposed that they were found at Harwich. 
Lately the Rev. Thomas Image, of Whipstead, near Bury St. 
Edmunds, has forwarded to me for examination similar remains, 
unquestionably obtained at Harwich, and consisting of the casts of 
two chambers, rather smaller than those in Parkinson’s specimen, 
and in a matrix precisely similar. The question, therefore, as to 
the locality of Parkinson’s specimen is set at rest.” 
The sutures of this species bear a somewhat close resemblance 
to those of Aturia Basteroti, Benoist^ ; but the siphuncle in the 
latter is described as even larger than that of Aturia Aturi, and 
its affinities are, on the whole, clearly not with the present species. 
Benoist’s specimen, it may be mentioned, is large, the figures, 
which are half the natural size, measuring about 4 inches in their 
greatest diameter. 
Eurther observations on this species are embodied in the descrip- 
tion of the genus Aturia (supra, p. 341). 
Horizon. London Clay (Lower Eocene). 
Localities. Harwich, Colchester ; Essex. 
Represented in the Collection by two specimens, the one from 
Harwich (No. 43869) in the “ Sowerby Coll.” 
^ Actes de la Soc. Lirm. de Bordeaux, vol. xlii. Fev. 1889, ser. v. livr. i. p. 22 ; 
Atlas, livr. ii. Juin 1889, pi. ii. ff. 2 a, 2 b. 
