NArilLID.E, 
315 
Professor F. Johnstrup ^ to the of Beck ^ belongs in reality 
to the present species. Beck’s species, though recognized by Lund- 
gren, was apparently never described. Lundgren speaks of it as 
represented by a fragment contained in the Berlin Museum (?). 
Horizon. Fpper Chalk. 
Locality. Faxoe, Denmark. 
Nautilus (Hercoglossa) Trichin op olitensis5 Blanford. 
1851, Nautilus TrichinopoUtensis, Blanford, Mem. Geol. Surv. India 
— Paleeont. Indica — i. Foss. Ceph. of the Cretaceous Rocks of 
Southern India, p. 37, pi. xxiii., pi. xxiv. £f. 1, 1 a, 2, pi. xxv. 
ff. 3, 3 u. 
1866. Nautilus TricMnopolitensis, Stoliczka, ibid. p. 212. 
1879. Nautilus TrichinopoUtensis, Medlicott and Blanford, Manual of 
the Geology of India, pt. i. p. 284. 
Sp. Char. “ Shell discoid, compressed, ornamented with strong 
flexuous ribs, continuous to the umbilicus, acutely angulated on the 
hack, and separated by narrow deeply cut grooves, which are faintly 
impressed on the cast. Umbilicus moderate with sloping sides ; 
inner whorls concealed. Ventral area evenly rounded. Aperture 
ovate, narrower in front, sometimes flattened at the sides. Septa 
deeply sinuated, forming a rounded, compressed lobe above the 
middle of the whorl. The base of the lobe is evenly rounded on 
both sides. On the ventral [peripheral] surface the edges of the 
septa [sutures] are either straight or slightly concave, the latter 
generally in old specimens. Siphuucle rather large, situated at three 
fourths the height of the septum. 
“ This well-marked species is confined to the Arrialoor Group \ 
and appears to be of very local occurrence. The specimens are 
principally casts, but in good preservation.” {Blanford.) 
Remarks. This species is derived from the lower part of the Ari- 
alur Group, and is found in Koloture, Arialur, and Mullur, in the 
Trichinopoly district. 
Stoliczka, in his revision of the Nautili of the Cretaceous rocks of 
Southern India (see table of reference above), observes that the 
umbilicus in the present species is “ sometimes closed, but always 
with a distinct funnel-shaped depression ; other specimens are dis- 
1 Om Faxekalken ved Annetorp i Skaane ; i Oversigt Kongl. Dansk, Vidensk. 
Selsk. Forhandl. for 1866, no. 6, p. 258. 
2 “Notes on the Geology of Denmark,” Proceed. Geol. Soc. 1835, vol. ii. 
p. 218. 
See ‘ Manual of the Geology of India,’ by H. B. Medlicott and W. T. Blan- 
ford, pt. i, 1879, p. 280. 
