NATJTILID^. 
349 
Aturia Delphinus, Forbes, sp. 
1846. Nautilus Delphinus, Forbes, Fossil Invertebrata from Southern 
India, Trans. Geol. Soc. ser. ii. toI. vii. p. 98 (woodcut, p. 99). 
1850. Megasiphonia Delphinus, d’Orbigny, Prodr. de Paleont. Stratigr. 
Yol. ii. p. 309. 
1870. Stoliczka, Additional Observations regarding 
the Cephalopodous Fauna of the South-lndian Cretaceous Deposits ; 
Records Geol. Surv. of India, vol. i. p. 32. {Not of Schlotheim.) 
[Ab^ 1861. Nautilus Danicus, Blanford, Mem. Geol. Surv. of India — 
Palaeont. Indica — Foss. Ceph, Cret. Rocks of Southern India, 
p. 24, pi. X. ff. 4, 4 a, pi. xi.] 
Fig. 75. 
Aturia Delphinus. — a, lateral view, showing some of the sutures; h, front -view, 
showing the large orifice of the siphuncle, and (above it) the openings of 
the septal lobes. Drawn from a specimen (No. 23282) in the British 
Museum. About two thirds natural size. 
Sp. Char. “ This species is much compressed, especially dorsally ; 
the angles of the mouth project so as to give the aperture a hastate 
or triangular form. The surface of the only specimen is too much 
worn to be made out clearly. The septa are remarkably sinuous ; 
laterally and nearly in the centre they make a bend, the sweep of 
which is abruptly curved and directed towards the umbilicus so as 
to form a sort of triangular lobe, resembling in form a porpoise’s 
fin^, and angulated at its superior base, whence the line crosses the 
back in a slightly undulated curve . . .” {Foi'hes.') 
^ Hence the name Delphinus. 
