XArXILOIDEA. 
Nautilus Labechei, d’Archiac and Haime. 
1854. Nautilus Lahechei, d’Arcliiac and Ilaime, Description des Ani- 
maux Fossiles du Groupe Nummulitique de Tlnde, livr. ii. p. 338, 
pi. xxxiv. ff. 13, 13 a, 13 h. 
1854. Nautilus minor, Carter, Summary of the Geology of India, 
between the Ganges, the Indus, and Cape Comorin, Journal of the 
Bombay Branch of the Royal Asiatic Society, vol. v. p. 254. 
1857. Nautilus Lahechei, Carter, ibid., reprinted with “ Footnotes,” 
in “ Geological Papers on Western India, &c.,” edited by II. J. 
Carter, p. 700 (foot-note). 
? 1875. Nautilus Lahechei, Owen, “ On Fos.sil Evidences of a Sirenian 
Mammal from the Nummulitic Eocene of the Mokattam Cliffs, 
near Cairo,” Quart. Journ. Geol. Soc. vol. xxxi. p. 103. 
1880. Nautilus Lahechei, Fedden and Blanford, Mem. Geol. Surv. of 
India, vol. xvii. p. 210. 
1800. Nautilus Lahechei, Foord and G. C. Crick, Ann. Mag. Nat. Hist, 
ser. 6, vol. v. p. 391. 
Sp. Char. Shell (oast) rapidly expanding, subglobose, the sides 
slightly flattened, the periphery broadly rounded ; greatest width in 
the umbilical region. Umbilicus very small ; perhaps closed when 
the shell is present. Septa approximate ; sutures very slightly 
waved. Siphuncle situated close to the dorsal (inner) margin of 
the septa. 
Remarks. This species somewhat resembles the Nautilus centralis 
of J. Sowerby, from the London Clay, but the septa are closer 
together, and the siphuncle is differently situated. The present 
species is represented in the British Museum by two specimens 
(No. 36943), one of which, a body-chamber, with two septa at- 
tached, shows the position of the siphuncle. 
Horizon. Lower Eocene? 
Locality. Sind, India. 
Represented in the Collection by two examples. 
shown in the preceding paper (Mr. Blanford’s) on the Greology of Sind, to tell 
from which particular horizon the fossils described by d’Archiac and Haime 
were obtained. It now appears that, instead of these fossils being exclusively 
Eocene, some are older and many newer, a large pi oportion being Miocene.” 
Mr. Fedden adds that his list is by no means complete, and that there are 
many new species yet to be described and named. 
As we are concerned only with the Cephalopoda, it will suffice to say that all 
the species at present recognized, viz. Nautilus sub-F/euriausianus, d’Archiac, 
N. Beluci, d’Arch., N. Lahechei, d’Arch. and Haime, and A. Forbesi, d’Arch. 
and Haime, are from the Eanikot Group, which is supposed to be of Lower 
Eocene age; with one exception. A". Laberhei, which is put down arranging 
from the Cretaceous to the Lower Eocene. 
