NAUTILI D.E. 
119 
de Kon., non Sow.) b}’ the possession of fine ridges in the young 
shell, and crenulations in the later stages of growth, and also by 
the lesser amount of enrolment, whereby the outer keel of the 
umbilicus is exposed in the inner whorls. The sutures also are 
more sinuous in paucicarimitus than in pinguis. 
Honzon. Calcaire Carbonifere (Assise 1^), = Carboniferous Lime- 
stone. 
Locality. Tournai, Belgium. 
Well represented in the Collection. 
Coelonautilus Koninckii, d Orbigny, sp. 
1844. Nautilus cariniferus ^ de Koniuck, Descrip, des Auim. Foss, du 
Terr. Carbonifere de la Belgique, p. 549, pi. xlviii. If. 11, a, b, aud 
12. {Not of J. de C. Sowerby.) 
? 1844. Nautilus {Temnocheilus) crenatus, ]\FCoy, Synop. Carboniferous 
Foss. Ireland, p. 21, pi. ii. f. 9. 
1847. Nautilus Koninckii, d’Orbigny, Paleont. Universelle, vol. i. pi. 
xcv. ff. 1-C. 
1849. Nautilus Konmckii, d’Orbigny, Prodr. de Paleont. Stratigr. 
vol. i. p.lll. 
1852. Nautilus Kunincki, Giebel, Fauna der Vorwelt, Band iii. Ahtli. i. 
p. 172 (excl. synon.). 
1852. Vestinautilus Koninckii, Ryckholt, Notice sur les Genres Nautilus, 
Vestinautilus, See. p. 5, pi. — f. i. 
1854. Nautilus Koninckii, Pictet, Traitd de Paleont. vol. ii. p. G23, 
plate 50. Hg. 5. 
1856. Nautilus cariniferus, F. Roemer, in Bronn’s Lethoca Geognostica, 
3te Aufl. Band i. p. 490, Taf. i. 1, If. 9, a, b. {Not of J. de C. 
Sowerby.) 
1872. Nautilus Koninckii, Hyatt, Bull. Mus. Comp. Zool. Harvard Coll. 
Cambridge, Mass., vol. iii. No. 5 (Embryology), p. 91, pi. iv. tf. 7, 
8, 9 (apex). 
1878. Nautilus Koninckii, de Koninck, Faune du Calcaire Carbonifere 
de la Belgique (Annales du Mus. Roy. d’Hist. Nat. de Belgique, 
tom. ii.), p. 137, pi. xxx. ft'. 1-5. 
1883. Vestinautilus Koninckii, Hyatt, Proc. Boston Soc. Nat. Hist, 
vol. xxii. p. 295. 
Sp. Char. Shell thick, discoid, composed of three volutions, just 
touching each other, excepting at the extreme apex ; umbilicus deep 
on both sides of the shell, and having a very large perforation in 
the centre. Prof. Hyatt ^ found that “ one fine specimen of Nautilus 
Koninckii, from Tournai, had apparently a smooth termination ; ” 
the longitudinal plications reaching only a little beyond the second 
Bidl. Mus. Comp. Zool. Cambridge, 1872, vol. iii. No. 5, p. 75. 
