374 
NAUTILOIDEA. 
N’umerous specimens of upper mandibles (No. C. 1527) from the 
Oxfordian of Hieges (Basses-Alpes) are of a slightly more elongate 
form than JR. Larus^ and are referable to d’Orbigny’s R. Coquand- 
ianus 
A single upper mandible (No. 73987) from the Neocomian of 
Cheiron (Basses-Alpes) agrees tolerably well with d’Orbigny’s de- 
scription of his Rhynchoteutliis alatus^, but in the absence of figures 
its identification is very difficult. 
There are numerous detached mandibles, both upper and lower, 
in the Collection from the Lias of Charmouth and Lyme Begis, 
Dorsetshire (Nos. 35054 and 46754), which present different 
characters from any of those above referred to. Perhaps if careful 
search were made, some of these mandibles might be discovered in 
connexion with the cephalopod to which they belong, or at least in 
such a position as to warrant a safe assumption as to their affinities — 
that is, supposing they belonged to any shell-bearing Cephalopod, or 
to a Belemnite. 
List of Ehyncholites described under specific names 
Carbonifeeous. 
Rhyncholithes? F. A. Eoemer, Palieontogi'apbica, 1854, Baud iii. 
p. 52, tab. viii. fig. 17, a-c. 
Triassic. 
Rliyncholithes acuminatus, Merian, Neues Jahrbuch, 1887, p. 727. 
Conchorhynchus avirostris, Bronn, Lethaea Geognostica, zweite Aufl., 
1837, Band i. p. 182 ; Atlas, Taf. xi. fig. 16, a-e. 
Cassianus, (Herm. v. Meyer) Klipstein, Beitrage zur geologisch. 
Kenntn. der ostlichen Alpen, 1843, p. 145, Taf. ix. fig. 7, «, b. 
Rhyncholithus duplicatus, Miinster, Beitrage zur Petrefactenkunde, 1843, 
Heft i. p. 70, Taf. v. figs. 4, 5 {—Conchorhynchus duplicatus, 
d’Orb.). 
RhynchoUtes Gaillardoti^, d’Orbigny, Ann. des Sci. Nat. 1825, vol. v. 
p. (219). Figured, ibid. vol. ii. p. 485, tab. xxii. figs. 3-14. 
^ MoU. Viv. et Foss. 1847, vol. i. p. 597. 
^ Paleont. Fran 9 ., Terr. Oret., Suppl. 1847, p. 27. Many of the plates 
referred to in this volume were never published, and amongst them those in 
which the present species should have been figured. 
^ 1 have endeavoured to make this list as complete as possible. 
4 This appears to be the Conchorhynchus avirostris, Bronn. 
