248 Dr. H. Falconer on the alleged Occurrence of Flint Knives 
the outer margin. Height 0:2 inch, greatest breadth 
0°32 inch. 
This shell resembles H. pudica, Drouet, in shape, but is much 
larger. It is also distinguished by the bands of colour. It is, 
with Achatina octona, the commonest of land shells in Trinidad, 
and it is the only species of mollusk I have ever observed on the 
guava (Psidium pomiferum), a plant which is shunned by most 
animals on account of its strong aromatic taste and smell. 
The foot of the animal is acutely pointed behind; the eyes 
quite sessile on the outer side of the tentacles, which are long 
and obtusely pointed. The hairy periostraca of the shell readily 
comes off, and is rarely seen in cabinet examples. 
The lingual dentition is 00.3.1.3.00. The lingual teeth of 
this species closely resemble those of H. zonata, which I have 
already described; but in H. barbata the two inner laterals are 
glassy and pellucid. The central tooth is broader, and seems to 
be divided longitudinally. The minute slender uncini are pro- 
bably about fifty, becoming almost indistinguishable towards 
the edges of the dental band. 
It is my intention to forward to the British Museum the types 
of the species here described so soon as this communication shall 
have been made public. 
Port of Spain, Trinidad. 
August 2, 1864. 
XXVIII.—On the Asserted Occurrence of Flint Knives under a 
Skull of the extinct Rhinoceros hemitcechus, in an Ossiferous 
Cave in the Peninsula of Gower. By H. Fauconrr, F.R.S., &e, 
To the Editors of the Annals of Natural History. 
GENTLEMEN, 
In the important memoir by MM. Lartet and H. Christy, 
on the Ossiferous Caves of the Périgord, a statement occurs on 
the above head which demands correction by me. After com. 
menting on the proofs of the co-existence of Man with certain 
extinct species, such as Elephas primigenius, Rhinoceros ticho- 
rhinus, &c., M. Lartet adds the following passage :— 
“Cette hypothése de la contemporanéité humaine s’étendrait 
méme a une autre espéce d’éléphant (HL. antiquus, Fale.) dont 
extinction est réputée plus ancienne encore. Les restes de cet 
éléphant ont été recueillis, en France, 4 Saint-Roch, prés Amiens, 
a Clichy, prés Paris, et 4 Viry-Noureuil (Aisne), dans des assises 
diluviennes ou quaternaires renfermant aussi des silex taillés de 
main homme. On n’a pas, que nous sachions, encore observé 
