1877.] MR. SMITH ON NEW SOUTH-AMERICAN HELICID. 361 
Fig. 3. Outer side view of alveolar part of the left maxillary, with the molar 
* series after the acquisition of the premolar in situ. 
Puate XXXVITI. 
Sthenurus minor, Ow. 
Fig. 1. Right upper premolar, outer side of crown. 
. The same tooth, the inner side of crown. 
. The same tooth, working surface of crown. 
. Right upper m 3, working surface of crown. 
He Cobo 
Sthenurus atlas, Ow, 
. Right upper premolar and contiguous molar, outer side of crown. 
The same teeth, inner side of crown. 
. The same teeth, working surface of crown. 
. Right upper, 7 3, working surface of crown. 
Right lower premolar, outer surface of crown. 
. The same tooth with d 4, inner surface of crown. 
. Right upper incisors, outer side view. 
aad 
ek ane ks Bordon 
Sthenurus brehus, Ow. 
t Right upper premolar and contiguous molar, outer side of crown. 
. The same teeth, inner side of crown. 
. The same teeth, working surface of crown, 
. The right upper m 3, working surface of crown. 
. The right lower premolar, outer side of crown. 
. The same tooth, inner side of crown. 
be et 
He Cobo 
awa 
“ISO 
All the figures in both Plates are of the natural size. 
6. Description of new Species of South-American Helicidee 
in the British Museum. By Epear A. Smrru, F.Z.8. 
[Received April 10, 1877.] 
(Plate XXXIX.) 
Wewix (IsomertA) GEALEI. (Plate XXXIX. figs. 9 a, 9 6.) 
Testa obtecte perforata, depresse conica, ad peripheriam acute 
carinata, oblique striata et granulata, supra anfr. ultimum 
malleata, castanea, versus apicem pallidior ; spira depresse 
conica, apice obtuso, marginibusque vix convewxiusculis ; an- 
fractus 5 parum conveat, lente accrescentes, sutura profundi- 
uscula sejuncti, ultimus aliquanto pone labrum contractus, ad 
aperturam subito deflexus, constrictus, subtus ad labrum quasi 
distortus, circa medium acute carinatus, versus aperturam carina 
plus minusve evanescente ; apertura subhorizontalis, intus pallide 
- carnea ; peristoma incrassatum undique eneo-viridi tridescens 
margine dextro sinuato reflexo dentem prominentem fuscum 
gerente, columellari lato refleco umbilicum tegente, medio intra 
aperturam dente pallido minore munilo, superne callo tenui 
prismatico labro juncto. 
Diam. max. 37 mill., min. 30; alt. 17. 
Hab. Malaeatos, South Keuador. 
I feel much pleasure in associating with this remarkable species 
