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labio corrugato-plicato, canali brevi aperto, labro expanso fim- 
briato, intus dentato-plicato. 
Hab. Australia. (Mus. Cuming.) 
The whorls in this species are nodosely plicate in the middle, and 
the surface of the shell throughout is corrugated longitudinally. 
2. Triron (CapesTaNA) aFRicaNnus, A. Adams. T. testa 
ovato-ventricosa, umbilicata, albido-cinerascente, rufo fuscoque 
variegata, anfractibus spiratis, supremis liris tribus elevatis, 
nodulosis, spiralibus cinctis, ultimo sublevigato, cingulis trans- 
versis, subobsoletis ornato, dorso nodoso, latere sinistro longi- 
tudinaliter varicoso, varice nodoso, fusco alboque articulato ; 
apertura ovali, labio levi, labro margine extus varicoso ac 
nodoso-lirato, intus plicato. 
Hab. Ichaboe; South Africa. (Mus. Cuming.) 
A remarkable-looking shell, with the last whorl nearly smooth, 
and the upper whorls with spiral elevated ridges. 
3. TriTon pyrirormis, A. Adams. 7. testa pyriformi, stra- 
minea, albo rufoque variegata, spira brevi, obtusa, anfractibus 
quinque, transversim liratis, in medio serie duplicata tubercu- 
lorum instructis, anfractu ultimo longitudinaliter subplicato ; 
apertura ovata, labio transversim corrugato, canali mediocri, 
recurvo, aperto, labro extus varicoso, intus plicato-lirato. 
Hab. China. (Mus. Cuming.) 
This species is pyriform, with a double row of compressed tuber- 
cles in the middle of each whorl. There are no regular varices, and 
the canal is recurved. 
4. Trrron cometus, A. Adams. T'. testa fusiformi, sordide 
carnea, varicibus albo rufoque variegatis ; spira elevata, an- 
fractibus rotundatis, transversim crebre liratis, valde nodoso- 
plicatis, varice unico instructis; anfractu ultimo nodulis duobus 
elevatis ad dorsum ornato; apertura ovata, labio transversim 
corrugato, canali longo, tenui, recurvo, labro extus varicoso, 
intus dentato-lirato. 
Hab. China. (Mus. Cuming.) 
This species is of a dirty flesh-colour, with the varices variegated 
with white and fuscous; the canal is slender, and recurved, and 
there are two elevated nodules on the back of the last whorl. 
5. Triron osscurus, A. Adams. T. testa fusiformi, fusca, 
nigro-fusco variegata, epidermide pilosa obtecta; spira acumi- 
nata, anfractibus transversim liratis ac longitudinaliter plicatis, 
varice unico instructis ; apertura ovata, labio intus valde trans- 
versim plicata, labro extus varicoso, intus dentato-plicato. 
Hab. South coast of Africa. (Mus. Cuming.) 
This is an ovately fusiform species, covered with a brown pilose 
epidermis, with a single varix on each whorl, and with both lips of 
the aperture corrugately plicated, the plaits in the inside of the 
outer lip being almost dentiform. 
