FAMILY 8. CANALIFERA. 197 
tura suborbiculari, labro incrassato, valdé crenato, superné plus mi- 
nusve canaliculato. 
It was the same judicious policy which Lamarck exercised in the crea- 
tion of new genera, that often tempted him to abandon many that had 
been introduced without occasion. De Montford proposed no less than 
four genera, Triton, Aquillus, Lotorium and Persona for the reception of 
those mollusks which we now associate under the first of the foregoing 
titles, in imitation of our great predecessor; the Triton cutaceus was 
selected as a type for the second of those genera, the Triton lotoriwm for 
the third, and the Triton anus for the fourth. The Tritones have all solid, 
well-developed shells, not distinguished by any regularity of form, for 
they present a greater diversity in that respect than almost any of the 
Canalifera, but by a peculiarity in the distribution of the varices, which 
are only deposited at long intervals. In some species the varices are 
altogether wanting, but there is always an association of character at- 
tached to the Tritones by which they may be readily identified. 
The shell of Triton may be described as being somewhat oblong, in 
some cases of very large size, and occasionally covered with a strong 
hairy epidermis ; the spire is prominent, with the whorls generally orna- 
mented with a few remote varices, and the columella is either rough or 
smooth, ending in a rather recurved canal, which is sometimes short, 
sometimes rather long; the aperture is nearly orbicular, and the lip, 
which is thickened and crenated, is always more or less canaliculated at 
the upper part. 
Examples. 
Pl. CCXLUIL. Fig. 1. 
Triton austrauis, Lamarck, Anim. sans vert., vol. vil. p. 179. 
Murex tritonium australe, Chemnitz, Conch., vol. xi. pl. 194. f. 1867 and 
1868. 
Pl. CCXLII. Fig. 2. 
Triron cLanpestinus, Lamarck, Anim. sans vert., vol. vil. p. 188. En- 
cyclopédie Méthodique, pl. 433. f. 1. 
Murez clandestinus, Chemnitz. 
