GASTEROPODA. 237 
This shell has the form, size, and armature of Murex noduliferus, 
Sowerby, which is, however, described as being “elevately trans- 
versely striated,’ and with a very short canal. 
Figures 287, 287 a, dorsal and ventral view of the shell. 
Monoceros imBRicatum (Lamarck), Anim. sans Vert., x. 118. 
Encyc. Meth., pl. 396, f.1,a,b. Reeve; Conch. Icon., f.10. Bucconum 
calcar, Martyns; Univ. Conch., pl. 50. Monoceros breve, SowERBY ; 
Genera, f. 2. 
Anima dirty ochreous yellow throughout; foot semi-elliptical, 
rounded behind, not dilated at anterior angles, and ordinarily ad- 
vancing beyond the mouth; head with a short neck, bifurcating into 
two stout subulate tentacles, with the eyes near their tips; mantle 
folded around the tooth so as to appear perforated; siphon slightly 
protruded. 
Obtained at Orange Harbour, in crevices of rocks at half-tide. The 
short variety, named M. breve by Sowerby, is merely the shorter 
formed female of Lamarck’s M. imbricatum.  [1. P. c.] 
Figure 288, shell, with the animal as in motion; 2884, the under 
surface of the foot. 
TURBINELLA CORNIGERA (Lamarck), Anim. sans Vert., ix. 380. 
Quoy and Gaimarp; Voy. de] Astrol., pl. 35, figs. 24-26. Kener ; 
Iconog., pl. 1; &e. 
Anima pale, mottled above with violet; locomotive disk salmon- 
coloured, more yellowish anteriorly, as are also the mantle and tenta- 
cles; head concealed, the foot advancing before it: tentacles very long 
and divergent, with the eyes on a bulbous expansion near their tips. 
Operculum chestnut-coloured. 
The figure in the Voyage of the Astrolabe, represents the animal as 
deep green, and the foot as ash-coloured. ‘he shell is borne aloft by 
the animal, when moving, in a very peculiar manner. 
60 
