102 ' MONODONTA. 



part with three to six spiral keels; axis imperforated; throat 

 smooth and silvery. {J. E. Gray.) 



E. Coast New Zealand. 



M. subrostrata Gray, in Yate's Account of New Zealand, etc., 

 (1835).— Smith, Voy. Erebus and Terror, Moil., p. 4, t. 1, f. 14.— 

 HuTTON, Manual N. Z. Moll., p. 96; Trans. N. Z. Inst., xv, t. 15, f. 

 G.; Proc. Linn. Soc. N. S. Wales, 1884, p. 367. 



The figures are from Smith. I have not seen this species. Hut- 

 ton's description of it is as follows : Shell with subnodulose spiral 

 ribs which are distant on the upper surface and closer on the base ; 

 yellowish, with undulating longitudinal purple lines ; mouth yellow, 

 more or less marked with purple. 



M. MORio Troschel. PI. 35, figs. 26, 27. 



Shell semiglobose, imperforate, thin, obsol'etely transversely sulcate, 

 black, with irregularly scattered white dots ; aperture subtetragonal ; 

 columella very oblique, nodulous, continued in a porcellanous band 

 parallel to the lip ; lip acute, within blackish-green. Nearly allied 

 to T. pethiops, but more depressed, with more numerous, less dis- 

 tinct transverse stripe, often wanting above ; the white dots ir- 

 regularly scattered upon the greenish-black ground. 

 Oblique alt. 10, diam. 14 mill. (Phillppi.) 



Habit(d unknown. 

 T. morio Troschel in Philippi, Conchyl. Cab., p. 142, t. 24, f. 

 3. 



Known to me only by Philippi's description and figures. It is 

 probably the same as Watson's T. porcifer, and if so has i)riority. 



M. PORCiFERA Watson. PL 22, figs. 53, 54. 



Shell depressed globose, imperforate, spirally superficially lirate, 

 black, very sparcely dotted with white ; spire short and much de- 

 pressed, or slightly elevated ; apex acute ; suture linear, margined 

 below ; whorls about 5, very rapidly widening, the last very large, 

 depressed, the base with a small eroded patch in front of the aper- 

 ture ; aperture very large, very oblique, the outer lip not thickened 

 within, margined Avith black, nacreous and iridescent, smooth, but 

 showing very distinct entering folds in the texture of the nacre, 

 corresponding to the lir?e of the outer surface ; columella oblique, 

 sub-straightened, but not really dentate, quite broad and flat or 

 subconcave, composed of white, opacpie substance, expanded above 

 upon the parietal wall but not extending to the superior lip, nor 



