100 MONODONTA. 



the Index Testaceologicus are anterior to that of Quoy and Gaini., 

 but being unaccompanied by descriptions have not been adopted, 

 Watson's figures of the undoubtedly synonymous T, faliguieus are 

 given on my pi. 19, figs. 1, 2. 



M. LUGUBRis Gmelin. PI. 19, fig. 93 ; pi. 35, figs. 24, 25. 



Shell imperforate, depressed conic, solid, thick, blackish, dotted 

 vipon the ribs with yellow or white ; spire conic, more or less depressed, 

 apex acute ; whorls 5, spirally strongly ridged, the ridges nodulous, 



3 on the penultimate whorl, interstices spirally striate ; last Avhorl 

 depressed, angulate at the periphery, concentrically lirate below, the 

 lirfe coarsely granulose, about 5 in number; aperture very oblique, 

 the outer lip edged with blackish, then nacreous, and lined with 

 opaque white, the thickening slightly notched at the place of the 

 periphery ; columella oblique, nearly straight, flat, opaque white, 

 backed by nacreous. Alt. 9, diam. 13; alt. 13, diam. 15 mill. 



Netu Zealand. 

 Trochus Ixgubris Gmel., Syst. Nat, xiii, p. 3583. — Fischer, Coq. 

 Viv., p. 189, t. G2, f. 1. — T. fingulatus Quoy et Gaim. Votj. de 

 VAstroL, t. 64, f 16-20 (not T. dngulatus ^rocc\\\\\ov Menke). — T. 

 gaimardi Philippi, Conchyl. Cab., p. 211, t. 31, f. 7-9. — Diloma 

 gaimardi Hutton, Manual N. Z. Moll, p. 96. — T. bernardi Recluz, 

 Journ. de Conch., 1852, p. 166, t. 7, f 5. — T. sulcahis Wood, Ind. 

 Ted. snppl., t. 6, f. 40 (not T. sulcatus Martyn nor Lam.). — 21 

 bieanaliculatus Dunker, Philippi, Conchyl Cab., p. 202, t. 30, f. 6. 



A small species, sufficiently distinct from all others in its cari- 

 nated, ridged, granulose whorls. It is more nearly allied to M. strio- 

 lata than to any other species. The sculpture is quite variable. T. 

 bicanaUcnlatus Dunker (pi. 35, fig. 12, 13) seems to be synonymous. 

 It is placed here by Fischer. 



M. LEPROSus Philippi. Pi, 34, figs. 23, 



Shell depressed conoidal, umbilicate, solid, blackish-brown, sculjjt- 

 ured with 4 to 6 granose cinguli ; whorls rapidly increasing, the last 

 rounded; base ornamented with 5 elevated rather smooth cinguli; 

 aperture subcircular inside ; columella with denticles on its lower 

 outer part, above impinging over the umbilical tract. {Phil.) 



The shell is very thick, depressed-conoidal. The 4]-5 whorls 

 widen very rapidly ; the last is rounded. The sculpture consists of 



4 to 6 elevated warty or granose spiral cinguli upon the upper sur- 

 face, and 5 pretty smooth lirre beneath; the interstices are smooth. 



