1875.] MR. G. B. SOWERBY ON NEW SPECIES OF SHELLS. 129 
9. Latirnus aUREO-cincTuS. (Plate XXIV. fig. 2.) 
L. testa elongato-turrita; spira obtuso-acuminata ; basi multo 
contracta ; anfractibus 9, rotundatis, spiraliter liratis, longi- 
tudinaliter costatis, costis latis rotundatis, liris aureo-flavis, 
interstitiis atro-fuscis, filo-striatis, striis albidis ; apertura 
ovata, parva ; columella triplicata; labio externo crenulato ; 
canali brevi, rectiuscula. 
Long. 20, lat. 8; apert. long. 5, lat. 24 mill. 
Hab. Mauritius. 
An elongately turreted shell; spire obtusely acuminated ; base 
much contracted ; whorls 9 in number, rounded, spirally ridged, 
longitudinally ribbed; ribs broad, rounded ; ridges of a golden yel- 
low colour; interstices nearly black, with fine whitish threads; 
aperture ovate, small; columella three-plaited ; outer lip crenulated ; 
canal short, nearly straight. 
Obés. This remarkable little shell I received about two years ago 
from M. de Robillard of Mauritius; but I believe it has never been 
described. There is no known species with which it can well be 
compared. 
10. Myopora rotunpars. (Plate XXIV. fig. 8.) 
M. testa rotundato-subtrigona, valde inequivalvi, albida, utrin- 
que concentrice valide striata; latere postico leviter bian- 
gulato ; margine dorsali excavato, vix incurvato ; umbonibus 
acutis, ceruleo tinctis ; valva dextra valde ventricosa, postice 
bicostata ; valva sinistra planata ; fovea trigona ligamenti 
parviuscula. 
Lat. 25, alt. 23 mill. 
Hab. New Zealand. 
A Myodora of arounded fori, very ineequivalve, both valves con- 
centrically strongly striated, with two slight angles on the posterior 
side ; dorsal margin exeavated, scarcely incurved ; umbones acute, 
of a bluish tint ; right valve very ventricose, with two ribs from the 
umbones to the posterior margin; left valves flat; triagonal liga- 
mentary pit rather small. 
Obs. Four specimens of this species having come into my hands, 
I have compared them with a number of specimens of M. striata, 
and find them to differ in these respects—M. rotundata, right valve 
much deeper, umbones more central, dorsal margin less incurved 
and more sloping, ligamentary pit much smaller, and the whole 
shell rounder. 
EXPLANATION OF PLATE XXIV. 
Fig. 1. Ovulwm depressum, p. 128. Fig. 8 a, 6. Myodora rotundata, 
2. Latirus aureo-cinctus, p. 129. p. 129. 
3. Admete tabulata, p. 128. 9. Mitra induta, p. 128. 
4, Mitra flexilabris, p. 127. 10. Ziziphinus multiliratus, 
5. Conus multilineatus, p. 126. p. 127. 
6. —— gracilis, p. 125. l= , var. B. 
7. Trochus (Polyodonta) mira- 
bilis, p. 126. 
Proc. Zoou. Soc.— 1875, No. LX. ) 
