78 Monograph on the Cyprceidece, by Mr. Gray. 



Inhabits the Indian Ocean, Madagascar, Lister. Amboyna, 

 Rumphius. Sunda, Lister, Linneus. Friendly Islands, Martyn. 

 Mus. Brit. Sowerby, Noslr. 



Shell ovate, elliptical, white ornamented with brown lines, 

 leaving white, more or less angular or orbicular spots, or forming 

 brown reticulations, the dorsal line simple, mostly central, with 

 a brown lunate spot at the side of the spire, edge thickened, 

 roundish angular, white, yellowish, or purplish spotted with 

 black, base flattish, flesh coloured or white, aperture linear, 

 slightly concave, dilated in front, teeth nearly similar, close, 

 rather narrow, brown, columella deep, flattish, plaited ; spire 

 conical, convex ; inside purplish. — axis 3, diameter 2 inches. 



This species varies exceedingly. 1. in sizp, the following are the 

 measurements of 3 specimens ; a. axis 1 ■§ , diameter f ; b. axis 1 T 4 S , 

 diameter 1 T ^; c. axis 3, diameter 2 inches ; 2. in shape, being 

 more less margined ; and 3. in colour, the lines being some- 

 times narrow or broad, more or less confluent, they are some- 

 times so much so in the last variety, that the back of the shell 

 appears brown with white spots as in C. cribraria, sometimes 

 obscurely banded. 



Cyprceu Arabicula. 



Testaovata gibbosa, albido-casrulescens obscure quinque-fasciata, 

 lineolis fulvis ornata ; basi fulvescente, planulata lateribus, in- 

 crassatis, angulatis, carneis, atro-rubro-maculatis; apertura con- 

 cava dentibus albidis, eminentibus. 



C j praea arabicula. Lamarck Ann. Mus. xvi. Hist. vii. 399. 



Cypraea arabica. Far. Dillwyn, R. S. 438. 



2. Incompleta. Testa ccerulescens 3-fasciata, basi fulvi. 



Western coast of Mexico, near Acapulco. Humboldt, Lamarck. 

 Mus. Nost. 



Shell ovate, gibbous, whitish blue, obscurely three banded, 

 ornamented with fulvous brown irregular lines, base flattened, 

 edge and inner side of the aperture concave, pale reddish yellow, 

 margin thickened, angular, with largish black purple spots, ex- 

 tremities above brown, slightly produced. Aperture rather broad, 

 teeth narrow, deep, whitish; columdl ., Lase concave, deep, centre 

 smoothish, innermost part plaited, spire visible, conical convex, 

 axis 1 inch, diameter A of an inch. 



