12 Melvill, Molluscan Fauna of the Arabian Sea, etc. 



costis mcrassatiSy perlcBvibus, pallide stramineis, interstitiis 

 IcBvissintis, rubrotinctis, ultimo anfractu apud basim paullum 

 truncato, ad medium longitudinaliter, sicut supra, costato, 

 infra ad basim Icevisimo, albescente, apertura ovata, labro 

 incrassato, sinu suturali firofimdo, excavato, dorsaliter leniter 

 bifasciato, margine columellari recto. 



Long. 19 mm., lat. 5. 



Hab. On the Oceanic cable, near the entrance to the 

 Persian Gulf. 



A very shining, smooth, brightly-coloured Drillia, with 

 about ten whorls, the apical mammillate, vitreous, the rest 

 shining, ornamented with pale straw-coloured thickened 

 ribs on a smooth blood-red ground, the last whorl smooth 

 below the middle to the base, where it is almost white. 

 Above, the ribs are as in the upper whorls, the mouth is 

 oval, outer lip somewhat thickened, sutural sinus profound, 

 excavate, dorsally the outer lip is slightly bifasciate, the 

 columellar margin is straight. 



A few specimens, all alike, save as to size. 



Cythara hypercalles, sp. nov. 



(PI. I, f. 5.) 



C. testa eleganter fusiformi, versus apicem attenuata, 

 gradattda, solidiuscula, anfractibus, inclusis duobus apicali- 

 bus,vitreis, decem, longittcdinaliter cos tatis, costis inceqiialibus, 

 transversim spiraliter undique arctissime striatis, stramineo- 

 ochraceis, dorsaliter et prcecipue circa suturas brunneo-suffusis 

 velmaculatis, ultimo anfractu apud basim paullulum recurvo, 

 apertura angusta, oblong a, labro extus incrassato, albo, 

 dorsaliter binis maculis brimneo-rufis decorato, intus simidac 

 margine columellari, minute denticulato. 



Long. spec. max. 15, lat. 5 mm. 



Hub. Muscat in 20 fathoms ; sandy mud. 



Six examples, but only three mature, of an elegantly 

 formed Cythara, fusiform, gradate, ten-whorled, two being 



