208 



characters between Strombua and Pterocera. In detail of pattem 

 and sculpture it resembles S. laciniatus, but there is a large centrai 

 obliąue tubercle on the back, and the tip is thickened into two very 

 large obtuse oblong tubercles, the upper part being produced into 

 two decided Pterocera claws, one of which is prolonged in a curved 

 manner to the extent of an inch and a half. The specimen has 

 rather the appearance of being malformed ; but notwithstanding this 

 seeming irregularity of growth, there is no doubt whatever of its 

 being specifically distinct from any hitherto described form. 



2. Cypr^aBarclayi(P1. XXXVIII. fig. 4). Cypr. testą pyri- 

 formi-ovata, subumbilicata ; dorso elevatiusculo, extremitatibus 



eleganter calloso-productis, subrostratis ; basi conveia ; denti- 

 bus utrinųue octodecim ad novemdecim fortibus tumidiusculis ; 

 interstitiis conspicue sulcatis, profundis ; dentibus exterioribus 

 super labrum decurrentibus, medianis bijidis ; nitente, alba, 

 dorso aurantio-spadiceo undiąue eximie punctato et lentiginoso, 

 extremitatibus aurantio-spadiceo tinctis. 

 Long. I poli., lat. f poli. 



Hab. Island of Diego Garcia, a dependency of Mauritius (taken 

 on a block of coral dredged up from deep water) , 



An exquisitely delicate species in the finest possible condition, 

 perfectly unlike any of this favourite genus hitherto known. It is 

 of an elegantly pyriform shape, with the extremities rather produced ; 

 the teeth on each side the aperture being especially characteristic, 

 from their strong development and deeply grooved interstices. The 

 painting is a delicate profusion of orange-buff dots of difFerent degrees 

 of tone upon a shining pearl-white ground ; the extremities and 

 teeth, the outer of which extend nearly across the base, being tinged 

 ■vvith the orange-buff in a darker and brighter hue. 



3. Pyrula(Rhizochilus) De Burghi^ (PI. XXXVIII. fig. 3). 

 Pyr. testą pyriformi-ovata, subanguste umbilicata ; spira bre- 

 viuscula, turrita ; anfractibus superne late angvlato-eipajisis, 

 ad angulum sąuamis subamplis plano-cotnpressis flabellatim 

 coronatis, infra basin versus attenuatis, undigue dense lirutis, 

 liris subtilissime serratis ; alba, aperturcB fauce sukata. 



Long. 1| poli., lat. 1-^ poli. 



Hab. China. 



A beautifully turbinated pagoda-like shell, being coronated through- 

 out the expanded angle of the whorls with large compressed fan- 

 shaped scales. It is of the šame peculiar typical form as the Pyrula 

 Maivce, the umbilicus being, however, much more contracted, and is 

 believed to be an inhabitant of the šame locality. 



I have the pleasure of naming this very delicate and remarkable 

 species in honour of Mrs. De Burgh, a lady, whose warm assiduity 

 and zeal in collecting shells is equalled by her intelligent apprehen- 

 sion of their characters and correct cstimatiou of their comparative 

 rarity and bcauty. 



