376 Mr. Swuinson on several rare and iindcscribcd HhclL^. 



containing rare or unique species, which are sekloni if ever 

 seen again, but after a lapse of years ; they are either pur- 

 chased to enrich foreign cabinets, or pass into the hands of 

 other collectors remote from the metropolis, and become of 

 difficult access to a scientific writer. It is therefore of much 

 importance to the science, that such subjects should be re- 

 corded at the time ; for, by so doing, extensive materials are 

 accumulated to facilitate the labour of any future writer, who 

 may undertake a general systematic work descriptive of all 

 the species. 



Impressed with a conviction of the value of such records, 

 however short, or however unconnected with each other, I 

 have drawn up the following specific characters of shells 

 which appear to me not hitherto described. These notices 

 I intend occasionally to continue, in the same way, by de- 

 scribing such other new shells as may come imder n:y ob- 

 servation. The genera, unless otherwise expressed, are those 

 of MM. Cuvier and Lamarck; and I have subjoined an En- 

 glish version to the Latin characters, that the whole may be 

 more generally useful. 



1. Cypr/EA purjmrasccns^ 



C. testa ovata, dorso jHUictis fuscis, nebulosis, obsito ; lateribus 

 purpurascentibus, livide guttatis; ventre depresso. 



Shell ovate, the back clouded, and spotted with brown ; the 

 sides purplish with dark livid spots; belly depressed. 



Hab. Mus. Mawe. et nostro. 



2. Cypr.^a pidcheUa. (Exotic Conch, ined.) 



C. testa ovata, ventricosa; doi'so punctis fuscis, nebulosis, 



obsito ; lateribus flavescentibus fusco guttatis ; ventre striato, 



striis levatis, spadiceis. 

 Shell ovate, ventricose ; the back clouded with brown dots ; 



sides yellowish with brown spots ; belly with rufous elevated 



striae. 

 Hab. Sina, rarissima. Mus. Dubois. 



3. CYriLT:.\ spadicca. 



C. testa ovata, oblonga, immaculata; dorso rufo; ventre albo; 



lateribus lividis. 

 Shell ovate-oblong, unspotted ; the back reddish chesnut; belly 



white; sides livid. 

 Hab. Oc. Pacif. rar. Mus. Dubois. 



.4. Ampullauia carinata. 

 A. testa lasvi, globosa ; anfractibus juxta suturam carinatis ; 



spira brevi ; apertura marginata ; operculo testaceo. 

 Shell smooth, globose; the whorls carinated near the suture; 



spire short ; aperture marginated ; operculum shelly. 

 Hab. Mus, nostro. 5. Ampul- 



