170 



splra acuminata, anfr. 9-10 convexiusculis, supernis longitror- 

 sum tenuiter plicatis, ultimo leevi, contracto, cseteris nonconformi, 

 •| long, testse adequante ; sutura profunda ; apertura angusta, 

 lunata; labro arcuate acuto, intus sulcato ; columella transversim 

 plicata, callosa ; sinu siphonali angusto, producto. Long. ^ ; 

 lat. i poll. Hah. Pacific ? 



Closely allied to C. avara, Say, in form, size, and ground 

 color, but readily distinguished by its distorted form, the encir- 

 cling chestnut lines, and the want of revolving strise between the 

 folds. 



CoLUMBELLA CASTANEA. T. parva, sollda, elongata, ovata, 

 Isevis, castanea vel fascia angusta albida cincta : spira ovato- 

 conica, anfr. 7 convexis, ultimo ovali f long, testse superante, ad 

 basim spiraliter striate : apertura ampla, alba ; labro recto, pes- 

 tice emarginate, rufe-tincte, intus sub-plicato; columella antice 

 plicata; sinu siphonali ample. Long. ^; lat. f poll. Hab. 

 Rio Janeiro. 



Compared with C. unicolor it is smaller, the aperture is less 

 rotund, and it has a pale cincture. 



CoLUMBELLA GAUSAPATA. T. parva, solidula, elongata, ovato- 

 conica, ad basim spiraliter striata, sub epidermide rudi subrufo 

 concinne rufe-reticulata vel variemede maculata aut fasciata : 

 spira cenico-turrita, anfr. 6-7 convexiusculis, ultimo § long, 

 testee, antice subito in rostrum brevem angustate ; sutura valde 

 impressa : apertura angusta lunata ; labro simplici, rufo, intus 

 sparse denticulate. Long. ^ ; lat. | poll. Hob. Puget Sound. 



An inelegant, very simple species allied to the preceding ; but 

 it is less ventricose, the aperture paler and narrower, which with 

 its tough, wooly epidermis sufficiently characterize it. Beneath 

 the epidermis it is polished and finely reticulated, blotched or 

 banded. 



MiTRA viTELLiNA. T. lauceolata, selida, dilute aurantia ma- 

 culis albis fasciata, sulcls linearibus ad 15 lyrata et striis tenuibus 

 crebris cincta ; intersectionibus punctatis : spira elevata, anfr. 

 8-9 planis, ultimo f long, testae, cylindracee, antice angustate: 

 apertura angusta ; labro recto, simplici ; columella 4-plicata, sinu 

 siphonali brevi, vix recurve. Long. 1 J ; lat. ^V po^^- -HaZ>. — ? 



MiTRA FiDicuLA. T. lanceolato-fusiformis, livido-crocea, fas« 



