CONCHOLOGY. 163 



M. pontificalis. The pontifical Mitre. 



Species covered with a yellowish epidermis, beneath which 

 are interrupted fillets of orange coloured spots; spire crowned 

 with tubercles. 



M. micozonias. The small white-banded Mitre. 

 Species sub-ovate, spire very short, generally tubercled. 



M. dactylus. The six-plaited Mitre. 

 Species oval, spire very short, and generally latticed. 



M. tceniata. The riband Mitre. 



Species flaring, turreted, ribbed ; spire more than half the 

 length of the shell ; aperture very narrow, long, subcanali- 

 culated, with one plait. 



3. Voluta. The Volute or Wreath. 44 species. 

 This genus, as established by Linnagus, included shells of 

 diff'erent families, promiscuously blended together, rendering 

 it difficult to determine satisfactorily respecting shells under 

 examination. As arranged and classified by Lamarck, it is 

 still a numerous and beautiful genus, containing some of the 

 most rare and costly shells, particularly V. Junonia or Pea- 

 cock Volute, of which very few are known. They vary 

 considerably in size ; some are very minute, and others large ; 

 they are found chiefly in the seas of the torrid zone or south- 

 ern hemisphere. 



Shell oval, more or less ventricose ; the first whorls of 

 the spire mamillose ; aperture in general much more long 

 than wide, strongly and obliquely notched anteriorly ; the 

 right edge a little reflected, entire ; the columellar edge ex- 

 cavated, and adorned with great plaits, more or less oblique, 

 and a little variable in number with age. 



Voluta nautica. Voluta Neptuni. 



V, diadema. V. cymbium. 



V. armata. V. olla. 



V. ducahs. V. proboscidahs. 



V. tesselata. V. porcina. 



