149 



PHASIANELLA, Lamarck. 



(Plates I., ir. Thes. 475, 476.) 



Testa ovato-pyriformis spiralis laevis, coloribus variegatis 

 picta ; spira coaica acuminata ; ultimo anfractu magno ; 

 apertura subovata, labio columellari arcuato, ad suturam 

 calloso, labio externo simplici acuto. Operculum pauci- 

 spirale semiovatum vel rotundum, extus callosum. — Rather 

 oval in the body, with a spire rising into a modified pyramid ; 

 smooth and beautifidly variegated with bands, spots, and 

 flashes. Operculum calcareous and rounded or oval. 



Species. 



1. AUSTRALis, f. 2-6, Gmelin. — Oblongo-pyramidata polita 

 fasciis lineis maculis strigisque pictis; operculo semiovato. 

 — The cross-bands and fluctuating stripes of the typical 

 variety, f. 3, are very rich and beautiful, as are the lines and 

 stripes and arrow-headed spots of other varieties. With 

 such variations, it is impossible to admit the distinctiveness of 

 Reeve's P. venusta (f. 6), the only differences being that 

 the downward streaks of colour are cut through by white 

 lines, and that the shell is thinner and more pyramidal. These 

 characters are, however, interchangeable. 



2. ZEBRA, f. 9, Gray, MS. — Ovata, crassiuscula, obtusa, 

 strigis latissimis fuscis usque ad apicem oblique picta ; 

 anfractibus sex convexis. — The broad longitudinal bands are 

 remarkable. The shell is thicker than F. australiSy and 

 more obtuse. 



.3. LENTiGiNOSA, f. 20a, RecvB. — Elevata acuminata cinerea, 

 fusco nigrescenti alboque seriatim punctata; anfractibus 



M li 



