PERSH'ULA. 39 



M. PULCHERRIMA, Gaskoin. PI. 11, fig. 30. 



Shell light yellowish, usually with darker bands and four 

 revolving rows of brown and milk-white spots. 



Length, -15--25 inch. 



West Indies (Gaskoin); Bahamas (Redfield). 



Has the form of M. catenata, and has frequently been con- 

 founded with it. May be distinguished by the faint bands and 

 fewer series of revolving spots. 



M. SAG1TTATA, Hillds. PI. 11, fig. 31. 



Yellowish white, with light chestnut sagittate revolving series, 

 and interrupted lighter, longitudinal zig-zag markings. 



Length, -25-'35 inch. 



Caribbean; BaJiamas to Brazil ; Australia. 



Has the form of M. catenata and nearly the markings of M. 

 phrygia. I have before me specimens collected by J. Brazier 

 in King George's Sound, S. W. Australia, which do not differ 

 from the normal West Indian form of the species. 



M. CHRYSOMELTNA, Redfield. PI. 11, fig. 32. 



Yellowish white, with regularly spaced subquadrangular brown 

 spots in revolving series. Length, '3 inch. 



West Indies. 

 M. PACIFICA, Pease. PI. 11, fig. 33. 



Whitish, with four or five rows of arrow-head brown markings. 

 Length, 5 mill. 



Paumotus Is. 



Smaller and more cylindrical than M. sagittata, Hinds ; the 

 arrow-heads point to the left. 



M. DUBIOSA, Ball. PI. 11, fig. 34. 



Yellowish brown, with uncertain fluctuating white bars, spots 

 and streaks, irregularly disposed, with a general tendency to 

 elongation in the direction of the lines of growth ; callus above 

 the spire marked with a circle of radiating brown dots, with an 

 obscure white band outside of them ; a dark brown patch on 

 the outer edge of the outer lip. Length, a 3 inch. 



Acapulco, Mexico. 



Described from a single, evidently beach-worn specimen, and 

 must be considered a doubtful species. 



