MOLLUSCA 193 



Fulgur perversa Linne (Left-Handed Conch) 



{Busy con perversion Linne) 



PLATE XIX. Fig. 2 



Similar to the above species except that it is 

 sinistral or "left-handed." In other words the 

 opening is on the left instead of the right as in 

 caricci and canaliculata. For this reason most people 

 call it the "left-handed conch." However, accord- 

 ing to some, this is a "right-handed" shell, whereas 

 the other two species are "left-handed," because 

 perversa is held in the right hand when used as a 

 drinking cup and the other species are held in the 

 left hand. This double meaning of the popular name 

 has caused some rather amusing incidents among 

 collectors. 



F. perversa is not known alive to-day north of 

 Cape Hatteras. Nevertheless worn shells are oc- 

 casionally found on the beaches as far north as New 

 Jersey and occasionally southern New England. It 

 is believed that these are fossil shells and that they 

 were washed from some deposit of Pleistocene age. 

 This species apparently lived in New Jersey waters 

 during interglacial time, when the climate was some- 

 what milder than that of the p^ it. 



Marginella guttata Dillwyn 



PLATE XIX. Fig. 7 



An attractive southern shell that has only re- 

 cently been found in New Jersey waters; about an 

 inch long and usually pink in color. 



