NERITINA VIRGINEA VARIETY MINOR} 



While collecting one sunimcr in Jamaica. ' 

 visited the " Salt Pond'" near Tort Ilcnclcrsoi 

 pond is separated from the ocean by a narn>\v s 



to the ocean and no fresh water st n ll w 1 

 thus comes to be considerably more salt than 



examined had a specific <;Tavity of 1.03S. 



The fauna of this pond is quite rich and in( 

 interesting forms. One is esi)ecially attracted 

 little Neritina which literally covers the beach I 

 water's edge. From a double handful of these 

 up in one spot on a little sand bar near the ; 

 has selected the shells in the accomi)anying 

 arranged for use in another publication and are ( 

 a remarkable example of diversity. I would 

 attention not only to the diversity but also to 

 these shells and its apparent cause. 



Ncritiiia virginca is a widely distributed litt 

 cies. Full grown adults from the ocean are o 

 figures on the accompanying plate. The\ sho\ 

 of color and color pattern. Other types also 

 both the open ocean shells and those from the 

 have not attempted to figure them. 



It is interesting to find that the Neritina of ' 

 is a dwarf variety. In almost ever) regard e\ 

 mals resemble their ocean relatives, but their : 

 The diameter of an average sized shell fron 



for this article the accompanying plate which he has prepar 



