Zoology. 243 
in 
of recent Foraminifera, though in very variable proportions, 
ey are generally most abundant in the sands of warmer lati- 
tudes, and especially on shores profusely furnished with sea- 
weed . 
g. 
“Plancus,* who, according to D’Orbigny, was the first to 
describe and figure the shells of Foraminifera, counted 6000 indi- 
viduals in an ounce of sand from the Adriatic. D’Orbigny esti- 
mated that there were 160,000 in a gram of selected sand from 
the Antilles. Schultze gives 1,500,000 as the number he found 
in fifteen grams of sand from Gaeta on the coast of Sicily. 
_ “Even on the comparatively barren shores of New Jersey, con- 
sisting of quartz sand, foraminiferous shells occur in notable 
In a portion scraped from the surface between tides, 
at Atlantic City, I estimated that there were 18,700 shells to the 
ounce avoirdupois, all of a single species of Nonionina. In 
another sample, from Cape May, I obtained 38,400 shells to the 
ounce, likewise of the one species. 
“In sand collected by scraping up the long white lines on the 
bathing beach at Newport, Rhode Island, occupying an indenture 
were found to be much more numerous, but, excepting in the case 
oF some examples of Miliola, of smaller size. In an ounce of the 
sand, I estimated that there were about 280,000 shells, of several 
genera and species.” ‘ 
One of the most remarkable forms described in the book is the 
inameeba mirabilis, from the Cedar swamps of New Jersey, rep- 
resented by many figures on plates 6 and 7. It is ——- 
cream-white or greenish-white in color, but spotted often wit 
green, brown, and yellow, all the colors, excepting the white, being 
due to the food-balls, which are chiefly the Desmids, Didymoprium 
and Bambusi is a gluttonous feeder, and is commonly so 
Nig with this vegetable food as to be more or less opaque. 
* Ariminensis de conchis minus notis. Venice, 1739, 
