MANAGING EDI ITORS: 
Profs, E. D. COPE, Paoi, AND J. S. KINGSLEY, Boston. 
‘ SSOCIATE EDIT M st 
Dr, C. f BESSEY, Lin 
AYLEY, ME Main ne, 
ho. zN LOCKINGTON, Rugby, England. 
Dn. C. O. WHITMAN, Chicag 
M 
— Pror. C. M.;WEED, Wide. "N. H:, isi W.S.B 
AMERI 
NATURALIST 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
abe IN THEIR WIDEST SENSE. 
THOMAS ghee Washington, 
Pror. E. A. DREWS, B 
AUGUST, 1893. 
CONTENTS. 
PAGE. 
THE SPoRE-FORMING SPECIES OF THE GENUS SAC- 
| CHAROMYCES. < . . J- Christian Bay. 685 
NOTEs ON THE MARINE BIOLOGICAL LABORATORIES 
.OF Europe.  (Illustrated.) Bashford Dean. 697 
TAIN SHELL HEAPS OF THE ST. JOHN’S RIVER, 
FLORIDA, HITHERTO UNEXPLORED. (Hlus- 
trated.) Satie "Sa aes Clarence B, Moore. 
708 
ENT LITERATURE.— Hawks He Owls « of the 
BOOKS AND PAMPHLETS. | T24 
l tion to Insect Embryology - ks 
North. America during Cambrian Time— 
Silurian’ Brachiopoda of Mi nnesots- 
News. General—Paleozoic—Mesozoic- 
Botany—The Coming Botanical - i 
dison— Freshwater Alga. a 
. s 
- Zoology. —Loology of the Lower | 
Enbryolegy — The Sea-urchin uA 
grees re Work af fiie: 
