54 
REPORT OF COMMISSIONERS OF INLAND FISHERIES. 
therefore that before one can predict the adaptability of any loeal- 
ity to clam or oyster culture, some knowledge of the amount of 
diatomaceous food present is quite essential. 
The Commission is 
under obligations to Messrs. Henry Lothrop and Norman N. 
Mason ‘for the following carefuly prepared list of diatoms from 
skimmings made at Wickford during July, 1899. 
RAPHIDIE. 
FAMILY 1. 
Amphora commutata. 
Ss excisa. 
formosa. 
s incurva. 
os laevissima. 
ie lanceolata. 
es lineata. 
FAMILY 2. 
Mastogloia apiculata. 
‘é exigua. 
Stauroneis acuta. 
Navie 
se 
apiculata. 
oblonga. 
Pheenicenteron. 
producta, 
pulchella. 
salina, 
ula abrupta. 
ambigua. 
Americana, 
anceps. 
apis. 
Bombus. 
borealis. 
cardinalis. 
columnaris. 
cryptocephala. 
CYMBELLE. 
Amphora maxima. 
< minutissima. 
os obtusa. 
oe oyalis. 
* recta. 
eS veneta. 
Cymbella lanceolata. 
NAVICULE. 
Navicula didyma. 
diffluens. 
elegans. 
elliptica. 
forcipata. 
gibba. 
gracialis. 
granulata. 
humerosa. 
impressa. 
lanceolata; var. curta. 
latissima. 
Liburnieca. 
longa. 
lyra. 
macra, 
maculata. 
marina, 
Menisculus; var. peregrina. 
