On a Species of Acetes from Japan. 



BY 



Kamakichi Kishinouye, 



Imperial Fisheries Bureau, Tokyo. 



The shrimp native to the western parts of Japan and vulgarly known 

 under the name of" aki-ami,"* belongs to a new or little known species of 

 the genus Aedes. On examining this species, I have found a peculiar 

 point in the structure of the flagella of the second antennae, which struc- 

 ture, so far as I know, has never before been described by naturalists. 



The body is laterally compressed, naked and nearly smooth. The 

 carapace is about two-sevenths of the total length of the animal. The 

 rostrum is very short, and is armed with two dorsal teeth, of which the ante- 

 rior is much smaller than the posterior. Supraocular and hepatic 

 teeth are present. Both are sharply pointed, the former being a short 



*" Aki " means autumn and '" ami, 7 ' small shrimp. 



