404 HABITS OF CRUSTACEANS. 



water. It swims in the manner of a Oranpon, by rapid 

 inflections of the abdomen. It will occasionally spring 

 through the water with the greatest velocity, in a back- 

 ward direction, and when caught wounds the hands with 

 the tail, which it throws about with violent jerks. 



Among numbers of new and interesting genera of 

 Crustaceous animals found by us in the province of 

 Unsang, Borneo, was a new species of Alope (White), a 

 remarkable shrimp-like animal, with one foot-claw rudi- 

 mental, and the other enormously developed. It is an 

 active and restless little creature, darting and whirling 

 forwards and backwards, and frequently producing a 

 loud clicking noise by snapping the pincer at the end of 

 the large foot-claw, in the manner of the Callianassa and 

 Squilla. Specimens may be found under nearly every 

 stone which is turned on the beach at low-water mark, 

 and the loud noise it makes, when discovered, would 

 astonish persons ignorant of the cause of its production. 



The Gonodactyli appear to differ from Squilla in their 

 habits, inasmuch as they are generally found in deeper 

 water, whereas the Squilla affect the shallow, weedy, and 

 sandy bottoms, within coral reefs, and on flat beaches, 

 where they hide in holes of the banks of pools, across 

 which they dart occasionally in straight lines, leaving a 

 turbid track behind them. They both, however, have 

 the same power of producing a loud clicking noise with 

 their chelae, and of inflicting very severe wounds with 

 those organs, using them in a scythe-like manner, like 

 the Mantis. 



The Cryptopodia dorsalis (Adams and White) is found 

 on a stony bottom, in deep water. It has the habits of 



