HABITS OF CRUSTACEANS. 497 



obtained. This genus has precisely the same habits as 

 Lambrus, Cryptopodia, and others, simulating death when 

 alarmed, and retracting its members under the carapace. 

 A new genus the Ceratocarcinus (Adams and White) was 

 obtained off Balambangan in twelve fathoms of water, 

 having the same helpless appearance and inactivity of 

 habits, as Parthenope and Lambrus. The species (C. 

 longimanm, A. and W.) is of a blood-red colour with five 

 light bands across the carapace. The Cosmonotus (Adams 

 and White), another new genus, was obtained near Unsang, 

 on the east coast among the clear sandy pools within the 

 reef-barrier. It has the same habits as Hippa and 

 Remipes. The species (C. Grayii, A. and W.) is of a 

 brick-dust red colour and scarlet, minutely speckled, 

 with white legs and chelae. The Notopm dorsipes has 

 the same habits, and the Albunea, like the Hippa, seems 

 also to prefer the still water just within coral reefs, or the 

 small deep pools you find on steep rocky shores. Here 

 they swim rather rapidly in straight lines from stone to 

 stone, or from brink to brink, when they usually rest or 

 remain quite stationary. They seem to crawl badly, but 

 dart, like some spiders, on their prey from among the 

 weeds, or 



" Under rocks their food in jointed armour watch." 



The Zcbrida, a new genus of Mr. White and myself, 

 was dredged in about six fathoms from the mouth of 

 the Pantai river, on the coast of Borneo. It is a torpid, 

 though elegant little Crustacean, having all the apathetic 

 peculiarities of the Lambrus and Parthenope. The species 



VOL. II. 2 K 



