62 Zoological Society. 



of the beak. Outer antennae considerably developed, the terminal 

 appendages at least half the length of the whole antenna?, and* pro- 

 jecting beyond the horns of the beak. 



First pair of legs much-elongated ; the sides nearly parallel ; the 

 wrist somewhat pear-shaped, without spines on the inside, the edges 

 of the pincers meeting and serrated. The second pair of legs longer, 

 more slender than the last three pairs j the tarsal joint slender and 

 elongated ; fourth and fifth pairs of equal length ; the fifth pair, as in 

 Eumedonus, placed so high as nearly to conceal the insertion of the 

 fourth pair ; the tarsal joints of these legs thick ; the claw at the end 

 translucent. Abdomen of male as in Eumedonus ; the female un- 

 known. 



This genus is closely allied to Eumedonus of Prof. Milne Edwards 

 (Crust, i. 349), and, like it, comes from the Eastern Seas. 



Ceratocarcinus longimanus, n. s., List of Specimens of Crust, in 

 Brit. Mus. p. 125. 



Two pointed transverse tubercles, tufted with hair at the end, on 

 the back of the carapace, behind the eyes ; the first pair of legs 

 covered with minute warts and with several deep longitudinal grooves ; 

 the pincers blackish brown, except at the base. 



Hab. North coast of Borneo (Balambangan) : British Museum. 

 Presented by Capt. Sir Edward Belcher, C.B., R.N. 



When alive, according to the observations of Arthur Adams, Esq., 

 who found it, the colour of this species is blood-red, with five light 

 bands across the carapace. 



Gonatonotus, Adams & White. 



Carapace pentagonal, depressed, the lateral angles very sharp ; 

 the front very wide, lamelliform, dilated, rounded, slightly notched 

 at the end. Eyes large, prominent; peduncles short, inserted in a 

 deepish notch on the side. Outer antennae with the terminal appen- 

 dage elongated. 



First pair of legs thickish ; the wrist rounded and spined on the 

 inside, the claws serrated on the edge; third and fourth pairs of 

 legs rather longer than the second and fifth ; the tarsal joints of the 

 second, third, fourth and fifth pairs of equal size and thickness ; the 

 fifth pair of legs inserted above the fourth pair. 



Abdomen of female seven-jointed ; three or four of the basal joints 

 seen from above. Male unknown. 



This genus is allied to Eumedonus. 



Gonatonotus pentagonus, n. s., List of Specimens of Crust, in 

 Brit. Mus. p. 125. 



Carapace above closely verrucose, the warts depressed ; a strong- 

 ish ridge across the back, extending from one lateral angle to the 

 other, with two tubercles in the middle ; the front grooved down the 

 middle ; the centre of the back with two longitudinal impressions ; 

 terminal joint of abdomen in female verrucose. 



First pair of legs verrucose ; the pincers grooved. 



Mr. Adams found this species on the coast of Borneo. When 



