57 



Hyastenus Sebm, "VVhite, List of Specimens of Crust. in Brit. Mus. 



p. 6. 



Upper surface somewhat roughish, and covered with a delicate 

 down. 



Cancer araneus cornutus alter, Seba, Thes. iii. 45. t. 18. f. 12. 



Hab. Philippine Islands. From the coUection of Mr. Cuming. 



Also found by Capt. Sir Ed\vard Belcher, C. B. 



Family Parthenopid.e. 

 Ceratocarcinus, Adams & White. 



Form of the carapace somcAvhat pentagonal ; the sides, over the 

 insertion of the first pair of legs, produced into a large spiue directed 

 slightly forwards ; front wide and prominent, projecting on each side ' 

 in the form of conical horns, widely separate from each other. Eyes 

 rather small, peduncles short, the eye fitting into a groove on the side 

 of the beak. Outer antennae considerably developed, the terminai 

 appendages at least half the length of the whole antennae, and pro- 

 jecting beyond the horns of the beak. 



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

 vrist 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 lašt three pairs ; the taršai 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 taršai joints of these legs thick ; the claw at the end 

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

 known. 



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

 (Crust. i. 349), and, likę 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 & "VVhite. 



Carapace pentagonal, depressed, the iateral angles very sharp ; 

 the front very "vvide, lamelliform, dilated, rounded, slightly notched 

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

 deepish notch on the side. Outer antennse with the terminai 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 



