ATTSTKAUAN MAIACOSTEACA. 211 



three elongated and convex prominences or tubercles, which do 

 not terminate in spines, and with four triangular marginal teeth, 

 of which the two posterior are very large and tipped each with 

 a small mobile spinule. Antennules and antenna small and 

 slender ;, dactyli of raptorial limbs without teeth on their inner 

 margins, which are furnished with two rows of granules in their 

 basal, and with a thin cutting edge in their terminal half ; basal 

 part of the dactylus considerably thickened externally, the styli- 

 form terminal portion acute and usually sinuate. Distal pro- 

 longation of the base of the uropoda ending in two rather short 

 strong spines — the outer of which has no tooth on its inner 

 margin. Length nearly 4 in. [M.~] 



Port Denison ; Torres Straits ; Swan River. A species of 

 wide range throughout the Oriental Region, very common on 

 coral reefs in tropical Australia. 



389. Gonodactylus graphurus. • A.M. 



Gonodactylus grapliurus, White, List Crust. Brit. Mus., p. 85 ; 

 Miers, Ann. Mag. R H. (4), xvi., p. 344, and (5), v., p. 120, 

 pi. iii., fig. 9. 



This species differs from the preceding in the presence of a 

 small median keel between the innermost prominences of the 

 sixth abdominal segment ; in the possession of seven closely-placed 

 prominences on the upper surface of the telson, the median 

 being the largest, the others becoming successively smaller, and 

 the median and sub-median being usually armed with spines ; in 

 the presence of six marginal spines, and in the presence of a 

 small tooth on the inner margin of the basal prolongation of the 

 uropoda. [_3£] 



Port Denison ; Port Curtis ; Cumberland Island ; Torres 

 Straits ; Port Essington, etc. Widely distributed in the Indo- 

 Pacific Region, and not uncommon on coral reefs within the 

 tropics in Australia, but rarer than the preceding. 



390. Gonodactylus trispinosus. 



Gonodactylus trispinosus, White, List Crust. Brit. Mus., p. 85; 

 Dana, U.S. Explor. Exped., Crust., i., p. 623 ; Heller, Reise der 

 Novara, Crust., p. 126 ; Miers, Cat. Crust., N.Z., p. 90, and Ann. 

 Mag. N.H. (5), v., p. 121, pi. iii., fig. 10. 



