EDIBLE CRUSTACEANS OF NEW SOUTR WALES. 199 



NEPTUNUS PELAGICUS. 

 Cancer 2>€lagicus^ Linn. Syst. Nat. p. 101'2, 17G6. 

 Lupea ])elagica, Milne-Edw. Hist. Nat. Crust, i. p. 450, 1834. 

 Nephmus pelagicus, part. A. Milne-Edw. Arch. Mns. Hist. Nat. x. p. 320 



1861 ; Miers, Ann. Nat. Hist. (4) xvii. 1866, p. 221, and Catal. Crust. 



N. Zeal. p. 25, 1876 ; llaswell, Austr. Malacostr. p. 77, 1882, 



Common Sv/imming Crab. 



Plate L. 



Carapace wide, with very coarse granulations, without tubercles on the 

 gastric and cardiac regions. Teeth of the lateral margins short, wide at the 

 base ; ninth cpibranchial spine long, acute. Front six-toothed, the median 

 teeth smaller but never obsolete. Orbits divided above into three lobes by 

 two deep fissures, the middle lobe with a small spine at its external angle. 

 Anterior legs very long and slender. Anterior margin of the arm with three, 

 four, or even five spines ; there is also a single spine at the extremity of the 

 posterior margin. AV^rist with an acute spine upon its inner and a similar 

 smaller spine upon its outer surface. Hand usually very long and slender, 

 with three spines, two placed above the base of the mobile finger, and one 

 over the articulation of the hand with the wrist. 



This is the most common species of crab sent to the Sydney market, and 

 is very widely distributed throughout the Oriental region. It occurs at all 

 seasons, and is both used as food and as bait ; it is principally taken by the 

 seine, and weighs as much as a pound to a pound and a half. 



Genus II.- SGYLLA. 



Scylla, De Haan, Faun. Japon. Crust, p. 11, 1835. 



Carapace very wide and rather convex. Latero-anterior margins with nine 

 teeth, the ninth similar to the preceding. Basal joint of the external 

 antennse large, the flagellum inserted in the internal orbital hiatus. 

 Epistome well developed ; anterior margin of the buccal cavity separated by 

 a transverse groove from the posterior margin of the antenuary region. 

 Anterior legs short and robust : hand without longitudinal ridges. 



SCYLLA SEREATA. 



Cancer serratus, Forskal. 



Cancer oUvaceus, Herbst, Krabben u. Krebse, ii. p, 157, pi. xxxviii. fig. 3, 



1796. 

 Portunus tranqueharicus, Fabr. Ent. Syst. p. 366, 1798. 

 Lupea ironqiicharica, Milne-Edw. Hist. Nat. Crust, i. p. 448, 1834. 

 Liipea lolifrons, Milne-Edw. Hist. Nat. Crust, i. p. 453. 

 Scylla serrata, De Haan, Faun. Japon. Crust, p. 44, 1834 ; A. Milne-Edw. 



Ann. Sci. Nat. (4) 'xiv. p. 252, pis. i, ii. ISGO, and Nouv. Arch. 



Mus. X. p. 349, 1861 ; Miers, Catal. Crust. N. Zeal. p. 27, 1876 ; 



Haswell, Austr. Malacostr. p. 78, 1882. 

 ^cylldtranqiiebarica, Dana, F. S. Expl. Exped. xiii. Crust, part i, p. 270, 



1852. 



