EDIBLE CETJSTACEANS OF NEW SOUTH WALES. 199 



NEPTUNUS PELAGICUS. 



Cancer 'pdagiciis^ Linn. Syst. Nat. p. 1042, 1766. 



Lupea pelagica, Milne-Edw. Hist. Xat. Crust, i. p. 450, 1S34. 



Neptunus pelacjicus, part. A. Milne-Edw. Arch. Mus. Hist. Nat. x. p. 320 



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



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



Common Swimming 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 epibranchial 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 tho 

 posterior margin. Wrist 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.- SCYLLA. 



Scylla, De Haan, Eaun. Japon. Crust, j). 11, 1835. 



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

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

 antennae large, tlie 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 anteunary region. 

 Anterior legs short and robust : hand without longitudinal ridges. 



SCYLLA SEEEATA. 



Cancer serratus, Eorskal. 



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



1796. 

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

 Lupea iron quel) arica., Milne-Edw. Hist. Nat. Crust, i. p. 4i8, 1834. 

 Lupea lohifrons, Milne-Edw. Hist. Nat. Crust, i. p. 453. 

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



Ann. Sci. Nat. (4) xiv. p. 252, pis. i, ii. 1860, and Nouv. Arch. 



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



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

 Scylla franquelarica, Dana, U. S. Expl. Exped. xiii. Crust, part i. p. 270, 



1852. 



