1899.] A. Alcock — Carcinological Fauna of India. 27 



Alliance II. Lupoida. 



ScYLLA, De Haan. 



Scylla, De Haan, Faun. Japon. Crust, p. 11: A. Milne Edwards, Ann. Sci. Nat., 

 Zool., (4) XIV. 1860, pp. 228, 249, and Archiv. du Mus. X. 1861, p. 347 : Miers, 

 Challenger Brachyura, p. 184. 



Carapace transverse, broad, moderately convex, v^^ith an almost 

 unbroken surface. 



Front proper well delimited from the inner supra-orbital angles, 

 cut into four teeth : its breadth (not including the supra-orbital angles) 

 is between a fourth and a fifth the greatest breadth of the carapace. 



Antero-lateral borders oblique, arched, longer than the postero- 

 lateral, cut into 9 teeth of nearly equal size. 



Orbit without any dorsal inclination : two nearly closed fissures in 

 its upper wall : the inner angle of the lower border dentiform and pro- 

 minent. The antennules fold nearly transversely. 



Basal antenna-joint short and broad, its antero-external angle pro- 

 duced to form a lobule lying in the orbit : the flagellum, which is of 

 good length, stands in the orbital hiatus. 



Epistome sufficiently long fore and aft, not sunken. Buccal cavern 

 squarish, broader than long : the efferent branchial channels cavern- 

 ous, but not defined by ridges. 



Chelipeds massive, longer than any of the legs : arm wrist and 

 hand with definitely placed spines : hand deep and full, not prismatic, 

 not costate. 



Legs stout, moderately compressed : in the fourth pair the merus 

 and carpus are shortened and broadened, and the propodite and 

 dactylus are typically foliaceous for swimming. 



Abdomen of male rather broadly triangular, consisting of 5 seg- 

 ments, the 3rd-5th terga being fused. The first tergum is much con- 

 cealed beneath the carapace. 



10. Scylla serrata (Forsk.) De Haan. 



Cancer serratus, Forskal, Descr. Anim. p. 90. 



Cancer olivaceus, Herbst, Krabben, II. V. 157, pi. xxxviii. fig. 3. 



Portunus tranqueharicus, Fabricius, Ent. Syst. Suppl. p. 366; Bosc, Hist, Nat. 

 Crust. I. p. 219 ; Latreille, Hist. Nat. Crust. VI. p. 16 and Encycl. Meth. X. p. 191. 



Portunus serratus, Riippell, 24 Krabben roth. Meer. p. 10, pi. ii. 



Lupea tranqueharica, Milne Edwards, Hist. Nat. Crust. I. 448. 



Zupea lohifrons, Milne Edwards, Hist. Nat. Crust. I. 453 {fide A. M. Edw.), 



Scylla serrata De Haan, Faun. Japon. Crust, p. 44 : Kranss, Sudafr. Crust, p. 25 : 

 A. Milne Edwards, Ann, Sci. Nat. Zool. (4) XIV. 1860, p. 252, and Archiv. du Mus. 

 X. 1861, p. 349, and Nouv. Archiv. du Mus. IX. 1873, p. 162, and in Maillard's 



