1896.] A. Alcock — Carcinologiral Fauna of India. 145 



Calappa tuherculata, Fabricius, Ent. Syst., Suppl., p. 345 : Bosc, Hist. Nat. Crast. 

 I. 183: Latreille, Hist. Nat. Crust, et. Ins., V. 393: Desmarest, Consid. Gen. 

 Crust , p. 109, pi. 10, fig. 1 : Milne-Edwards, Hist. Nat Crust., II. 106 : Owen, 

 Zool. Beechey's Voy. " Blossom," Crust, p. 80 : Krauss, Siidafr. Crust., p. 52 : Dana, 

 U. S. Expl. Exp., Crust, pt. I. p. 393: Stimpson, Proc. Ac. Nat. Sci. Phiiad., 1858, 

 p. 162: Heller, Crust. Eoth. Meer. in SB. Ak. Wien, 1861, XLIII. p. 372, and 

 ' Novara' Crust, p. 69 : Hess, Archiv. fur Naturges. XXXI. 1865, pp. 157 and 172 : 

 E. Martens, Verb, zool.-bot. Ges. Wien, XVI. 1866, p. 381 : A. Milne-Edwards, 

 Nouv. Archiv. du Mus. IV. 1868, p. 72, and X. 1874, p. 55 : Hilgendorf in Von Der 

 Decken's Eeisen in Ost.-Afr. III. i. 92 : Brito Capello, Jorn. Sci. Nat. Lisboa, III. 

 1870-71, p. 133, pi. ii. fig. 8 : Hoffman in Pollen and Van Dam, Faun. Madagasc. 

 V. 2. 1874, Crustacea, p. 25 (part), pi. vi. figs. 39, 41, 42 : Brocchi, Ann. Sci. Nat. 

 (6) II. 1875, Art. 2, p. 101, pi. xviii. figs. 160, 161, (male appendages): Kossmann, 

 Eeise Roth. Meer., Crust., p. 63 : Streets, Bull. U. S. Nat. Mus. VII. 1877, p. 

 116 : Hilgendorf, MB. Ak. Berl. 1878, p. 809 : Richters, in Mobius, Meeresf. 

 Maurit. p. 157 : de Man, Notes Leyden Mus. II. 1880, p. 184, and Archiv. fur 

 Naturges. LIII. i. 1887, p. 388 : E. Nauck, Zeits. Wiss. Zool. XXXIV. 1880, p. 46 

 (gastric teeth) : Lenz and Richters, Abh. Senck. Ges. XII. 1881, p. 425 : MuUer, 

 Verh. Ges. Basel VIII. 1886, p. 473. 



Calappa tuberculosa, Guerin Meneville, Icon. R. A., Crust, pi. 12, figs. 2, 2a, 2&. 



Calappa sandivicliien {Calappa tuberculnta var.) Eydoux and Souleyet Voy. 

 ' Bonite,' Vol. I., Zool., p. 245, pi. iii., figs. 9, 10. 



Length of carapace a little more than half the extreme breadth. 

 In the anterior two-thirds the surface of the carapace is tuberculate 

 and granular, in the posterior third it is marked with squamiform 

 tubercles and beaded ridges : the antero-lateral borders are coarsely 

 dentate or serrate. 



Clypeiform expansions greatly developed, their breadth being equal 

 to their length : their anterior border shows the points cf four teeth, 

 but the postero-lateral border forms a continuous curve, broken only 

 on the under surface by three or four faint sutures. 



Posterior border of the carapace beaded, unarmed. 



Outer part of the pterygostomian regions densely hairy. 



Front emarginate, not projecting beyond tlie level of the orbits, its 

 breadth at the tip markedly less than the breadth of the orbit. 



The endostomial septum extends vertically from the level of the 

 front to the level of the mouth ; its anterior border strongly convex 

 and projecting. 



Transverse wing-like expansion of the distal end of the arm with 

 its edge four-lobed. Outer surface of palm with numerous sharp tuber- 

 cles : upper surface of wrist tuberculate : anterior end of arm with 

 some sharp granules : crest of palm crenulate, not sharply dentate. 



Andamans, Nicobars, Maldives, Laccadives, Persian Galf. 



In the very young, the extreme length of the carapace is not much 



