78 A. Alcock — Garcinological Fauna of India. [No. 1, 



in Mobiua Meeresf. Maurifc. p. 153 : Tenisou Woods, P.L.S., N. S. Wales, V. 1880-81, 

 p. 118: Filhol, Crust. New Zealand, Miss, de Tile Campbell, p. 382 : (?) de Man, 

 Archiv. f. Natnrges. LIII. 1887, i. p. 334; and Journ. Linn. Soc, Zool., XXII. 

 1887-88, p. 78 pi. iv. figs 8, 9 ; and in Weber's Zool. Ergebn. Niederl. Ost— Ind. II. 

 1892, p. 285 ; and Notes Leyden Mus. XV. 1893, p. 285 j and Zool. Jahrb., Syst., 

 VIII. 1894-95, p. 569. 



Differs from T. crenata in the following particulars : — 



(1) the carapace is nearly three-fourths as long as broad, its poste- 

 rior border is nearer two-fifths than a third its greatest breadth, its 

 transverse ridges are very distinct, and the four crescentic ridges near 

 the anterior limit of the gastric region are all prominent, especially the 

 middle two : 



(2) the front, though otherwise similar, is more prominent : 



(3) a large part of the upper surface of the arm and wrist and at 

 least the dorsal half of the surfaces of the hand are granular, — the 

 granules being more or less squamiform ; the ridges that connect the 

 spines of the wrist are distinct ; there are 6 or 7 costae on the hand, 

 and the spines of the hand are much sharper : 



(4) the 6th abdominal tergum of the male is much broader than 

 long, and its sides are divergent in two-thirds of their extent and then 

 suddenly converge. 



In the Indian Museum are 20 specimens from the Andamans and 

 Mergui. 



48. Thalamita prymna {Herhst) . 



Cancer prymna, Herbst, Krabben, III. iii. 41, pi. Ivii. fig. 2. 



Thalamita prymna, Milne Edwards, Hist. Nat. Crust. I. 461 : Krauss, Sadafr. 

 Crust, p. 25: De Haan, Faun. Japon. Crust, p. 43, pi. xii. fig. 2: A. Milne Edwards, 

 Arcbiv. du Mus. X. 1861, pp. 360, 367, and Nouv. Archiv. du Mus. IX. 1873, p. 163': 

 Hess, Archiv. f. Naturges. XXXI. 1865, i. pp. 140, 171 : Hoffmann, in Pollen and 

 van Dam Faun. Madagasc. Crust, p. 9 : Kossmann, Crust, roth. Meer. p. 47 (part) : 

 Streets, Bull. U. S. Nat. Mus. VII. 1877, p. 108 : Neumann, Cat. Pod. Crust. 

 Heidelb. Mus. p. 24 : de Man, Notes Leyden Mus. II. 1880, p. 180 ; and Archiv. f. 

 Naturges. LIII. 1887, i. p. 333; and Journ. Linn. Soc. Zool. XXII. 1887-88, p. 75, 

 pi. iv. figs. 5, 6 ; and in Weber's Zool. Ergebn. Niederl. Ost— Ind. II. 1892, p. 285 ; 

 and in Zool.. Jahrb., Syst., VIII. 1894-95, p. 567 : Richters, in Mobius Meeresf. 

 Maurit. p. 153 : Miers. Ann. Mag. Nat. Hist. (5) V, 1880, p. 238 ; and Challenger 

 Brachyura, p. 197 : Sluiter, Tijds. Nederl. Ind. XL. 1881, p. 162 : Haswell, Cat- 

 Ausbrai. Crust, p. 80: Orfcmann, Zool. Jahrb., Syst., VII. 1893, p. 84; and in 

 Semon's Forsehungsr. (Jena. Denk, VIII.) Crust, p. 46 : Henderson, Trans. Linn. 

 Soc, Zool., (2) V. 1893, p. 372. 



Thalamita crassimana, Dana, Proc. Ac. Nat. Sci. Philad. 1852, p. 85 ; and U. S. 

 Exp1. Exp. Crust, pt. I. p. 284, pi. xvii. figs. 9a-d : Stimpson, Proc. Ac. Nat. Sci. 

 Philad. 1858, p. 39. 



Differs from T. crenata in the following particulars : — 



(1) the carapace is even less convex, and, as in T. Danx, its trans- 



