1899.] A. Alcock — Carcinological Fauna of India. 79 



verse ridges are very distinct, moreover the mid-gastric ridge is conti- 

 nued, following the curves of the orbits, to the notch between the 1st 

 and 2nd spines of the antero-lateral borders : 



(2) the front is somewhat more prominent, the teeth are closer set 

 and the four middle ones are remarkably square- cut : 



(3) the teeth of the antero-lateral border end in spines and the 

 fourth tooth is quite rudimentary and may even be altogether absent : 



(4) the basal antenna-joint is nearer a fourth than two-ninths the 

 greatest breadth of the carapace in extent, and its orbital prolongation 

 is traversed by a row of spines of which from 1 to 3 are large : 



(5) except that they are free from hair and that all the spines are 

 large and much more acute, the chelipeds are like those of T. DanaSy 

 but the granules on the upper surface of the arm are less numerous, 

 and the faint ridge that separates the lower and inner surfaces of the 

 band in T. Danae is absent : 



(6) the propodite of the last pair of legs has its posterior border 

 serrated throughout : 



(7) the 6th abdominal tergura of the male is about as long as 

 broad, and has gently convergent sides. 



In the Indian Museum are 35 specimens, from the Andamans, 

 Nicobars, Mergui, and Madras coast (besides 1 from Samoa). 



49. Thalamita pida, Stimpson. 



Thalamita picta, Stimpson, Proc. Ac. Nat. Sci. Philad. 1858, p. 39 : A. Milne 

 Edwards, Archiv. du Mus. X. 1861, pp. 362, 367, and Nouv. Arohiv. du Mas. IX. 

 1873, p. 164, pi. iv. fig. 4 : Hilgendorf, MB. Ak. Berl. 1878, p. 800 : Miers, Zool. 

 H. M. S. Alert, pp. 518, 540 : Cano, Boll. Soc. Nat. Napoli, III. 1889, p. 217. 



Differs from T. prymna in the following slight particulars : — 



(1) the basal antenna- joint is not so broad and its crest is tooth- 

 like, having a smooth entire edge : 



(2) the two middle frontal teeth project more than the others. 



In the Indian Museum there is a single specimen from the Anda- 



60. Thalamita Stimpsoni, A. M. Edw. 



Thalamita stimpsoni, A. Milne Edwards, Archiv. du Mus. X. 1861, pp. 362, 367, 

 pi. XXXV. fig. 4, and Nouv. Archiv. du Mus. IX. 1873, p. 164 : ? Tozzetti, Magenta 

 Crust, p. 71, pi V. figs. 4 a-f: Miers, Ann. Mag. Nat. Hist. (5) V. 1880, p. 238 ; and 

 Zool. H. M. S. Alert, pp. 184, 232; and Challenger Brachyura, p. 198: Tenison 

 Woods, P L. S. N. S. Wales, V. 1880-81, p. 118 : Haswell, Cat. Austral. Crust, p. 80 : 

 Miiller, Verh. Nat. Ges. Basel VIII. 1886, p. 475 : Cano, Boll. Soc. Nat. Napol. III. 

 1889, p. 217 : Ortmann, Zool. Jahrb., Syst., VII. 1893-94, p. 85, and in Semon's 

 Forschungsr. (Jena. Denk. VIII, ) Crust, p. 46. 



