224 A. Alcock — Carcinological Fauna of India. [No. 1, 



Trapezia glaberrima, Krauss, Sndafr. Crust, p. 35. 



Tetralia glaberrima, Dana, U. S. Expl. Exp. Crust, pt. i. p. 263, pi. xvi. fig. 3: 

 Stimpson, Proc. Ac. Nut. Sci. Philad. 1858, p. 38 : A Milne Edwards, Nouv. Archiv. 

 du Mus. IX. 1873, p. 262 : Kossraann, Reise roth. Meer. Crust, p. 46 : Lenz and 

 Kichters, Abh. senck. Ges. XII. 1881, p. 422; de Man, Archiv. fur Naturges. LIII. 1887, 

 i. p. 321 : J. R. Henderson, Trans. Linn. Soc, Zool., (2) V. 1893, p. 366 : Ortmann. 

 Zool. Jahrb., Syst., VII. 1893-94, p. 485, and X. 1897, p. 209, and in Semon's 

 Forschungsr. (Jena. Deuk. VIII.) Crust, p. 53 : Zehntner, Rev. Suisse Zool. II. 1894, 

 p. 157. 



Tetralia nigrifrons, Dana, Proc. Ac. Nat. Sci. Philad. 1852, p. 83, and U. S. 

 Expl. Exp. Crust, pt. i. p. 262, pi. xvi. figs. 2a-d : A. Milne Edwards, Nouv. Archiv. 

 du Mus. IX. 1873, p. 262: Hilgendorf, MB. Ak. Berl. 1878, p. 798. 



Trapezia serratifrons, Lucas iu Jacquinot's Voy. Astrolabe, Zool., III. Crust, p. 47, 

 pi. iv. fig. 20. 



Tetralia Isevissima, Stimpson, Proc. Ac. Nat. Sci. Philad. 1858, p. 38. 



Tetralia cavimana, Heller, Abh. zool.-bot. Ges Wien. XI. 1861, p. 14, and SB. 

 Ak. Wien. XLIII. 1861, p. 353, pi. iii. figs. 24, 25, and Novara Crust, p. 26 : Miers, 

 Phil. Trans. 168, 1879, p. 488, and Zool. H. M. S. Alert, pp. 518, 537 : de Man. 

 Notes Leyden Mus., II. 1880, p. 180 : R. I. Pocock, Ann. Mag. Nat. Hist. (6) V. 1890, 

 p. 73: Whitelegge, Mem. Austral. Mus. III. 1897, p. 138. 



Tetralia heterodactyla, Heller, Abh. zool.-bot. Ges. Wien. XI. 1861, p. 14, and 

 SB. Ak. Wien. XLIII. 1861, p. 354. 



Carapace about five-sixths as long as broad, flat smooth and shiny, 

 with occasionally a faint short and distant pubescence near the frontal 

 and lateral margins. 



The front is finely and evenly denticulate, is almost straight, and 

 is generally but not always separated from the similarly denticulate 

 supra-orbital angle by a slight and inconspicuous break. The lateral 

 borders are very slightly curved in their anterior half and are moderate- 

 ly convergent in their posterior half : they show no trace of a spine or 

 notch, at least in the adult. 



The chelipeds are very unequal both in length and bulk in both 

 sexes, but even more so in the male than in the female. 



In the male the larger cheliped is a good deal more and the smaller 

 a good deal less than twice the length of the carapace : in the female 

 the larger is about If times and the smaller about 1J times the length 

 of the carapace. 



The arm has the distal end of its anterior border expanded and 

 finely denticulate : a little down and a few hairs are present on the 

 outer surface of the wrist hand and finger, especially in the larger 

 cheliped. 



At the base of the larger hand, on the upper part of the outer 

 surface, is a roundish pit of variable size and depth and usually full of 

 hair. 



The legs are rather short and stout and end in a curious little 



