76 A. Alcock — Oarcinological Fauna of India. [No. 1, 



which the last 2 are very much smaller 



than the first 3 T. oculea. 



[2, Front convex and markedly prominent 

 beyond the supra-orbital angles : cara- 

 pace little transverse, its antero-lateral 

 borders cut into five teeth of nearly equal 



size Thalamonyx graci- 



li'pes']. 



Thalamita prymna (Herbst) Kossmann. 



The following names are, in my opinion, all synonymous, namely: — 

 T. prymna, T. crenata, T. danm, T. stimpsoni and T. picta. But as it is 

 only occasionly that one encounters specimens that show a combination 

 or confusion of characters I prefer, for convenience, to consider the 

 usually accepted species as distinct. I believe, however, that Koss- 

 man's view as to the specific identity of all the Thalamitas with an 

 eight-lobed front combined with a very broad basal antenna-joint, 

 untenable as that opinion appears at first sight, is the correct one. 



46. Thalamita crenata (Latr.) Edw. 



Thalamita crenata, Latr., Milne Edwards, Hist. Nat. Crust. I. 461 : Gnerin in 

 Cuvier, Icon. Regne An. Crust. Texte p. 6 {cor. Thalamita admete Guerin, Icon. 

 Regne An. Crust, pi. i. fig. 4) : Riippell, 24 Krabben roth. Meer. p. 6, pi. i. fig. 2 : 

 Krauss, Sudafr. Crust, p. 25 : Stirapson, Proc. Ac. Nat. Sci. Philad. 1859, p. 39 : 

 A. Milne Edwards, Archiv. du Mus. X. 1861 pp. 365, 367 ; Nouv. Archiv. du Mus. 

 IV. 1868, p. 70 and IX. 1873, p. 166 : Heller, SB. AK. Wieu, XLIII. 1861, p. 356 

 and Novara Crust, p. 29: Martens, Verb, zool.-bot. Ges. Wien XVI. 1866, p. 381 : 

 Hilgendorf, MB. AK. Berl. 1878, p. 800 : Hoffmann in Pollen and van Dam, Faun. 

 Madagasc, Crust, p. 9: Lenz and Richters, Abh. senck. Ges. Frankf. XII. 1881, 

 p. 422 : Miers, Zool. H. M. S. Alert, pp. 184, 232, 518, 540 ; and Challenger 

 Brachyura p. 199 : Muller, Verh. Ges. Nat. Basel, VIII. 1876, p. 475 : de Man, 

 Journ. Linn. Soc, Zool., XXII. 1887-88 p. 79; and in Weber's Zool. Ergebn. 

 Niederl. Ost-Ind. II. 1892, p. 285; and Zool. Jahrb., Syst., &c., VIII. 1894-95 

 p. 569: Cano, Boll. Soc. Nat. Napol. III. 1889, p. 218: Thallwitz, Abh. Zool. Mus. 

 Dresden 1890-91, No. 3, p. 47: G. Pfeffer, Mitt. Naturhist. Mus. Hamburg, VII. 

 1890, No. 8, p. 7: Ortraann, Zool. Jahrb., Syst., VII. 1893-94, p. 86; and in Semen's 

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



Thalamita prymna var. crenata, Richters in Mobius, Meeresf. Maurifc. p. 153. 



Carapace, length two-thirds the breadth, slightly convex, nearly 

 smooth, crossed transversely by fine faint granular ridges — one, broken 

 only by the cervical groove, between the last spines of the antero- 

 ateral borders, one across the middle of the gastric region, and a series 

 of four crescentic ridges (of which however the middle two are usually 

 obsolete) defining the gastric region anteriorly. 



Front cut into six rounded lobes of nearly equal size, not including 



I 



