y8 A. Alcock — Carcinological Fauna of India. [No. l r 



23. Atergatis floridus, (Rumph). 



Cancer floridus, Rnmpb, Ainboinsch. Rariteitk. p. 16, pi. viii. fig. 5: Linnaeus, 

 Sysfc. Nat. (xii) p. 1041. 



Cancer ocyroe, Herbsfc, Krabben, III. ii. 20, pi. Hv. fig. 2 : Milne Edw. Hist. Nat. 

 Crust. I. 375. 



Atergatis floridus, De Haan, Faun. Jap. Crust., p. 46: Krauss, Sudafr. Crust, 

 p. 27: Dana, U. S. Expl. Exp. Crust, pt. I. p. 159, pi. vii. fig. 4 : Stimpson, Proc. 

 Ac. Nat. Sci. Phila. 1858, p. 32 : Heller, Novara Crust, p. 8 : A. Milne Edwards, 

 Nouv. Archiv. du Mus. I. 1865, p. 243 ; and IX. 1873, p. 186 : Targioni Tozzetti, 

 Magenta Crost. p. 24 : Miers, P. Z. S. 1877, p. 133, and Ann. Mag. Nat. Hist. (5) V. 

 1880, p. 231, and Zool. H. M. S. Alert, pp. 182, 207, and Challenger Bracbyura, 

 p. 112 : Haswell, Cat. Austral. Crust, p. 41 : P. Muller, Verh. Ges. Basel VIII. 1886, 

 p. 474 : de Man, Arcb. fur Naturges. LTII. 1887, i. 245, and Journ. Linn. Soc. Zool., 

 XXII. 1888, p. 24, and Weber's Zool. Ergeb. Niederl. Ost.-Ind. II. 1892, p. 277 : 

 A. 0. Walker, Journ. Linn. Soc, Zool., XX. 1890, p. 109 : J. R. Henderson, Trans. 

 Linn. Soc., Zool., (2) V. 1893, p. 352 : Ortmann, Zool. Jahrb. Syst. VII. 1894, 

 p. 460, and in Semon's Forschungsr. (Jena. Denkschr. VIII) Crust, p. 51. 



Carapace, length about t 7 q breadth ; its surface of perfectly smooth 

 texture, but rendered lumpy by broad shallow depressions that faintly 

 define and subdivide the regions ; tbe crest of the antero-lateral border 

 is sharp and ends at a very distinct tubercle at the lateral epibianchial 

 angle. 



The front forms with the antero-lateral borders a semicircle. The 

 orbits are rather large, their width being more than one-third that of 

 the front* 



External maxillipeds free from hair on the surface : tbe sternum 

 and the surface of all parts of the appendages except the hands (which 

 have some rough reticulations on the outer surface) are smooth. 



Chelipeds equal, the upper edge of the merus and hand strongly 

 and sharply carinate ; the fingers fluted as usual. Legs with crested 

 edges to the long joints, as in A. integerrimus. 



Colours in spirit, yellow; carapace covered with symmetrically 

 disposed brown spots and confluent blotches, chelipeds and legs with a 

 few faint brown spots, fingers blackish with whitish teeth and tips. 



86 specimens from the Andamans, Mergui, Ceylon, Laccadives and 

 Karachi. 



24. Atergatis sp. 



There is, in the Indian Museum, a little specimen of an Atergatis, 

 which may perhaps be the A. asperimanus insufficiently characterized 

 by White in the P. Z. S. 1847, p. 224 and in the Annals and Magazine 

 of Natural History, 1848, Yol. II. p. 285, as follows :— 



" Carapace with its latero-anterior sides with a cutting edge, part 



