1898.] A. Alcock — Gar^cinological Fauna of India. 97 



pitted, no part being free from pitting except a small area in the mid- 

 gastric region : the outer surface of the chelipeds and legs also is quite 

 rough, from pitting : 



(3 ) the creases that serve to show the cardiac region are much 

 larger and deeper : 



(4) the crest that bounds the endostome in front is higher : 



(5) the external raaxillipeds are closely covered, like a door-mat, 

 with long thick bristles ; and remarkable comb-like tufts of long stiff 

 bristles are found along the front border of the ischium of the chelipeds 

 and along the lower border of the ischium and merus of all the legs : 



(6) the surface of the sternum is closely covered with confluent 

 granules visible to the naked eye. 



All these differences are to be noted in a large male with a carapace 

 J 19 millim. broad from Ceylon, in a medium-sized male (70 millim. 

 broad) from the Andamans, and in two small females (59 and 44 millim. 

 respectively) from widely different parts of the Andaman group — these 

 four specimens being in the Indian Museum collection. 



22. Atergatis roseus (Ruppell). 



Carpilius roseus and marginatus Ruppell, 24 Krabben roth. Meer. p. 13, pi. iii. 

 fig. 3 and pi. vi. fig. 7 ; p. 15, pi. iii. fig. 4. 



Cancer roseus and marginatus, Milne Edwards Hist. Nat. Crust. I. 374, 375. 



Atergatis roseus and marginatus, De Haan, Faun. Japon. Crust, p. 17 (names 

 only): 



Atergatis roseus, Heller SB. AK. Wien, XLIII. 1861, p. 309 : A Milne Edwards, 

 Xouv. Archiv. du Mus. I. 1865, p. 239: Kossmann, Reise roth. Meer. Crust, p. 19 : 

 Richters in Mobius Meeresf. Maurit. p. 145 : Haswell, Cat. Austr. Crust, p. 42 : 

 Cano, Boll. Soo. Nat. Nap. III. 1889, p. 189 : Ortmann, Zool. Jahrb., Syst., VII. 

 1894, p. 461. 



Atergatis marginatus, Krauss, Sudafr. Crust, p. 28 : Dana U. S. Expl. Exp. Crust, 

 pt. I. p. 158 : A. Milne Edwards, Nouv. Archiv. du Mus. I. 1865, p. 240. 



Atergatis laevigatus, A. Milne Edwards, Nouv. Archiv. du Mus. I. 1865, p. 241, 

 pi. xv. figs. 4-4a : Henderson, Trans. Linn. Soc. Zool. (2) V. 1893, p. 352. 



Atergatis scrobiculatus, Heller, Abhand. zool.-bot. Ges. Wien, XI. 1861, p. 5, and 

 SB. AK. Wien, XLIII. 1861, p. 310 : A. Milne Edwards, Nouv. Archiv. du Mus. I. 

 1865, p. 242. 



Carapace of much the same proportions as A. integerrimus, but 

 with a perfectly smooth dull surface; no indication whatever of regions ; 

 the crest of the antero-lateral borders blunt and ending smoothly, 

 without any ridge or tooth, at the lateral epibranchial angle. 



Front, orbits, external maxillipeds and legs as in A. integerrimus. 

 Fingers fluted, but upper edge of hand rounded, not crested. 



Colours in spirit, brownish yellow, fingers blackish brown with 

 whitish teeth and tips. 



22 specimens from Karachi, and Madras coast. 

 J. ii. 13 



