172 Carcinological Fauna of India. 



with a wide hiatus at base when closed, both with a strong tooth on 

 their opposed margins near the base, and with the outer margins 

 carinate. In the female the chelipeds differ only in being much less 

 robust, and in having the fingers much more closely apposable and 

 toothless. Ambulatory legs long and slender : the dactylus of the last 

 pair strongly falcate. 



[The basal antennal joint has one or two spines at its distal end, 

 and the free portion of the antenna is much shorter than the carapace.] 



Length of adult, 6 to 7 millim. 



In the Museum collection, from the Persian Gulf. Ex coll. W. T. 

 Blanford. 



Achseus lacertosus, Stimpson. 



Achseus lacertosus, Stimpson, Proc. Acad. Nat. Sci. Philad., 1857, p. 218. 



Achseus hreviceps, Haswell, Proc. Linn. Soc, N. S. Wales, Vol. IV. 1879, p. 433 

 (sec. Haswell). 



Achseus lacertosus and hreviceps, Haswell, Cat. Austr. Stalk and Sess. eyed 

 Crust., p. 3. 



Achseus lacertosus Miers, Zool. " Alert," pp.181 and 188; and "Challenger" 

 Brachyura, p. 8. 



Achseus lacertosus, J. R. Henderson, Trans Linn. Soc, Zool., 1893, p. 341. 



Carapace triangular, with the regions fairly well delimited and the 

 surfnee quite smooth beneath a slight pubescence : hepatic region with 

 a horizontal laminar tooth. Rostrum as long as wide, bilobed. An- 

 tennas filiform, the free portion longer than the carapace. Eye-stalks 

 long, slender, smooth. Chelipeds much stouter than the other legs, 

 the meropodite being the stoutest joint, and the hand being incurved 

 and the fingers compressed. The ambulatory legs are long and slender, 

 the first pair being more than three times the length of the carapace : 

 the dactyli of the last two pairs are strongly falcate. 



Length of adult about 6 millim. 



In the Museum collection are numerous specimens from the Anda- 

 mans, from Palk Straits, and from the Orissa Coast. 



Achseus ajjinis, Miers. 



Achseus affinis, Miers, Zoology of the ' Alert,' pp. 181 and 188, and " Challenger " 

 Brachyura, p. 8. 



Achseus affinis, de Man, Archiv. f. Naturges., LIII. 1887, p. 218. 



Achseus affinis, Henderson, Trans. Linn. Soc, Zool. (2) V. 1893, p. 341. 



Achseus affinis, Ortmann, Zool. Forsch. in Austr. and Malay Arch., Jena, 1894, 

 p. 37. 



" Carapace subtriangular and moderately convex, with the surface 

 uneven but the regions not very distinctly defined ; the post-orbital 



18 



