202 A. Aleock — Carcinological Fauna of India. [No. 1, 



123. Actumnus tomentosus, Dana. 



Actumnus tomentosus, Dana, Proc. Ac. Nat. Sci. Philad. 1852, p. 82 ; and U. S. 

 Expl. Exp. Crust, pt. i. p. 243, pi. xiv. figs. 2a-c : A. Milne Edwards, Nouv. Archiv. 

 du Mus. I. 1865, p. 285, and IX. 1873, p. 194 : ? Tozzetti, Magenta Crust. \ 56, pi. iv. 

 figs. 22, 24, 26, 29 : Haswell, Cat. Austral. Crust, p. 73 : Etheridge, Mem. Austral. 

 Mus. 1889, pp. 34, 36. 



Carapace subcircular, rather more than § as long as broad, 

 moderately convex, covered with a very dense short smooth tomentum. 

 Much the same tomentum covers the exposed surfaces of the legs and 

 chelipeds (except the lower and distal part of the outer surfaces of the 

 hands), and the legs are also fringed with long fine hairs. 



The regions are fairly well delimited and areolated, the areolae 

 being moderately convex : on the undenuded carapace the areolae are 

 faint. 



Front about two-fifths the greatest breadth of the carapace, cut 

 into two finely denticulated lobes, the outer angles of each of which, 

 though sharply separated from the supra-orbital margin, do not form 

 distinct lobules. 



Orbital margin finely denticulate, the lower more markedly so than 

 the upper ; in the upper margin are two broad notches, the outer the 

 more distinct ; in the lower margin, just below the outer angle, is a 

 narrow fissure ; outer orbital angle dentiform. 



Antero-lateral borders about two-thirds the length of the concave 

 postero-lateral, very regularly cut into 3 uniform teeth similar to the 

 outer orbital angle. 



Chelipeds unequal : arm smooth ; inner angle of wrists sharp, 

 their inner border finely beaded, a few scattered granules on their 

 upper and outer surfaces ; upper and outer surfaces of hands covered 

 with pearly granules which become obsolescent or obsolete near the 

 lower border of the larger hand ; dactyli longitudinally grooved, beaded 

 at base. 



Denuded legs nearly smooth. 



In the Indian Museum are 53 specimens, from the Andamans, the 

 Orissa Coast up to 30 fms., Palk str. and Cheduba. 



Our specimens completely agree with Dana's figure, and are easily 

 distinguished from A. setifer by the less convex and less distinctly 

 areolated carapace. 



124. Actumnus setifer, (De Haan), A. M. Edw. 



Pilumnus setifer, De Haan, Faun. Japon. Crust, p. 50, pi. iii. fig. 3 (Xantho). 

 Actumnus setifer, A. Milne Edwards, Nouv. Archiv. du Mus. I. 1865, p. 287, 

 pi. xv. figs. 5-56: Richters in Mobius' Meeresf. Maurit. p. 148: Miers, Zool. 



