358 



58 



Orbital niaigiii nol fissured above, a triangular notch below the outer angle. 

 The antennary flagelUim arises in the orbital hiatus. 



There are three anlero-lateral teeth, the first sub- 

 truncate, the second and tliird acutely pointed. Between 

 the first tooth and the orbital angle there is a spinule. 

 Postero-lateral margins considerably longer than the 

 antero-lateral, straight. 



Chelipeds very unequal, granulous, granules small, 

 beadlike, and dense on the palms. Pollex of larger 

 hand short, with four principal teeth. The dark color 

 does not quite cover the surface of either thumb. 



Dimensions. — Ç, length 38 mm., width 57 mm. 



Koh Chang, 1 fath., coral; I— III; 3 c? 2 ? (1 ? type). 



In shape resembles A. tomentosiis Dana (pi. XIV, 

 figs. 2a~c, Crust. U. S. Expl. Exped.) which has the 

 carapace without granules and covered with a tomen lu m . 



Fig. 42. Actiimnus cltangcnsis, 



Koh Chang, c?, •i^^ mm. wide: 



a, right cliela ; /). left chela. 



Actuninus squamosus (de Haan). 



Cancer (Piluiunus) squamosus de Haan, Fauna Japon., Crust., p. .'in, 18.35. 



Actumnus squamosus A. Milne Kdwahds, Nouv. Arch. Mus. Hist. Nat., Paris, I, p. :iK(i, pl. XVIH, fig. (i, (ia, 

 (il), Oc, 1800. 



20 miles E. S. E. of Koh Samit, 13 14 falb., sandy mud, shells; II. 2; Id". 

 Between Koh Mesan and Cap Liant, 9 fath.; II. 4; 1 c?. Ofi" Koh Sakait, 5—6 fath., 

 sand; II. 23; 1? ovig. Koh Chuen, 30 fath., shell bottom; II; 1 c? 1 ?• Between 

 Koh Rin and Clifi' Rock, (N. of Koh Kram), 15 fath.; III. 2; 1 ?. Koh Kam, 5 fath., 

 gravel; II. 6; 3 0* 3? (1 ovig.) 2 juv. 



Parapleurophrycoides roseus Nobili. 



ParapleuropUnjcoides roseus Nobili, Bull. Mus. Hist. Nat., Paris, 1900, No. ,'>, p. 9. 



About 15 miles W. of Koh Kut, about 30 fath. (s. m.); I. 28; 1 juv., 125 mm. 

 long, 14 mm. wide, front OO mm. 



This corresponds very well with Nobili's preliminary description. The eyes 

 are of huge size, projecting sideways beyond the orbits. Outer angle of orbit 

 spiniform, as is al.so the lower inner angle; lower margin serrulate. Antenna standing 

 loosely in the orbit, the joint following the basal joint barely reaching the front. 



Heteropanope sexangula Rathbun. 



Plate II, fig. 0. 

 Heterqpanope sexangula Ratiirun, Proc. Biol. Soc Washington, XXII, p. IH, 1909. 



Carapace narrow, hexagonal, little convex, surface tomentose, uneven, a blunt 

 transverse ridge on each frontal lobe, and on each protogastric lobe, and a few 

 irregular nodules on the branchial region. 



