234 PERCY SLADEN TRUST EXPEDITION 



surface. Two denticles on the antero-lateral margin. Postero-lateral margins strongly 

 convergent. Front very broad, slightly deflexed, divided into two subtruncate lobes. 

 Orbital margin crenulate, not fissured. Eyes large, peduncles stout. Basal joint of 

 antenna not nearly reaching the front. Epistome short. Efferent ridge strong. Merus 

 of maxillipeds broader than long, outer angle rounded, inner angle notched for the 

 insertion of the palpus. 



Chelipeds very unequal, outer surface very rough and pubescent. Arm stout, nearly 

 smooth ; wrist granulate, the granules increasing in size toward the palm. Larger palm 

 much swollen, covered with granules which increase in size towards the upper surface 

 where they become tubercles and are arranged in rows. Smaller palm about half as high 

 as the other, similarly roughened, the large granules being sharp. Fingers of large claw 

 roughened to near the tips, not gaping ; prehensile edges irregularly toothed, tips sharp 

 pointed, crossing when flexed. Fingers of small claw thin, curved, dactylus rough, 

 immovable finger smooth, punctate ; fingers not gaping ; prehensile edges sharp, entire, 

 fitting neatly together, tips small, curved and overlapping. 



Legs narrow, thin, margins granulate, upper edge of carpal segments terminating 

 in a denticle, margins scantily provided with long hairs. 



The genei'al aspect of this species is much like that of M. symbiotica Borradaile 

 (Fauna Maldives, i. 1902, p. 270, text-fig. GO), but the unequal chelipeds, the 

 peculiar fingers of the small claw, as well as the wider carapace and front, easily 

 distinguish it. 



169. Trapezia cymodoce (Herbst). 



Trapezia cymodoce Alcock (3), p. 219. 



Salomon ; 10 2, 7 ? : dredged, 10— 14fms. ; 1 2, ] ?. Peros, Coin ; 1 $, 1 ?. Egmont, 

 reef; 1 2, 2 ? : lagoon, 6 — 7 fms. ; 4 2, 3 ?. Diego Garcia, lagoon ; 1 2, 1 $ : 12 fms. 

 2 $. Cargados Carajos, 30 fms., Sta. B 2 ; 3 2, 2 ?. Saya de Malha, 26 fms., Sta. C 16 

 1$, 4 ?. Amirante, 29 fms., Sta. E 2; 12, 1 ? : 25—80 fms., Sta. E 11 ; 2 $, 1 ? 

 20—25 fms., Sta. E 13 ; 7 2,7 ? : 30 fms., Sta. E 21 ; 2 2, 3 ?. Seychelles, 34 fms., Sta. 

 F 8 ; 12, 2 $ (1 with Bopyrid). Praslin, reef; 2 2, 2 ?. Coetivy ; 4 <?, 5 ?. 



The specimens vary considerably in the length and sharpness of the lateral tooth, 

 and to a lesser degree in the form and prominence of the frontal teeth ; while the upper 

 border of the palm is sharp and its outer surface hairy. These characters connect the 

 species with the subspecies ferruginea. 



170. Trapezia cymodoce ferruginea Latreille. 

 Trapezia ferruginea Alcock (3), p. 220. 



Salomon; 6 2, 5 ? : dredged, 10 — 14 fms. ; 12, 1 ¥, varying toward T. guttata 

 Riippell. Peros, Coin ; 1 2, 1 ?■ Egmont, reef; 2 2, 2 ?. Seychelles, 20 fms., Sta. F 8 ; 

 2 ?. Praslin, reef; 2 2, I ¥■ Coetivy ; 2 2, 1 ?• 



The two specimens dredged at Salomon have the merus and carpus of the 

 legs spotted, the propodus and dactylus striped, the stripes having a tendency to 

 break up. 



