216 PERCY SLADEN TRUST EXPEDITION 



89. Leptodius sanguineus (Milne Edwards). 

 Xantho (Leptodius) sanguineus Alcock (3), p. 119. 



Peros, Coin ; 1 $, 3 ?. Salomon ; 1 $, 2 ?. Coetivy ; 1 $, 5 ?. Praslin ; 1 & 1 juv. 



90. Leptodius molokaiensis Rathbun. 



Leptodius molokaiensis Rathbun, 1906, p. 847, pi. 9, fig. 1, text-fig. 10. 



Salomon; 2 $. Amirante, 30 fms., Sta. E 21 ; 1 $, 1 ?. 



A male from Salomon is much larger than type ; C. 1. 13 mm., C. b. 19'5 mm. The 

 areolets of the carapace are more plainly marked ; the four lobes of front more deeply 

 separated ; two stout spines at inner angle of wrist. 



91. Leptodius nudipes (Dana). 



Leptodius nudipes Rathbun, 1906, p. 848, pi. 9, fig. 3. 

 Peros, Coin ; 1 $, 1 ?. Praslin, reef ; 1 $. 

 Length of $, Praslin, 14'6 mm., breadth 22 - 8 mm. 



92. Leptodius gracilis (Dana). 



Leptodius gracilis Rathbun, 1906, p. 848, pi. 9, fig. 2. 

 Salomon ; 1 ? ovigerous. 



93. Leptodius cavipes (Dana) (Plate 18, fig. 10). 

 Xantho (Leptodius) cavipes Alcock (3), p. 122. 

 Peros, Coin ; 2 $, 5 ?. 



94. Leptodius cristatus Borradaile (Plate 17, fig. 9). 



Leptodius (Xanthodius) cristatus Borradaile, in Gardiner, Fauna Maldives, i. pt. ill, 

 p. 252, text-fig. 51. 



Peros, Coin ; 2 f, 4 ?. Coetivy ; 1 $. 



¥ (Coin) C. 1. 5 mm., C. b. 7 '6 mm. 



There is considerable vai'iability in the depth and definition of the troughs on the legs 

 and chelipeds. The $ from Coetivy has these cavities very deep and their borders very 

 thin and sharp. 



95. Medceus simplex A. Milne Edwards. 



Medceus simplex de Man, Abh. Senckenb. naturf. Ges., xxv. Heft in, 1902, p. 603. 



Coetivy ; 1 $ juv. 



C. 1. 47 mm., C. b. 6"2 mm. Compared with $, from Hilo, Hawaii, 13'4 x 20'2mm., 

 the tooth next to the outer orbital tooth does not lie so distinctly below the antero-lateral 

 margin, the accessory denticles are proportionately smaller, the upper surface of hands and 

 wrists are more deeply pitted. 



96. Medceus ornatus Dana. 



Medceus ornatus Rathbun, 1906, p. 849, pi. 9, fig. 5. 



Saya de Malha, 55 fms., Sta. C 15 ; 1 $. Amirante, 25—80 fms., Sta. E 11; 

 11 t, 7 $ : 30 fms., Sta. E 21 ; 2 ?, 1 juv. Seychelles, 34 fms., Sta. F 8 ; 2 $, 3 ?. 



