s 



28 



and wholly co ver e cl (save the fingers of the chelipeds) with a den se fur 

 of sim il ar hairs as are found on the later al sides of the cara p ace. All the 

 legs are only i 1 /* times the breadth of the carapace, with exception of the posterior pair, that 

 is somewhat shorter than the preceding pairs. The short meropodite of the chelipeds is three- 

 faced, with rather sharp borders, but wholly unarmed; the wrist has a rounded inner angle; 

 the palm is much inflated, smooth, with the horizontal length exceeding the height and also 

 longer than the fingers ; the latter are of a white colour, with the greater part naked, but 

 provided with some ordinary, slender hairs, gaping at base and meeting at tip, which is acute, 

 not spooned; the fixed finger has a very small tooth quite near the base of the inner margin 

 and beyond this some minute serrations; the mobile finger is serrated in the same way, very 

 high at the base, but tapering to tip, and the inner margin has a quadrangular tooth at about 

 Yj of the distance between the base of the inner margin to the tip of the finger (fig. 5^). 



The stout walking legs differ little in length, only the last pair is distinctly shorter than 

 the preceding pairs and about iY s times the breadth of the carapace, the penultimate pair 

 measuring iY 2 times this breadth. They are wholly covered with hairs, even to the tip of the 

 dactyli, that are straight, pointed and longest in the case of the second pair of ambulatory 

 legs, where they equal the preceding joint in length. All the joints are completely unarmed; 

 the meropodites are 3 times as long as broad, somewhat narrowing distally. 



Dimensions in mm. : 



Length of carapace (seen from above and not including the rostrum) . 2.8 



Breadth of carapace 3.3 



Length of carapace ■ 4.9 



Length of meropodite / 1.9 



Breadth of meropodite I l 0.6 



Length of propodite 1 of penultimate pair of legs J 1.0 



Breadth of propodite in the middle 1 I 0.4 



Length of dactylus | 0.8 



Length of posterior pair of legs 4.5 



Horizontal length of chela 2.1 



Height of palm 1.0 



Length of mobile finger 0.9 



The original habitat of this species is New Caledonia, in brackish water. The "Siboga"- 

 Expedition found it on the coral reefs, at Sangir, north of Celebes. 



Species incertae sedis: 



Hymenosoma gaudichaudii Guérin. Voy. "Coquille", 1828, pi. 2, f. 12, and H. MlLNE-EüWARDS, 



Ann. Sc. Nat. (3) t. 20, 1853, p. 222. 

 Hymenosoma laeve Targioni-Tozzetti. Viag. "Magenta", Crost., 1877, p. 177, pi. 11, f. 3. 



2S 



