P E N M I D E A. 607 



Stenopus btspidus, Latr. 

 Plate 40, fig. 8, animal, natural size (from Karaka). 



Coral reef of Raraka, one of the Paumotu Islands ; also, Balabac 

 Passage, north of Borneo. 



Length, three inches. Body, colourless, excepting bright crim- 

 son in the head, and in two broad bands across the abdomen, one 

 covering the greater part of the second and third segments, and the 

 other in the penult segment ; also, scarlet crimson in four broad spots 

 across the third pair of legs, one of which is at the base of the fingers ; 

 antennae, white, and placed widespread, as in the figure, when the 

 animal is swimming, one of the long branches of the inner pair being 

 directed nearly upward, the other branch, forward, while the outer 

 pair is directed outward. Outer antennae two and a half times as 

 long as the body. Basal scale of outer antennae twice as long as base 

 of inner. The legs of the first and second pairs, and of the fourth and 

 fifth are colourless; and they are extremely slender, much more so 

 than in the drawings hitherto given of the hispidus; the third pair is 

 about one-fourth longer than the body, fourth joint of second pair 

 nearly twice as long as hand; fourth joint of fourth pair, twelve- 

 jointed; and fifth joint, seven-jointed; tarsus minute. 



The loss of the Raraka specimens, from which the drawing was 

 taken, prevents our making a direct comparison between the Balabac 

 specimens and those of the Paumotu Archipelago. 



Seba, Mus., iii. pi. 21, f. 6, 7. 



Stenopus hispidus, Latreille, Regne An. de Cuv. [2], iv. 93; Edwards, Crust., ii. 

 407, and Cuv. Must., pi. 50, f. 2; A. White, Crust, of the Samarang, p. 61, pi. 12, 

 f. 6. 



Stenopus ensiferus. 



Carapax partim Icevis, 2-3 sulcis obliquis intersecatus, uno validiore 

 e dorsi medio fere ad angulum antero-lateralem producto et rnargine 

 spinuloso, super ficie carapacis antero-laterali spinulis armatd; rostro 

 ensiformi, paulo longiore quam basis antennarum internarum, fere 



