XlPHOCEPHALUS WlIITEI. 125 



2. Xiphocephalus Whitei, SPENCE BATE, 1862. 



The name was given by SPENCE BATE in honour of Mr. ADAM WHITE. 



PL VII, 120; and p. 24, fig. 13-17; p. 26, fig. 24; p. 28 fig. 32; p. 29, fig. 45; p. 



30, fig. 46 and 47; p. 31, fig. 48 and 49; p. 35, fig. 63 and 64; p. 40, fig. 78, 



79, 81, and 82; p. 42, fig. 83 and 85; p. 43, fig. 86; and p. 129, fig. 87. 



Diagn. The head, without the rostrum, is as long as the first six 

 personal segments together. The neck is a little longer 

 than the ocular region. The rostrum is shorter than the 

 pergeon and pleon together. 



The flagellum of the first pair of antennce in the male is two- 

 jointed. 



The seventh personal segment is not half as long as the sixth; 

 is crescent-shaped, sharp-pointed, and produced downwards. 



The epimeral of the first pair of perceopoda is obtusety crescent- 

 shaped, and projects forwards. The carpal process of the 

 first pair is smooth, without tooth on the hind margin; the 

 lower hind corner of the metacarpus is sharp-pointed. The 

 femur of the fifth and sixth pairs is narrow, not dilated. 



The pleon is dorsally carinated. 



The first ural segment is as long as, or longer than, the last 

 coalesced segment. 



The first pair of uropoda are about as long as the third; the 

 second pair are longer than the last coalesced ural segment, 

 but shorter than the third pair. The outer ramus of all the 

 three pairs is more than half as long as the inner. 



The ielson is a little longer than the last pair of uropoda, 

 and is shorter than the urus. 



COLOUR. Yellowish white. 



LENGTH. 35 75 mm. 



HAB. The Southern tropical and subtropical regions of the At- 

 lantic; the Indian Ocean; the tropical regions of the 

 Pacific. 



