on its arcuate outer margin, while the tapering, multiarticulate flagellum is a little shorter 

 than that of the other pairs (PI. II, fig. 5^), but presents for the rest just the same form, so 

 that it is not "short and stiff" as described by Alcock. 



The epistome is distinctly grooved in the middle line up to the acute, median spine of 

 the anterior margin; this spine is obliquely directed forward and downward, while on either 

 side at some distance from the outer angle another smaller spine occurs. 



In adult specimens, both of the male and of the female, the legs of the i st pair are a 

 little longer than the carapace, so in a male, long 145 mm., these legs measure 60 mm., 

 while the carapace is 53 mm. long; in the female, long 175 mm., the legs of the i st pair are 

 66 mm. long, the carapace 60 mm. In Alcock's specimens these legs measured about 7 / s the 

 length of the carapace. The following legs regularly increase in length and, though not so 

 regularly, decrease in thickness. In the male, long 145 mm., the legs of the 5 th pair measure 

 115 mm., being more than twice as long as the carapace, and these legs extend by the dactyli 

 and somewhat more than one-third their propodi beyond the antennal peduncle ; in the female, 

 long 175 mm., the 5* legs, that measure 110 mm., are not yet twice as long as the carapace 

 (60 mm.),' they are even a little shorter than those of the 4 th pair and, when stretched forward, 

 reach only the middle of the dactyli of these legs. The legs of the 5 th pair are namely cheli- 

 form in the female. The last joint is much shorter than the dactylus of the 4 lh pair, measuring 

 1 L the length of the propodus between both articulations; it carries below a curved tooth that 

 is grooved on its lower surface and that forms with a process, just as long, of the propodus 

 a perfect chela, beyond which the distal extremity of the modified dactylus extends dorsally. 



The largest egg-laden female is 175 mm. long, the smallest specimen, provided with eggs, 

 measures 134 mm. The very numerous, globular ova are of a small size, 0,85 — 0,9 mm. thick. 



The measurements of the carapace, the abdomen and the telson, measured in the middle 

 line, are the following: 



Stat. 38. Males: 47, 87, 26; 46, 87, 25; 40, 76, 23; 40, 75, 23; 38, 72, 21 ; 37, 70, 22; 

 35, 6 7, 2 °; 33, 6i, 19; 32, 60, 19; 31, 57, 18. 

 Females: 61, 113, 33; 60, 115, 33; 60, 112, 34; 56, 113, 32; 56, 108, 32; 56, 108, 32; 

 53,102,30; 46,88,27; 45,85,26; 44,82,25; 42, 7S, 23; 1S 1 /.,, 33 1 /,, 11 1 /.,. 

 Stat. 297. Males: 53, 92, 27; 49, 85, 25; 43, 76, 23. 

 Females: 42, 80, 24; 3S7 3 , 7 1 , 2I V-r 



General distribution: Eastern Pacific, North of New Guinea (Spence Bate); Gulf 

 of Manar and the Arabian Sea off the Travancore Coast (Alcock). 



Panulirus White. 



The genus Panulirus, established in 1847 by White, contains those species of Palinuridae, 

 of which the carapace presents no rostrum, in which the pleopods of the 2 ,ld abdominal somite 

 of the female differ greatly from the following pairs and the antennular flagella of which are 

 very long. It is nowadays represented by 1 7 species, 3 of which, however, Panul. bispinosus 

 Borr., Panul. marginatus (Quoy and Gaimard) and Panul. sf>iuosus (H. M.-Edw.), are doubtful, 



