346 PROCEEDINGS OF THE NATIONAL MUSEUM vol. xog 



ochotensis. Parhyale zibellina described by Derjavin (1937, p. 109) 

 from the Soviet coast of the Sea of Japan appears to belong to the 

 genus Parallorchestes . 



The genus Hyaloides created by Schellenberg (1939, p. 126) for 

 specimens from Banana, Belgian Congo, differs from Parhyale only 

 by the lobe of the fifth joint of the second gnathopod of the male. 

 As this lobe is present only in the males of Parhyale fascigera and P. 

 hawaiensis which are not fully mature, and is entirely lost in the 

 fuU}^ mature males, Hyaloides becomes a synonym of Parhyale. This 

 lobe is present also in the not fully mature males of many species of 

 Hyale, but is lost by full maturity. 



The following combination of characters separates Parhyale from 

 Hyale: Antenna 1 reaching well beyond the peduncle of antenna 2; 

 antenna 2 rather long with many-jointed flagellum; maxilliped with a 

 dense brush of spines or setae at the apex of the third joint of the 

 palp. Uropod 3 with small inner ramus; telson cleft to base; seventh 

 joint of all peraeopods short, curved only at the nail, and bearing a 

 stout seta on inner margin. The female is like the male except in the 

 gnathopods, which are slender and weaker. 



Up to the present time two species of Parhyale have been described, 

 P. fascigera Stebbing and P. hawaiensis (Dana). They are widely dis- 

 tributed in the warmer waters of the bays and estuaries of the globe, 

 and have been described at times as species of Hyale. 



Parhyale fascigera Stebbing 



Figures 1, 2,a-f 



Parhyale fasciger Stebbing 1897, p. 26, pi. 6. 

 Parhyale fascigera Stebbing 1906, p. 556. 

 Hyale hrevipes Shoemaker 1933, p. 18, figs. 10, 11. 

 Hyale hawaiensis Shoemaker 1942, p. 18. 



Stebbing's description and figures are good, though they appear to 

 be of somewhat smaller specimens than have been used for the present 

 description and figures. 



Male: Head nearly as long as the first two body segments com- 

 bined. Eye more or less pyriform, and dark brown in alcohol. Anten- 

 na 1 : Reaching well beyond the peduncle of antenna 2 ; flagellum much 

 longer than peduncle and composed of from 11 to 15 joints. Antenna 

 2: Nearly half as long as the body; fourth and fifth peduncular joints 

 nearly equal in length ; flagellum about twice as long as the peduncle 

 and composed of from 15 to 24 joints. 



Mandible with well-developed molar and toothed cutting edge; 

 spine-row of five or six spines and several plumose setae. Maxilla 1 : 

 With rather slender inner plate bearing two apical plumose setae; 



