232 U.S. NATIONAL MUSEUM BULLETIN 236 



Legs 2 to 4 (figs. 91b-d) with the following setal formula: 



endopodite exopodite 



leg 2 1. (modified) 0.1.123 



leg 3 0.1.221 0.1.123 



leg 4 1.1.121 0.1.223 



Endopodite of leg 2 modified, internal seta on segment 1 small. 

 Segment 2 with finely tapering point, external margin with big, articu- 

 lating spine; internal margin with 3 setae (fig. 916). 



Endopodite of leg 3 without seta at internal margin of 1st segment, 

 but this seta may have been removed by dissection. Whole endopo- 

 dite, but especially 3rd segment, lengthened, longer than exopodite; 

 setae on 3rd segment strong (fig. 91c). 



Baso-endopodites of leg 5 of both sides touching; exopodite small, 

 shorter than baso-endopodite, with total of 6 setae, distribution of 

 which can best be seen from figures 90g, 91e. Baso-endopodite with 2 

 strong apical spines, haired at apex, and spinulose external border. 

 Color, as in female, completely faded. 



Remakks. — The distribution of this species has been discussed by 

 Lang (1948). It has been recorded from Banyuls-sur-Mer on the 

 Mediterranean coast of France (Monard, 1928, as Amphiascus 

 ctenophorus); from Port Said, Egypt (Gurney, 1927); and from 

 Harrington Sound in the Bermuda Islands (Willey, 1935). From the 

 Indo-Pacific area it has been recorded from Nancowry Harbour in the 

 Nicobar Islands and from Addu Atoll in the Maklive Archipelago, in 

 both localities from weed washings, the females measuring 0.70 mm. 

 (Sewell, 1940). In the Ifaluk collection the species occurs in a sand 

 sample taken 340 feet from the reef margin on Falarik in the Ifaluk 

 AtoU. 



Genus Amphiascoides Nicholls, 1941 



I have pointed out earlier (p. 193) that Lang's genus Amphiascella 

 must be dropped in favor of Nicholls' genus Amphiascoides. The 

 type species is Dactylopus debilis Giesbrecht, 1881. The following 

 species are known : 



Females Males 



Dactylopus brevifurca Czerniavski, 1868 D. brevifurca Czerniavski, 1868 

 D. debilis Giesbrecht, 1881 D. debilis Giesbrecht, 1881 



Stenhelia dispar T. and A. Scott, 1894 S. dispar T. and A. Scott, 1894 

 S. limicola Brady, 1899 

 Dactylopus littoralis T. Scott, 1903 



S. neglecta Norman and T. Scott, 1905 S. neglecta Norman and T. Scott, 1905 

 Amphiascus nanus G. O. Sars, 1906 

 A. nanoides G. O. Sars, 1911 

 A. proximus T. Scott, 1914 

 A. sterilis Monard, 1926 



A, subdebilis Willey, 1935 A. subdebilis Willey, 1935 



A. calcarifer Sewell, 1940 A. calcarifer Sewell, 1940 



