162 U.S. NATIONAL MUSEUM BULLETIN 236 



Eudactylopus andrem andrewi was recorded previously in washings 

 of dredged debris from the pearl oyster banks in the Gulf of Mannar 

 off Ceylon (Thompson and A. Scott, 1903); in washings of dredged 

 invertebrates from 13 m. depth off Pulu Jedan in the Aru Islands of the 

 Malay Archipelago (A. Scott, 1909: 2 99, 1.4 mm. length); in weed 

 washings from Nancowry Harbour in the Nicobar Islands and from 

 Addu Atoll in the Maldive Archipelago (SeweU, 1940: ad. 9, 1.28 mm.; 

 ad. cf, 0.91 mm.; 9 cop. stage V, 1.04 mm.). The present specimens 

 were obtained from washings of Caulerpa off the reef ridge at the north 

 end of Falarik in the Ifaluk Atoll. 



Eudactylopus andrewi atlanticus, new subspecies 



Dactylopus latipes T. Scott, 1894, p. 99, pi, 10 (figs. 38-43). 



Eudactylopus latipes.— Lang, 1936, p. 39. — Carvalho, 1952, p. 158, pi. 2 (figs. 63-67). 

 Eudactylopus latipes. — Lang, 1948, p. 561, fig. 227 (no. 2) (in part). 

 Eudactylopus latipes f. typica SeweU, 1940, p. 201. — Noodt 19,55, p. 59, pi. 2 

 (figs. 6-12). 



This subspecies was originally described by T. Scott from Accra on 

 the Gulf of Guinea in a shore gathering. The female, the only sex 

 described by Scott, measured 1.25 mm. Additional female specimens, 

 length 1.5 mm., were recorded by Carvalho (1952) from the bay at 

 Santos on the Atlantic coast of Brazil. Males and females have been 

 recorded by Noodt (1955) from the Sea of Marmara off Turkey. 



Eudactylopus robustus (Claus, 1863) 



Thalestris robusta Claus, 1863, p. 129, pis. 18 (figs. 17-23), 19 (fig. 1); 1866, p. 



34.— Gourret, 1889, p. 474; 1890, p. 325. 

 Plesiothalestris opima Brian, 1928, pp. 2, 36, figs. 1-12; 1928a, pp. 298, 315, fig. 16. 

 Eudactylopus robustus.— Lang, 1936, p. 36; 1948, p. 560, fig. 227 (no. 1). 

 Eudactylopus opima f. major Sewell, 1940, p. 207, fig. 34. 

 Eudactylopus opima f. minor Sewell, 1940, p. 209, fig. 35. 



For a description of this species I refer to Lang and SeweU. Sewell 

 has divided the species into a large form, f. major, 99 1.65-1,76 mm., 

 cT 1.162 mm., and a small form, f. minor, 9 0.899 mm., cf 0.866 mm. 

 The structural differences which can be derived from SeweU's descrip- 

 tions are exceedingly small and, in my opinion, on the level of normal 

 individual variability. I see no reason, therefore, to separate both 

 forms and I have sunk them into the synonymy of the nominal 

 species. This is justified even more by the fact that the differences 

 in length are not proportionally larger in this species then in many 

 other species of Harpacticoids. 



The species is well distributed through the Mediterranean: from 

 the bay of Marseilles, France (Gourret, 1889, 1890) ; from Nice, France 

 (Claus, 1863, 1866) ; from Messina, Sicily (Claus, 1863) ; from Syme 



