304 U.S. NATIONAL MUSEUM BULLETIN 236 



The nomenclature of its only genus, Lourinia C. B. Wilson, 1924, 

 is slightly complicated, but there can be no doubt, as may appear 

 from the following argument, that its proper name should be what is 

 given here. The type species of the genus was described originally 

 by Claus (1866, p. 24) as Jurinia armata and independently by 

 Thompson and A. Scott (1903, p. 265) as Ceylonia aculeata. Both 

 species are congeneric and, in the opinion of most copepodologists, 

 also identical; both generic names are preoccupied, as was recognized 

 by Wilson (1924, pp. 14, 15); since he failed to notice the fact that 

 Jurinia and Ceylonia are congeneric, he substituted a new generic 

 name for both, Ceyloniella for Ceylonia (p. 14) and Lourinia for 

 Jurinia (p. 15). Although Ceyloniella has distinct page priority 

 over Lourinia, the proper name, according to the International 

 Kules of Zoological Nomenclature (cf. Follett, 1955, p. 37), is that 

 used by the first reviser (i.e., Monard, 1927, p. 173); the type species, 

 consequently, must be named Lourinia armata (Claus, 1866). Speci- 

 mens occur in the Ifaluk collection that, although slightly different 

 in setal formulae from previously described specimens, must in my 

 opinion be brought to that species. A second species recently has 

 been added to Lourinia by Sewell (1940, p. 332) as Ceyloniella 

 nicobarica; of this new species an unnamed variety also was described. 

 The characters separating this new species from the variable Lourinia 

 armata are not particularly impressive. 



Genus Lourinia Wilson, 1924 

 Lourinia armata (Claus, 1866) 



Figures 120, 121b-d, 122-124 



Jurinia armata Claus, 1866, p. 25, pi. 2 (figs. 15-24). 



Ceylonia aculeata Thompson and A. Scott, 1903, p. 265, pi. 7 (figs. 11-23). 



Ceylonia aculeata var. adriatica Brian, 1923, p. 130 (nomen nudum). 



Ceyloniella aculeata var. adriatica Brian, 1928, p. 23, figs. 100-104. 



Ceylonia armata. — V^tova, 1928, p. 183. 



Ceyloniella armata.— SeweW, 1940, pp. 124, 125, 127, 130, 300, 363, 366, 367, 368, 



375. 

 Ceyloniella armata f. major Sewell, 1940, p. 329, figs. 77, 78. 

 Ceyloniella armata f. minor Sewell, 1940, p. 331, fig. 79. 

 Lourinia armata.— Lang, 1948, p. 1215, fig. 490.— Noodt, 1955a, p. 212, fig. 24.— 



Petkovski, 1955a, p. 100, fig. 70. 

 Lourinia armata svlamericana Jakobi, 1954a, p. 192, pi. 3. 



Material. — ^Loc. 592, 1 ad. 9, 0.99 mm.; 1 ad. cf , 0.87 mm. 



Description. — The following is based on the above-mentioned 

 specimens; both have been dissected. 



General shape of body slender, cylindrical, with fairly well-marked 

 division between cephalothorax and abdomen, greatest diameter at 



