76 U.S. NATIONAL MUSEUM BULLETIN 2 36 



ing, broader than long in proportion of 3:2, with 5 marginal setae 

 and 1 appendicular seta each. Setae 4, 5, and appendicular seta short, 

 seta 1 of intermediate length. Setae 2 and 3 lengthened and thickened, 

 2nd reaching ji body length and slightly swollen basally; seta 3 

 shghtly shorter. 



Antennules extremely short, 6-segmented; 4th segment, though 

 provided with an aesthetasc, not larger than preceding segment and 

 ^vithout conical process; segment 6 cylindrical, rather long (fig. 23/). 



My preparation of the antenna and mouth parts of this small speci- 

 men was unsuccessful, with the result that I cannot describe these 

 parts in detail here. 



Leg 1 with 3-segmented exopodite and 2-segmented endopodite; 

 the setation follows from the setal formula and figure 23a. 1st endop- 

 odal segment longer than whole exopodite. Internal seta inserting at 

 Yz internal margin from base; 2nd endopodal segment small, with 3 

 setae. Coronula of spinules on basis and one at base of 1st endopodal 

 segment. Exopodites and endopodites of legs 2 to 4, 3-segmented 

 (figs. 23b-d). Setal formula: 



Leg 5 (fig. 23e) comparatively big for such a small species. There is 

 a strong seta on the external lobe of the baso-endopodite and 2 setae 

 on the baso-endopodite itself; it reaches % the length of the exopodite. 

 There are 3 marginal setae on the exopodite, each placed on a distinct 

 socle. In addition, there is a fine seta on the exopodite, attached to 

 the internal surface (fig. 23e). 



Color completely faded, transparently greenish. No eyespot 

 visible. 



The specimen carries 4 big eggs closely applied to the abdomen. 



Remarks. — Halophytophilus fusiformis is well distributed through 

 the Mediterranean: Banyuls-sur-Mer, France (Monard,1928); Genoa, 

 Italy (Brian, 1917, 1918, 1921); Rovinj, Yugoslavia, on the Adriatic 

 (Brian, 1923); Astypalaia and Telos Islands in the Aegean (Brian, 

 1928); Tunisia (Monard, 1935); and Algeria (Monard, 1937). This 

 is the first record of the species outside the Mediterranean; as in 

 previous habitats it occurred on algae and was obtained in washings 

 of Caulerpa, etc. 



Family Harpacticidae G. O. Sars, 1904 



This family, at the suggestion of Lang (1948, pp. 309, 346) can be 

 divided into two subfamilies with the following genera: 



