590 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxviii. 



Of these the outer and inner ones are very short, while the three 

 central ones are of the same leng'th, which is nearly three times that 

 of the papilla". 



First antenna" short, particnlai'ly the ))asal joints; frontal plates 

 wide but not very long; lunules orhicidar, close together o!i either 

 side of the median line, i)rojecting considerabl}", and occupying nearly 

 the whole of the frontal plates. 1'he median joint has nearly the out- 

 line of an equilateral triangle, while the terminal joint is slender and 

 club-shaped. 



Second antennae stout, the terminal joint a long, sickle-shaped hook 

 attached nearly at right angles to the ])asal joint (tig. 5, p. 500), 



First and second maxilhv comparatively rudimentary, the former 

 with a slight!}' swollen base. Mouth tul)e broad, with the opening- 

 elongated transversely and denselv fringed with hairs. Mandibles 

 with a row of rounded teeth along the anterior and posterior margins j 

 for some distance back from the tip. 



Furca stout, with an accessory spine on eithei" side at the base. 

 First maxillipeds long and .slender; second pair of medium size, the | 

 basal joint much longer than the terminal, the latter consisting of a 

 stout, curved claw, with a slender spine at about the center of its 

 inner margin (tig. 12, p. 504). 



First swimming legs with a stout basal joint whose ventral surface 

 is nearly covered ]\y a broad chitin plate. From the posterior margin 

 of this plate project a slender acuminate spine at about the center and 

 a stout blunt pa]iilla at the outer corner (tigs. lo-15). 



The endopod is represented ))v a small, slightly curved spine. The 

 second jonit is long and considerably swollen at the center. 



The terminal joint carries three plumose seta» in the usual position 

 on the posterior margin, the bases of the setjt^ lieing pectinated. The 

 three terminal claws are the same length, while the seta at the corner 

 is plumose and three times as long as the claw\s. 



The second swinnning legs are not noticeable except for a row of 

 short, pectinate spines along the outer margin of the two proximal 

 joints of the endopod. The third swimming legs have a particularly 

 large and stout curved claw at the l)ase of the exopod. The fourth 

 legs are large and sti'ong for so small a copepod; the distal joint bears - 

 three long curved spines at its tij) and a smaller one u]3on its posterior 

 margin; the penultimate joint carries a single stout spine at its distal 

 end on the posterior margin. 



The rudimentary tifth legs are not visible dorsally in either male or 

 female. 



Total leng'th, 8.3 mm.; lengtli of carapace, 3 mm.; width of same, 

 3 mm. ; length of genital segment, 3 nmi, ; length of abdomen, 2.3 mm. ; 

 length of egg strings, 8 nmi. 



