NO. 1573. PA RA SI TIC COPEPODS— WILSON. 481 



and furnished with four short spines. The laminae vary considerably 

 in length, but they usually project somewhat behind the genital 

 segment. 



The egg-strings are narrow and two and a half to three times as long 

 as the whole body; the eggs are small and similar to those in the Pan- 

 darinse. The first antennae are large and appressed close to the mar- 

 gin of the carapace ; the two joints are nearly the same length, but the 

 basal has twice the diameter of the terminal; both are well armed 

 with setae. 



The second antennae are large and three-jointed, and terminate in 

 a stout curved claw, which has an accessory spine on its inner mar- 

 gin. When the antennae are turned forward these claws project 

 beyond the anterior margin of the carapace; they are prehensile in 

 function, and with the second maxillipeds are driven deeply into the 

 flesh of the host. There are no first maxillae; the second pair are close 

 beside the mouth-tube and only about one-third its length; they are 

 simple and terminate in a short, blunt spine, directed outward. 



The mouth-tube is very long and conical in shape; the base is 

 wide, but at about the level of the tips of the second maxillae it nar- 

 rows rapidly to a slender tip. The mouth-opening is terminal and 

 fringed with long hairs, through which may be seen the tips of the 

 mandibles. These are slender and toothed for some distance along 

 their inner margins at the tip; the teeth are wide and blunt, and 

 quite different from those in the Pandarinae. The first maxillipeds 

 are small and weak, the terminal joint about the same length as the 

 basal, and ending in two claws the same size and covered with stiff 

 hairs. 



The second maxillipeds are considerably larger and stouter, with 

 the terminal claw about three-quarters the length of the basal joint. 

 On the inner surface of the latter, opposite the tip of the claw, is a 

 pair of long, blunt spines; they are some distance apart and so situ- 

 ated that when the claw closes down upon the basal joint it shuts in 

 between them and is locked securely in place. All four pairs of 

 legs are biramose, the rami of the first three pairs two-jointed, of 

 the fourth pair one-jointed. In the first pair the exopod is consid- 

 erably larger than the endopod; its basal joint is three times the 

 length of the terminal and nearly twice as wide; the endopod joints 

 are about equal. In the second and third legs the basal joints are 

 enlarged and connected across the mid-line by a wdde lamina, larger 

 in the third pair than in the second. The rami of the second pair 

 are about the same size, but the joints are unequal; in the exopod 

 the basal joint is twice the size of the terminal, while in the endopod 

 the terminal joint is more than twice the size of the basal. The rami 

 of the third legs are also ef(ual and the four joints are nearly the same 

 size. In the fourth legs the basal joints are well separated and have 

 Proc. N. M. vol. xxxiii— 07 31 



