wo.1653. PACIFIC C0A81 C0PEP0D6 \\li.s<,\. A ~] 



bases of the second maxillipeds, triangular, one-eighth Longer than 

 wide and rather pointed ;it the tip in dorsal view. Second maxilli- 

 peds stout, cylindrical, and only half as long as the body; bulla mush- 

 room-shaped and twice the diameter of the maxillipeds, with a long 

 and slender petiole. Genital portion nearly circular in outline in 

 dorsal view, hnt only one-half wider than the head, with no trace <»!' 

 segmentation. Egg strings one-fourth the diameter of the genital 

 portion and one-third longer than the entire body. Eggs of medium 

 size and arranged in five or six longitudinal rows. 



First antennae in the form of shorl unsegmented processes, nar- 

 rowed at the tip and armed with a single small spine. Second pair 

 flattened laterally, imperfectly segmented, and split at the tip into 

 two rami; the dorsal ramus is the smaller and is tipped with a coni- 

 cal-process and a small -pine. The ventral ramus is armed with a 

 large spine, a -mall one close to it. and a rounded knob covered with 

 -mall -pine-. The mandibles are longer and narrower than in gib 

 l>ii-; they have the same number of teeth, bul these are considerably 

 different in pattern. 



The maxillae are also longer ami narrower than in the preceding 

 species, and are armed at their tip with a short, -tout -pine on either 

 side and a central conical process or palp, which carries at it- tip 

 two -hort spines. 



The first maxillipeds are removed from the month tube a dis- 

 tance nearly equal to their own length. Their basal joints are stout 

 and swollen, Inn the terminal ones are -lender and weak, the claw 

 being abruptly narrowed near it- base. 



Total Length, 1.6 mm. Length of head. •_' nun.: of genital portion, 

 •_'.<'> nun.: of second maxillipeds, without the bulla, •_'. I mm.; of the 

 egg strings, 6 mm. Width of head. L.5 nun.: of genital portion. 

 2.85 mm. 



Color, (preserved material) a light straw yellow deepening to 

 orange over the ovaries in the genital portion: India and it- stem 

 yellowish brown. Eggs at first light yellow, afterwards becoming 

 orange. 



[beani, to Dr. Tarleton II. Bean, who ha- accomplished excellent 

 results in the investigations of the salmon industries of the Pacific 

 coast . > 



The label accompanying the type- of this new species states that 

 they were taken from a female fish that died of the disease prevail 

 ing among the salmon in the McCloud River during the summer of 

 1881. The species can he distinguished' by the comparative Length of 

 the second maxillipeds, by the size and shape of the bulla, and the 

 fact that it possesses a distinct -talk, and by the distance between the 

 first maxillipeds and the other month part-. Without exception, 

 also, these parasites were attached to the tip- of the gill filaments, 

 while L. gibbi r attache- itself to the gill arches. 



