Ho.idas. r.\crrrc coast corEronR—wiLS<>\. 439 



pair of rudimentary legs, and by the structure and nit ad unci it of the 

 second maxillipeds. They do not have a very strong hold od the gill 

 filaments, lait arc easily removed without taking any of the tissues 

 with them. On being placed in an aquarium they lie helplessly upon 

 their hacks, writhing about violently, hut unable to move from the 

 place where they are put. The single thorax joint is very pliable and 

 allows o T eat freedom of motion in every direction. The head can be 

 bent over forward, backward, or even sidewise until it touches the 

 genital portion. The sidewise movement is practiced more frequently 

 than the others, and specimens usually die and remain out of shape 

 in this direction unless straightened just after death. The mouth 

 parts, particularly the maxilla? and maxillipeds. are also capable of 

 considerable motion, and the horn on either side of the head can hi' 

 moved within restricted limit-. The lower lip is apparently rigid. 



Family CALK J I IKK 



Siabf&mily < .VLIGIN.i;. 

 CALIGUS GURNARDI Kroyer. 



Calif/us gumardi Krotee, 1863, p. ~n, pi. ti, iiu r s. :; a t<> g. 

 Host and record of specimens. — One lot obtained by the steamer 

 Albatross May 29, 1904, from a king salmon. Oncorhynchus tscha- 

 wytscha, at Monterey, California: Cat. No. 38562, U.S.N.M. A sin- 

 gle female was obtained by Doctor McClendon from the elephant fish 

 Hydrolagus colliei at La Jolla, California; Cat. No. :i8579, U.S.N.M. 



LEPEOPTHEIRUS NORDMANNII Milne Edwards. 



Lepeophtheirus nordmannii Milne Edwards, 1840, i>. 155. 

 Host and record of specimens. -A lot consisting of ten females and 

 fifteen males was obtained by the steamer Albatross March 31, L904, 

 from a suniish. Mola mola, oil' Santa Catalina [sland : Cat. No. :;s: ) <;; , ) . 

 L.s.N.M. In this lot was found a chalimus of the species attached to 

 one of the males: these two have been separated and are Cat. No. 

 385C.L L.S.N.M. 



LEPEOPHTHEIRUS PARVIVENTRIS Wilson. 



Lepeophtheirus parviventris Wilson, 1905, p. 635, pi. win. figs. 275 to 284. 



Host nntl record of specinn ns. Five females were obtained by the 

 steamer Albatross from the Spanish flag, Sebastodes rubrivinctus, <'>', 

 mile- northwest of Santa Barbara [sland, in L904; Cat. N<». 38566, 

 L.S.N.M. 



Twenty females and one male were obtained by the same steamer 

 from the atka fish. Pleurogrammus monopterygius, at Agattu, 

 Alaska, dune 7. L906, and are Cat. No. 38582, L.S.N.M. 



Several lots had been previously obtained by the same steamer in 

 1888 from the northern Pacific, and were recorded in the reference 



