NO. 2063. NORTH AMERICAN PARASITIC C0PEP0D8— WILSON. 641 



LERNAEOPODINA LONGIBRACHIA (Brian). 



Lernaeopoda longibrachia Brian, 1912, p. 39, pi. 2, fig. 5; pi. 12, figs. 1-12. 



Host and record of specimens. — ^There is in the collection of the 

 United States National Museum a single female of this species, 

 which is numbered 6087, U.S.N.M., but unfortunately all record of 

 host and locahty has been lost. 



Specific characters of female. — Brian has given a good description 

 and figures of this species, and we may repeat briefly the principal 

 characters. Cephalothorax comparatively small, one-fifth the length 

 and one-fourth the width of the trunk, obovate, covered with a dis- 

 tinct dorsal carapace, and well separated from the trunk; neck short 

 and without grooves; trunk pear-shaped, increasing in diameter from 

 the narrow neck backward, plumply roimded and smooth. A small 

 and degenerate abdomen between the posterior processes; the latter 

 cylindrical, half as long as the trunk, and contracted into a narrow 

 pedicel where they join the thorax. Egg strings cylindrical, half the 

 diameter of the body, and four-fifths as long; eggs small, in 10 or 12 

 longitudinal rows, about 45 in a row. First antennae four-jointed; 

 second antennae biramose, the endopod (dorsal) somewhat larger 

 than the exopod (ventral), neither of them jointed. First maxillae 

 minute, without a palp and tipped with two setae; second maxillae 

 filiform, of the same diameter throughout, and from two and a half 

 to five times the combined length of the cephalothorax, trunk, and 

 posterior appendages. MaxiUipeds rather slender, with a stout spine 

 on the basal joint near the distal end, and an accessory spine on the 

 inner margin of the terminal claw near its tip. 



Color (preserved material), a light brownish-yellow. 



Total length (without posterior processes), 11 mm. Length of 

 posterior processes, 3 mm. ; of egg strings, 1 1 mm. ; of second max- 

 illae, 55 mm. Greatest width of trunk, 5 mm. 



(longihracMa, long-armed, alluding to the second maxillae.) 



RemarTcs. — The distinguishing character of this species is the re- 

 markably long and slender second maxillae, which, as Brian has 

 stated, give the parasite the appearance of a tiny pear suspended by 

 two long threads. No other copepod is known in which the attach- 

 ment organs reach such a proportionate length. 



LERNAEOPODINA RELATA, new species. 

 Plate 25, fig. D; plate 39, figs. 99 to 101; plate 40, figs. 102 to 105. 



Host and record of specimens. — About one hundi-ed specimens of 



both sexes were obtained from the giUs of a large barndoor skate, 



Raja levis, at HarpsweU, Maine, August 15, 1913. A single female 



with an attached male is made the type of the n,ew species and is 



34843°— Proc.N.M.vol.47— 14 41 



