NO. 2063. NORTE AMERICAN PARASITIC COPEPODS— WILSON. 637 



on a level with the dorsal surface. These are narrowed into a slender 

 neck where they join the abdomen, then swell suddenly into a plump, 

 somewhat flattened cylmder which is short and pointed at the tip and 

 is turned forward along the dorsal surface of the body. 



The appendages are similar to those of the female, except that both 

 the second maxillae and maxillipeds are chelate, the terminal claw 

 shutting against a curved spine or process on the inner margin of the 

 second joint. 



Color, a uniform yellowish-white. 



Total length, 2.15 mm. Greatest diameter, 0.65 mm. 



(galei, from the generic name of the most common host.) 



EeTnarks. — This male is one of the largest in the entire family and it 

 seems to prefer to attach itself to the body of the female at the ante- 

 rior end and just behind the cephalothorax instead of at the posterior 

 end. Scott reports this species as found in company with hidiscalls 

 upon the male tope, Galeus canis. The present species adhered to the 

 skin beneath and between the ventral fins, while hidiscalis was found 

 adhering to the ends of the claspers. 



LERNAEOPODA ELONGATA (Grant). 



Plate 39, fig. 98. 



Lernaea elongata Grant, 1827, p. 147, pi. 2, fig. 5. 



Leniaeopoda elongata Kr0yer, 1837, p. 259, pi. 2, fig. 12. — Baird, 1850, p. 333, 

 pi. 35, fig. 5.— T. Scott, 1900, p. 171, pi. 8, figs. 11 to 15. 



Host and record of specimens. — Three fine females, two of which have 

 attached males, are numbered 12037, U.S.N.M., but there is no record 

 of the host or locality. Another female was obtained in Greenland 

 by N. P. Scudder and is numbered 39574, U.S.N.M. No host is given 

 for this specimen, but as it was ob tamed from the fishermen off the 

 coast it was probably taken from a shark. All four of these females 

 have unbroken egg strings. 



Specific characters of female. — Cephalothorax small, ovoid, flattened 

 dorso-ventrally, and inclined at right angles to the trunk axis. First 

 two segments of the tnmk distinctly differentiated, the others merely 

 indicated by surface grooves; trunk cylindrical, more or less strongly 

 flattened dorso-ventrally, two or three times as long as wide, with a 

 row of pits or depressions along either side of the dorsal midline; the 

 posterior end with prominent well-rounded corners, and in the center 

 between the bases of the egg strings and on a level with the ventral 

 surface two short knoblike posterior processes. Egg strings consid- 

 erably longer than the body, slender, and cylindrical-, eggs minute, 

 arranged in 20 to 30 longitudinal rows, about 100 eggs in a row. 



First antennae four-jointed, rather slender; second pair with a tiny 

 exopod inserted on the side of the endopod, the former tipped with 



