ART. 17. AMERICAN PARASITIC COPEPODS — WILSON. 11 



exopod, — 1, 6 — 3; third endopod, 1 — 0, 6 — 0; third exopod, — 0, 

 5 — 4; fourth endopod, 1 — 0, 5 — 0; fourth exopod, 1 — 1, 4 — 4. 



Eeanarks. — This new genus is closely related to Pandaras as has 

 been indicated in its name. It diifers, however, in the size, shape, and 

 arrangement of the dorsal plates on the free thorax, in the greater 

 development of the second antenae, in the entire absence of adhesion 

 pads, and in the relative size of the sixth segment and abdomen in 

 the female. The male differs in the knobs on the lateral margins of 

 the fourth segment and at the anterior corners of the genital seg- 

 ment, and in the great enlargement of the anal laminae. The body, 

 the plates, and the appendages are softer than those of Pandarus 

 and easily become inflated in the preservative. 



NEW HOSTS AND NEW LOCALITIES. 



ARGULUS ALOSAE Gould. Four lots of this species were taken from tomcod, 

 Microgadus tomcod, in Bass River, Nova Scotia July 27, 1921. After identifica- 

 tion they were returned to the Commissioner of Dominion Fisheries at Ottawa, 

 Canada. 



ARGULTTS LATICAUDA Smith. Twelve specimens, including both sexes, were 

 taken from the toadfish, Opsanus tan, at Woods Hole August 4, 1908. They 

 have receive<l Cat. No. 54104. U.S.N.M. 



ARGXTLTTS PITGETTENSIS Dana. Four females were taken by the Fisheries 

 steamer " Albatross " from the viviparous perch, Cymatogaster aggregatus, off 

 the coast of California in the summer of 1915, and have received Cat. No. 

 53496, U.S.N.M. Two lots, including both sexes, were obtained from the wall- 

 eyed surfllsh, Hyperprosopon argenteus, on the Pacific coast by J. R. Beck. 

 They have been given Cat. Nos. 53532 and 53533 U.S.N.M. respectively. 



ARGULTrS STIZOSTETHH Kellicott. Twelve females and two males were 

 taken from the Muscalunge, Esox noMlior, in Squirrel Lake, Vilas County, 

 Wis., July 20, 1907. One female and one male have been deposited in the 

 National Museum with Cat. No. 49797, U.S.N.M. 



CALIGUS RAPAX Milne Edwards. A single female was found in the mouth 

 of a striped sea robin, Prinotus striatus by V. N. Edwards at Woods Hole May 

 14, 1913, and has been given Cat. No. 54105, U.S.N.M. 



CALIGUS THYMNI Dana. Two females were taken from the gills of a 

 swordfish, Xyphias gladins, at V>^oods Hole, July 14, 1911, by Dr. Edwin Linton. 

 They have received Cat. No. 54103, U.S.N.M. 



LEPEOPHTHEIRUS EDWARDSI Wilson. Two males were taken from the 

 cills of the goosefish, Lopliiiis piscatorius at Woods Hole, May 25, 1914, by 

 V. N. Edwards, and liave been given Cat. No. 54106, U.S.N.M. 



lEPEOPHTHEIRTIS PARVIVENTRIS Wilson. Two females were taken from 

 a kelpfish, Iridio mmicinctus, on the coast of southern California and have 

 received Cat. No. 53492, U.S.N.M. Three females were taken from a sting 

 ray, Urolophus halleri, by Prof. A. B. Ulrey in an aquarium at the marine 

 station of the University of Southern California, at Venice, California, July, 

 1919, and have received Cat. No. 53553, U.S.N.M. 



ALEBION GRACILIS Wilson. A single female was taken from the skin of 

 Milbert's shark, Carcharhinus milberti, at Woods Hole, August 5, 1922, by 

 Dr. H. M. Smith. It has received Cat. No. 54141, U.S.N.M., and is the first 

 specimen of this sepcies to be recorded from this host. 



