500 PROCEEDINGS OF THE NATIONAL MUSEUM vol.88 



A. latus has been taken in surface tows at Vineyard Sound, Mass., 

 in a brackish pond on Chappaquiddick Island, Mass., and in Casco 

 Bay, Maine. 



A. funduli was described from specimens taken on Fundulus ocel- 

 laris near New Orleans, La. ; others from many fish at Waquott Hole 

 and Woods Hole, Mass., and Long Island Sound; from Fundulus 

 majalis at Beaufort, N. C. ; FuTidulus heteroclitus^ St. Andrews, New 

 Brunswick; a brackish pool atMeveitta, Fla. ; on Menidia notata and 

 Pseudopleuronectes araericanus from the Passamaquoddy region; 

 and on Lagodon rhoniboides from the Gulf of Mexico. The females 

 measure to 5 mm. and the males to 4 mm. 



ARGULUS VIOLACEUS Thomsen 

 FiGUEE 36 



Argulus violaceus Thomsen, 1925, p. 185, figs. 1-15. 



Carapace elliptical, covering second appendages on female and 

 reaching third ones on male; posterior sinus broad, eyes widely 

 separated; cephalic area prominent and sinuses deep. Abdomen of 

 male subtriangular, with broadest portion near anterior end ; almost 

 rectangular on female, with narrow neck attached to thorax; sinus 

 broad, uniform in width, anal furcae basal, rounded. The testes 

 extend almost the full length of the abdomen. 



Antennae arranged to accommodate them to the narrowness of the 

 cephalic area. The lateral hook is pushed forward and bends back 

 very far ; anterior hook pushed mesially, very broad at base and long 

 with a minute hook. A large spine located on the ventral surface 

 of the lateral hook, spine at base of second antenna long and blunt, 

 that at base of the first is broader and those near the midline very 

 broad and blunt. Second antennae extending to the edge of the 

 carapace. 



Suction cups small and widely separated. Him narrow with ribs 

 composed of a somewhat J -shaped basal rod and an oblong distal 

 one, marginal lappets blunt and rounded (fig. 36, a). Second maxil- 

 lae slender, basal plate with three broad rounded lobes, and both 

 pairs of spines near the midline rounded with spinous pads on them. 

 Anterior respiratory area subtriangular located near suction cups, 

 with the posterior one extending to the end of the alae (fig. 36, h). 



Thoracic appendages with flagella, very stout and short on the 

 female; thorax slightly widened between third and fourth pairs; on 

 the male the coxa is slightly broader than the width of the second 

 appendage. The third appendages are peculiar in that the basal 



