THE CRUSiTACEA OF NEW JERSEY. 139 



rounded knob on front surface of second joint at end next to 

 body, and regular lobes on basal joints of last legs longer and 

 more slender than in female, also separated from joint itself at 

 heel as well as at toe. 



The colors are quite striking and I cannot do better than to 

 quote from Wilson, whose account quite agrees with my 

 example : "This is a very clean-looking Argulus, and by far 

 the most beautiful of any American species. It is a veritable 

 Joseph among its brethren in the colors of its coat. The chitin 

 framework and the spines on the ventral surface are a clear 

 orange, the longitudinal ribs of the carapace having the orange 

 bordered by yellow-green. The digestive tube is a deep 

 wine red anteriorly, fading into yellow-green in the abdomen. 

 The testes and semen receptacles are a still deeper red, almost 

 purple. The ground color of the body is a yellow-green, this 

 color forming a wide border around the edge of the carapace 

 and extending inward diagonally as a wide band on either side 

 from the edge just behind the sucking disks to the base of the 

 posterior sinus. From the center of these diagonal bands an- 

 other narrower band of the same color extends backward parallel 

 with the edge of the carapace to near the posterior border of 

 the lobes. At about their center these last bands are joined 

 with the border along the edge by radial bands. In addition 

 to these bands there are areas of the same color just outside 

 the sucking disks and a large one in either lobe opposite the 

 base of the first swimming legs. The rest of the surface is 

 filled in with orange-yellow of various shades, the posterior 

 part of the lobes being tinged with brown, while over the side 

 branches of the stomach it takes more or less of a reddish hue 

 from the stomach contents. As may w^ell be imagined, the whole 

 presents a beautiful variegated appearance, whence the name 

 given to the species. But the most wonderful thing about these 

 beautiful colors is their permanency. They are "fast" colors 

 in the fullest sense of the word, for they defy any preservative 

 so far tried. Chrome-acetic and corrosive-acetic. Perenyi's and 

 platinum chloride have no effect upon them, and after preserva- 

 tion in these solutions they have been kept in alcohol for over 



