THE CRUSTACEA OF NEW JERSEY. 105 



Description of male. — Carapace similar to that of female, 

 relatively little shorter and wider, grooving' on dorsal surface 

 indistinct. Eyes invisible in adult. No teeth along carapace 

 margins laterally. Fourth segment plates nearly circular, their 

 combined area well less than carapace, but covering more than 

 half of genital segment plates, and posterior margins thickly set 

 with teeth. They project forward at anterior corners in broad 

 rounded shoulder on either side. Genital segment small, two- 

 thirds size of carapace, orbicular in outline, strongly flattened 

 dorso-ventrally, and dorsal plates fused along mid-line their 

 anterior half, but separated for their posterior half, hind margins 

 thickly set with teeth. Abdomen very small, weak, subquad- 

 rangular, fastened to ventral surface of genital segment so that 

 its hind margin coincides with that of latter. Anal lamina? nar- 

 row, oblong, nearly three times long as wide, each armed with 

 four small setje. Dorsal surface of abdonien and anal lamincC 

 visible through posterior sinus between dorsal plates of genital 

 segment. Appendages as in female, except second antenna? and 

 second maxillipeds larger, and more spines on swimming-legs. 

 Fourth legs fully degenerate as in female, being enlarged into 

 broad laminae with no signs of segmentation. Third leg's like 

 second pair, not enlarged, and each ramus two-jointed, joints 

 about same size, but those of exopod nearly three times size of 

 those of endopod. Terminal joint of endopod in third legs 

 armed with long single spine or claw, curved strongly outward. 

 No plumose setse on swimming-legs. Color as in female, 

 spermatophore receptacles deep purple, and ducts leading to them 

 lighter purple. Length 10 to 15 mm. ( C. B. Wilson.) 



Remarks. — Known fromi New Jersey limits by Leidy's record 

 of four females taken from a large sunfish (Alola mola) cap- 

 tured at Beach Haven in 1890. These, like his examples of 

 Philorthragorisciis scrratus (Kroyer), were found attached to 

 ulcerated surfaces at the root of the caudal fin. 



The following notes are taken from Dr. Wilson's exhaustive 

 account : "It is found almost exclusively on the ocean sunfish 

 {Mola mola), but lives on the outer surfaces of the body, often 

 frequenting the anal fin or its adjacent regions. It occurs often 



