374 CRUSTACEA 



2. Leptochela Dana. Male with large, female with small chelae; 

 5 pairs of pleopods present; uropods biramose; eyes present: 5 American 

 species. 



L. savignyi (Krciyer) (Fig. 592). Chela of male elongated; exopo- 

 dite of uropods composed of 1, endopodite of 6 segments; 

 length 2 mm.; color white: New Jersey to Cape Cod; 

 among seaweed and at the surface; Europe. 



r 



Family 2. ANTHUEIDAE. 



Body cylindrical and elongate, with 7 free thoracic 

 segments; abdomen relatively short, with its anterior 

 somites often fused together; uropods lateral, large, and 

 expanded, the outer branch (exopodite) arching over the 

 telson: about 15 species, 9 American. 



Cyathura Norman and Stebbing. First 5 abdominal 

 segments fused together so as to resemble an eighth 

 thoracic; maxillipeds 3-jointed: 1 American species. 



C. carinata (Kroyer) (Fig. 593). Both pairs of 

 antennae short and thick and with few hairs; length 18 

 mm. ; breadth 2 mm. ; color brownish or yellowish : New 

 Jersey to Greenland; on sand and mud bottoms in shallow 

 water and among seaweed; Europe. 



Family 3. CIROLANIDAE. ^_ 



Body semicylindrical and broad ; abdomen composed Fig. .593 



•^ ■ , ^ ' Cijathura 



of 6 segments; urop'ods lateral, forming with the telson a carinata 



(Harger). 

 caudal swimming fin: 23 American species. 



CiROLANA Leach. First 3 pairs of legs prehensile, last 4 pairs 



ambulatory; first and second pair similar to each other: 



14 American species. 



C. concharum (Stimpson) (Fig. 594). Length 23 mm.; 



breadth 8 mm.; telson triangular; base of uropods is 



extended posteriorly beneath the margin of the telson 



two-thirds of its length: South Carolina to Nova Scotia 



on muddy and sandy bottoms in shallow water, feeding 



on the blue crab and other animals. 



Family 4. ^GIDAE. 



Body broad and more oj* less flattened ; head short and 

 broad, usually with 2 very large eyes on its upper surface; first 3 pairs 

 of legs prehensile; uropods lateral and forming a caudal fin with the 

 telson : parasitic on the skin of fish ; 30 American genera. 



