374 



CRUSTACEA 



Fig. 592 



Leptochela 



savignyi 



(Harger). 



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

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

 species. 



L. savignyi (Kroyer) (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. 



FAMILY 2. ANTHUBIDAE. 



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 



Cyathura 

 of 6 segments; uropods lateral, forming with the telson a carinata 



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. 



Fig. 594 



Cirolana 



concharum 



(Harger). 



FAMILY 4. ^EGIDAE. 



Body broad and more or 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. 



