258 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



nmri^iu.s rounded and do not extend quite to the extremity of the 

 terminal abdominal segment. 



Fig. 266.— IjIVONECa panamensis. a, Maxilliped of female, x Hi &, Second maxilla, x 20i. 



r. FlEST MAXILLA. X 20^. d, SEVENTH LEG. X 7. 



The leo-s are all prehensile. Those of the last four pairs have a 

 high carina on the basis, the carina increasing gradual!}^ in height from 

 the fourth to the seventh pair. 



LIVONECA VULGARIS 



Stimpson. 



Livoneca vulgaris Stimpson, 

 Bost. Jour. Nat. Hist., VI, 

 1857, p. 508, pi. XXII, fig. 

 9. — ScHicEDTE and Mei- 

 NERT, Naturhistorisli Tids- 

 skrift (3), XIV, 1883-84, 

 pp. 344-349, pi. XIV, figs. 

 1-2. — Richardson, Proc. 

 U.S. Nat. Mus., XXI, 1899, 

 p. 830; Ann. Mag. Nat. 

 Hist. (7),IV, 1899, p. 172. 



Anilocrn occidentalis « Richard- 

 son, Proc. U. S. Nat. Mus., 

 . XXI, 1899, pp. 830-831; 

 Ann. Mag. Nat. Hist. (7), 

 IV, 1899, pp. 172-174; 

 Amer. Nat., XXXIV, 

 1900, p. 220. 



Livoneca vulgarity Richardson, 

 American Naturalist, 

 XXXIV, 1900, p. 221; 

 Harriman Alaska Expedi- 

 tion, Crust., X, 1904, p. 

 214; Proc. U. S. Nat. 

 Museum, XXVII, 1904, 

 p. 659. 



Loca/ if les.— Shoves of California, near San Francisco, to Santa 

 Margarita Island, Lower California; San Francisco Ba3^ 



Parasites of the rock cod; of Hounder; from Cliinese shrimp nets; 

 on //i/jH'rj)rosopon argentem; in gills of ^teindachneria, Ophiodon 

 elongatus. 



Fig. 267.— Livoneca vulgakis (After Schicedte and 

 Meinert). a, Young of the first stage, ft, Adult 

 male, c, Lateral view of thorax of adult fe- 

 male. (/, Adult female, c, Lateral view of tho- 

 rax ok adult male. (All enlarged.) 



a This form is probably the young male of Livoneca vulgaris. 



