258 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



margins rounded and do not extend quite to the extremity of the 

 terminal abdominal segment. 



u x * 



FIG. 266. i^IVONECA PANAMENSIS. a, MAXILLIPED OF FEMALE. X lit. &, SECOND MAXILLA. X 20i. 

 C,, FIRST MAXILLA. X 20i- d, SEVENTH LEG. X 7. 



The legs are all prehensile. Those of the last four pairs have a 

 high carina on the basis, the carina increasing gradually in height from 

 the fourth to the seventh pair. 



FIG. 267. LlVONECA VULGARIS (AFTER SCHICEDTE AND 



MEINERT). a, YOUNG OF THE FIRST STAGE. 6, ADULT 

 MALE, c, LATERAL VIEW OF THORAX OF ADULT FE- 

 MALE, d, ADULT FEMALE, e, LATERAL VIEW OF THO- 

 RAX OF ADULT MALE. (ALL ENLARGED.) 



LlVONECA VULGARIS 

 Stimpson. 



Livoneca vulgaris STIMPSON, 

 Bost. Jour. Nat. Hist., VI, 

 1857, p. 508, pi. xxii, fig. 

 9. SCHKEDTE and MEI- 

 NERT, Naturhistorisk Tids- 

 skrift (3), XIV, 1883-84, 

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

 1-2. RICHARDSON, Proc. 

 U. S. Nat. Mus. , X XI , 1899, 

 p. 830; Ann. Mag. Nat. 

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



Anilocra occidentalism 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 vulgaris 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. 



Localities. Shores of California, near San Francisco, to Santa 

 Margarita Island, Lower California; San Francisco Bay. 



Parasites of the rock cod; of flounder; from Chinese shrimp nets; 

 on Ifyjjerprosopon argenteus; in gills of Steindachneria, Ophiodon 

 elongatus. 



This form is probably the young male of Livoneca vulgaris. 



