1Z2 Miss H. Richardson on the Isopods of the 



16. Livoneca californica, SchioJte & Meinert. 



Livoneca californica, Schiodte & Meinert, Naturiiistorisk Tidsskrift, 

 xiv. 1883-84, pp. 372-374, pi. xvi. figs. 1, 2. 



Hah. Shores of California, near San Francisco. 



17. Livoneca vulgaris^ Stimpson. 



Livoneca vulgaris, Stimpson, Journ. Bost. Soc. Nat. Hist. xxii. 1857, 

 p. 68, pi. xxii. fig. 9 J Schiodte & Meinert, Naturhistorisk Tids- 

 skrift, xiv. 1883-84, pp. 344-349, pi. xiv. figs. 1, 2. 



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

 Margarita Island, Lower California. 



18. Livoneca panamensis J Schiodte & Meinert. 



Livoneca panamensis, Schiodte & Meinert, Naturhistorisk Tidsskrift, 

 xiv. 1883-84, pp. 349-353, pi. xiii. figs. 11, 12. 



Hah. Mazatlan ; west shores of Central America; Panama. 



10. Nekocila, Leach. 



19. Nerocila californica^ Schiodte & Meinert. 



Nerocila californica, Schiodte & Meinert, Naturhistorisk Tidsskrift, 

 xiii. 1881-83, pp. 72-76, pi. v. figs. 12, 13, pi. vi. figs. 1, 2. 



Hah. San Diego, California ; Panama Bay. 



11. Anilocra, Leach. 



20. Anilocra occidentalism sp. n. 



Body two and a half times longer than broad. 



Head large, broader than long, one half as broad as the 

 first thoracic segment, produced in front in a short, blunt 

 process, whose anterior edge is roundly truncate. Eyes large, 

 situated at a distance equal to almost half the width of the 

 head apart. The first pair of antennse are composed of eight 

 joints and extend to the middle of the first thoracic segment. 

 The second pair of antennae are composed of nine joints and 

 extend to the posterior angle of the first thoracic segment ; 

 they are more slender than the first pair of antennte. 



The first thoracic segment is trisinuated on its anterior 

 margin, and is one and a half times longer than the second 

 thoracic segment. The other segments are subequal. The 

 sixth and seventh segments are somewhat narrower than the 

 fifth, and the seventh is a little narrower than the sixth. 



