Two New Isopodsfrom Coast of California. 55 



widest in the middle and cover the ends of the segments with the ex 

 ception of the apex of the posterior angles. The epimera of the fifth, 

 sixth, and seventh segments cover the ends of the segments and are very 

 wide on their posterior margins. 



The epimera of ochotensis are strikingly different. In the second seg 

 ment they occupy the anterior half of the margin, in the third about 

 three-fifths, and in the fourth the anterior three-quarters. The epimera 

 of the fifth segment covers all but the apex of the posterior angle. The 

 margins of the sixth and seventh segments are covered by the epimera. 

 In the last three segments the anterior part of the epimera is narrow 

 where in stenops it is wide. 



The abdomen of stenops is composed of three segments. Another seg 

 ment is indicated by a suture. The basal half of the abdomen is taper 

 ing ; the posterior half has parallel sides ; the posterior angles are rounded 

 and very slightly produced behind. The apex is acute. The surface of 

 the body below the median line is flattened, forming an obtuse ridge 

 from the base of the head to the apex of the abdomen. 



