JOUKNALi OF ENTOMOLOGY AND ZOOLOGY 59 



along the margin. Second gnathopod (Fig. 18) twice as large as 

 the first and attached far forward on the second segment; first joint 

 as long as the hand; palm broad and slightly convex on both 

 margins, armed with three short, heavy spines on a slight promi- 

 nence at the base and many hairs along the inner margin; finger 

 reaching to the spiny prominence on the palm and uniform in out- 

 line. First peraepod attached at the base of the gill on the third 

 body segment and made up of three small joints. Second peraepod 

 attached at the base of the gill on the fourth segment and composed 

 of but one short segment. Third peraepod (Fig. 14) attached just 

 posterior of the center of the fifth body segment and composed of 

 three segments; the first two of equal length, third very short; total 

 length 1 mm. Fourth and fifth peraepods (Fig. 14) normal, hav- 

 ing proper number of segments and of nearly equal length; palm 

 and claw as long as the other segments of the peraepod combined; 

 palm narrow, armed with a few regularly placed spines; finger but 

 slightly curved. 



Length 3 mm. 



Color light pink to white. 



Several specimens collected from the seaweeds at low tide, La- 

 guna Beach, July, 1914. 



(Contribution from the Zoological Laboratory of Pomona College) 



