ISOPODS OF NORTH AMERICA, 



679 



lo iiiiii.:28 mm. Uropoda lOj mm. long, a little less than half the 

 length of the body. Body, with uiopoda, H8i mm. 



The head is twice as wide as long. -2^ mm,: 5 mm., with the anterior 



margin widel}' rounded. The eyes are naiTow elongate, ahout twice 



as wide as long, and separated in front b}?^ a distance equal to the 



length of one e3'e, 2 mm. The first pair of antenniv are small and 



inconspicuous. The second pair have the tirst 



4#( 



Fig. 720.— Ligyda baudiniana 

 (After Ives), x 2^. 



VUi. 721.— LlCiYDA liAl'DlNIANA. 



First i.eg of male. ■. lis. 



Fig. 722.— Ligyda bau- 

 diniana (After 

 Dahl). Maxilliped. 

 X 24f . 



two articles short and subequal; the third article is as long as the first 

 two taken together; the fourth is 3 mm. long, or tw4ce as long as the 

 third; the fifth is 4^ mm. long, or one and a half times longer than the 

 fourth. The flagellum is composed of thirty-eight articles, and 

 extends to the posterior margin of the seventh thoracic segment. 

 The maxilliped has a palp of five articles. 



The segments of the thorax are subequal, with lateral margins 

 straight. The epimera are coalesced with the segments, faint depressed 

 lines indicating the place of union. 



All six segments of the abdomen are distinct; the first two are some- 

 what shorter than the three following, and have the lateral parts cov- 

 ered by the seventh thoracic segment. The third, fourth, and fifth 

 segments gradually increase in length, and have the post-lateral angles 

 produced backward in long acute processes. The sixth or terminal 

 segment has the posterior margin triangularly produced in the middle 

 in a very obtuse point, with two small triangular points just within 

 the lateral angles, which are short and not much ])roduced. 



The peduncle of the uropoda is 4 nun. long, the branches Oi nun. 

 long, and of equal length. 



