ISOPODS OF NORTH AMERICA. 



27 



Fig. 27.— Leptochelia 

 SAViGNYi (After 

 Harger). Female. 

 X 20. 



Harg'er agroos with tlic uuilc of L. si(lu<j)}i/! described as L. edwardsii 

 by Ki'03'er in havitio- the tirst ]mir of anteniue composed of eleven 

 articles. Soino of the specimens have the tirst antenna coini)osed of 

 onl}' ten articles. Kr0yer describes the uropoda as 

 having the inner branch seven-jointed, but the speci- 

 men sent to Professor Harger from Rev. A. M. Nor- 

 man and labeled L. rd/iy/rd.sii agreed with the speci- 

 mens of L. alglcola in having the inner branch of 

 the uropoda six-jointed. Dollfus points out that the 

 two teetii on the propodus of the chelipeds are nearer 

 together in the males of L. alglcola than in the 

 males of L. mvign///, but further states that this 

 character may be du(^. to a diti'erence in the state of 

 development, and not be of real specific value. 



Descrlptiofi of male. — Body narrow, elongated, 2 

 mm. long, \ mm. wide. 



Head a little longer than wide, with the anterior 

 portion nariower than the posterior portion. Eyes 

 large, distinct. Fii'st pair of antenna> greatl}^ elon- 

 gated. The basal article is very long and narrow, 

 and is about equal to the length of the head. The 

 second article is a little more than one-third as long- 

 as the basal article. The third is one-half as long as the second. The 

 flagellum is composed of seven or eight articles. The second pair of 

 antennte are short, and do not reach the extremitv of the basal article 



of the tirst pair of antennte. 



The first segment of the tho- 

 rax is coalesced with the head. 

 The second or tirst free segment 

 is the shortest. The third and 

 fourth or second and third arc 

 subequal and each is a little 

 longer than the first. The fifth 

 and sixth or fourth and fifth 

 free segments are the longest and 

 are subequal; they are nearly 

 twice as long as the first seg- 

 ment. The seventh or sixth 

 free segment is shorter than 

 either of the two preceding seg- 

 ments and about equal in length 

 to the third free segment. 

 The abdomen is composed of six segments, five subequal ones ante- 

 rior to the terminal segment, which posteriorly is triangular, with 

 apex rounded. There are five pairs of well-developed pleopoda. The 



Fig. 28.— Leptochelia SAVIGNYI. Female, o, First 

 LEG. h. First antenna, c, Second antenna. 

 d, Ukopod. X tlh. 



