402 



PROCEEDINGS OF THE ACADEMY OF 



[1897. 



and at Cape Lisburne (No. 13,325, U. S. N. M.) and by Lieutenant 

 Stoney in Norton Sound (No. 13,641, U. S. N. M.), differ from the 

 types in having a stouter abdomen and a much more solid shell; 

 they also lack color, not unlikely because of the greater length 

 of time in alcohol. These specimens come from localities far to the 

 north of the station where the types were obtained. More material 

 in a fresh state may show sound lines of demarcation that are not 

 sufficiently evident in the material at hand. 



Synidotea harfordi, new name. Fig. 13. 

 Idot&a marmoraia Harford, Proc. Cal. Acad. Sci., VII, p. 117, 1877. 



The name given by Mr. Harford was preoccupied by Professor 

 Packard in 1867. (See p. 392). 



The front of the head is nearly 

 straight, the sides are bent abruptly 

 downward and inward ; the eyes are 

 on the angle thus formed, extending 

 the range of vision to objects beneath. 

 The length of the antennae laid off on 

 the median line reaches from the front 

 to the middle of the sixth thoracic seg- 

 ment ; the fifth joint of the peduncle 

 equals in length the third and fourth 

 taken together ; the flagellum has 

 twenty-two segments. 



The body is widest at the second and 

 third segments, tapering forward to 

 the anterolateral angles of the head ; 

 its anterior outline is arcuate ; poste- 

 riorly the body tapers to the end of the 

 narrow abdomen in nearly straight 

 lines. The four anterior segments are the longest. The sur- 

 face of the body is finely punctate under a lens. The median 

 line of the thorax is dark-colored ; on the second, third and fourth 

 segments is a light and slightly impressed V-shaped line, the V 

 opening forward ; on these segments there is also on each side of the 

 V a diagonally-placed light spot shaped like a half-moon : the sur- 

 face is elsewhere spotted and blotched with light and dark. The 

 specimen is labelled ' Magdalena Bay, L. C, "W. J. Fisher.' 



Length 16.5 mm., breadth 5 mm. 



Fig. 13. Synidotea harfordi 

 Benedict, new name, x 3i. 



