134 jfirst annual Report 



STUDIES IN LAGUNA AMPHIPODA 



VINNIE E. STOUT 



Orchestia traskiana Stimpson 

 (Figures 74 and 75) 



Numerous specimens taken agree very well with the description 

 of 0. traskiana iu Das Tierreich, except in having the distance be- 

 tween the eyes varying from considerably less to a little more than 

 one diameter, also in having the flagellum of antenna II with the 

 flagellum somewhat longer than peduncle and 16-18 jointed in male, 

 all the female specimens observed having fourteen joints. Color, 

 dull shades of grayish brown and green, with the appendages bluish. 



Very common under decaying algte about edges of a brackish 

 water slough which is reached by salt water only at times of extreme 

 high tides. Laguua Beach, California. Coll. V. R. Stout. 



Amphithoe corallina n. sp. 

 (Figures 76 and 77) 



The color of the body varying from a fairly bright brownish 

 green 282 (Valette) to dull orange-green 182 and 178; antennas about 

 tone of green 203; other appendages light and transparent; back, 

 sides, legs, and antennae spotted with white ; females carrying bright 

 orange colored eggs. 



Body robust and smooth. Head very broad and deep. Eyes 

 small, subrotund, black. Antennae one and two nearly the same in 

 length, a little more than half as long as the body. First joint of 

 peduncle of antenna one a little longer than the second joint and 

 almost three times as long as the third ; flagellum about twenty-six- 

 jointed and a little longer than the peduncle. Antenna two stouter, 

 peduncle longer than the twenty-four-jointed flagellum ; ultimate 

 joint of peduncle a little shorter than the penultimate. Lower lip 

 similar to that of A. flindersi. Mandibular palp large, third joint 

 longer than second and armed with six long spines. Maxilla two 

 normal with inner plate fringed with compound hairs. Gnathopods 

 one and two about the same length ; gnathopod two broader and more 

 thickly setose. Second joint of perseopods one to five slightly expand- 

 ed, joint of peraeopod three most strongly so. Propodus of 

 perseopods one and two strongly narrowed distally ; propodus of 

 peraeopod four expanded distally, and propodus of peraeopod five 

 slightly expanded distally. Pleopods one to three thickly clothed 

 with long setae; basal joint of raini about one-third as long as peduu- 



