134 Sitst Annual Report 
STUDIES IN LAGUNA AMPHIPODA 
VINNIE R. STOUT 
Orchestia traskiana Stimpson 
(Figures 74 and 75) 
Numerous specimens taken agree very well with the description 
of O. traskiana in Das Vierreich, 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 joimted 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 alge about edges of a brackish 
water slough which is reached by salt water only at times of extreme 
high tides. Laguna 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; antenne about 
tone of green 203; other appendages light and transparent; back, 
sides, legs, and antenne spotted with white; females carrying bright 
orange colored eggs. 
Body robust and smooth. Head very broad and deep. Eyes 
small, subrotund, black. Antenne 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 perwopods one to five shghtly expand- 
ed, joint of pereopod three most strongly so. Propodus of 
pereopods one and two strongly narrowed distally; propodus of 
pereopod four expanded distally, and propodus of pereopod five 
slightly expanded distally. Pleopods one to three thickly clothed 
with long sete; basal joint of rami about one-third as long as pedun- 
