Laguna Barine Laboratory 129 
ible by dissection, composed of three small articles. Maxillipeds 
have a palp of three articles. Palp of mandibles wanting. 
Segments of thorax subequal; post-lateral angles of last three 
very marked and produced. Epimera not distinct. Legs all similar, 
ambulatory, very much spined and increasing in length from first 
to seventh. 
Abdomen abruptly narrower than thorax; first five segments sub- 
equal. Post-lateral angles of third, fourth and fifth produced. Last 
abdominal segment produced medially. Median length about half 
the greatest width. Basal segment of uropod about as wide as long 
and extends beyond last abdominal segment; inner ramus a little 
less than half as long as the outer; both rami are spined. 
Dynamene glabra Richardson 
(Figure 72) 
Locality—F ound on Phyllospadix at Laguna Beach, California: 
Color—Pale orange brown, somewhat mottled, with white spot 
on telson; become dark brown in alcohol. 
Body convex ovate, about twice as long as wide, 3 mm. by t1% 
mm.; surface smooth. 
Head small and rounded anteriorly. Eyes placed in the post- 
lateral angles. First pair of antenna with first article of peduncle 
less than twice as long as wide; second and third articles subequal 
and narrower that first. Flagellum composed of twelve articles. 
Second antenna with first article of peduncle about as long as wide, 
small; second twice as long as first; third about the same length as 
first; fourth similar to second; fifth one and a third times as long as 
fourth. Flagellum composed of sixteen articles. Maxilliped pro- 
vided with a palp of five articles. Mandible with a palp of three 
articles. 
Thorax has first segment longer than those succeeding, which 
are subequal. Post-lateral angles of last three are produced. Legs 
all ambulatory; dactylus bi-zmegulate. 
Abdomen has the penultimate segment composed of several coal- 
esced segments, though the suture lines were not clear in the speci- 
mens at hand at the time of the drawing. Other specimens found 
later showed two short suture lines. Last abdominal seement trian- 
gular with a median fissure at the posterior extremity. Inner ramus 
of uropod about as long as telson and immovable; outer branch half 
as long as inner, and movable. 
Cirolana harfordi var. spongicola n. var. 
(Figure 73) 
Locality—Sponges at low tide mark, Laguna Beach, California. 
Color—White, but marked with fine black dots. 
