~ 
Laguna Warine Laboratory 12 
Head wider than long; anterior margin broadly emarginate and 
slightly narrower than posterior margin. Hyes very small, com- 
pound and placed on the middle of the extreme lateral margin. First 
antenne have four articles; basal article enlarged much broader 
than the other articles. Fourth article clavate and finely haired on 
the superior margin. Second antenne composed of peduncle of five 
articles and a flagellum of twelve. Basal article of peduncle very 
small. Second slightly longer than wide; third somewhat longer 
than second and almost twice as long as wide; fourth and fifth about 
equal in length and longer than the third. The maxilliped has a palp 
of four articles. The mandible is without a palp. 
The first segment of the thorax is only half as long medially as 
laterally. The rest of the segments are more regular in shape and 
sub-equal in length; last two slightly shorter than the others; pos- 
terior margins of all slightly excavate. The epimera of second and 
third segments occupy slightly less than half the lateral margin; 
epimeron of fourth occupies about half and like the other two is very 
narrow; epimeron of fifth segment is broader and occupies about 
two-thirds the lateral margin; epimera of sixth and seventh seg- 
ments occupy the whole length of lateral margin. 
The legs are all similar in structure; propodus di-dactylous and 
slightly haired with short hairs; the three preceding segments pro- 
vided with longer hairs which are more abundant except on the last 
two pairs of legs, where they are very scant. 
Abdomen consists of three distinct and one partially coalesced 
segment. First segments are very short, last is long and produced 
medially to a point. 
Philoscia richardsonae Holmes and Gay. 
(Figure 71) 
Locality—Under old seaweed on the edge of a salt marsh, La- 
guna Beach, California. 
Color—Brown, microscopic examination shows distinct pigment 
markings over the whole surface. 
Body oblong ovate; length slightly over twice the greatest width, 
6 mm. by 2.5 mm. Surface of body thickly covered with fine spines. 
Head twice as wide as long, with arched frontal margin and 
lateral angles subacute. Antenna long; first article of peduncle 
about half as long as second; second and third subequal in length; 
fourth twice as long as third and narrower; fifth somewhat longer 
than fourth; flagellum composed of three articles, of which the see- 
ond is slightly shorter than the first or third; the latter ends in a 
large spine and the whole antenna is provided with numerous short 
spines, especially on the margins. Antennule rudimentary, only vis- 
