Laguna Warine Laboratory 95 
last are three stiffly plumose hairs. <A similar hair is placed on each 
side of the eighth joint. Legs rather long but stout, no tibial pro- 
cesses, very few hairs except in double row on tarsus. First coxa 
as long as its own diameter; second twice as long; third coxa one 
and one-half times the length of the first. Femur about as long as the 
combined length of the second and third cox. Second tibial joint 
about the same length as femur; first tibial joint shghtly shorter. 
Tarsus is less than one-half as long as second tibial joint. Tarsus 
has a double row of fine hairs down the ‘‘sole’’ and a few slightly 
longer hairs on the end. Terminal claw is lacking, while the auxiliary 
claws are unusually developed. Color light brown; the food was 
slightly darker making it easy to trace the branches of the stomach 
into the legs as shown in cut. Measurements in mm. Body 1.3; 
proboscis 1.05; abdomen .36; leg 4.2; diameter of leg-bearing pro- 
cesses .214. 
About twenty specimens of this species were found under stones 
at low tide, well down toward low water mark. The males bore on 
their ovigerous legs bunches of dark colored eggs. 
As pointed out to me by Dr. Cole, this species agrees closely with 
A. bi-unguiculata (Dohrn). As he says, ‘‘if we make the proper al- 
lowance for his specimen being an immature one’’ this specimen 
‘‘aorees in detail with Dohrn’s description.’’ But to say that I had 
found in California the mature form of Dohrn’s Naples species (de- 
seribed, as it was from an immature specimen), would be too much 
of a guess without comparing mature forms from both localities. 
This difference of location, the fact of Dohrn’s specimen being im- 
mature, and the desire not to duplicate names, have led me to de- 
seribe mine as a variety of A. bi-unguiculata. 
Ammothella spinosissima n. sp. 
(Figure 51) 
30dy with leg-bearing processes almost circular in outline. These 
processes are grown together for nearly their whole length, and at 
their distal ends are situated large tufts of spines. No interseg- 
mental lines, but on the back, between the second pair of legs, is a 
longitudinal row of three large upright spine-covered, finger-like 
processes. (Bent to the side in the cut as are also the eye tubercle 
and the abdomen). Proboscis shorter than the apparent length of 
the body, but if compared with the length of the body from the 
anterior margin to the base of the abdomen the reverse is true. This 
is owing to the abdomen being inserted between the last pair of leg- 
bearing processes which are the only two that are separated. The 
proboscis is bluntly rounded in front with a notch at the tip; its 
diameter is about half its length. Four eyes, not conspicuously pig- 
