Pomona College, Claremont, California 67 
living in several of the larger shells such as those of Trophon irian- 
gulatus Cpr and T. belcheri Hds. (Figs. 11 and 12). 
Lepidopa myops Stimp. 
We have but one specimen of this sand crab collected by L. Gard- 
ner several years ago. 
BlepliaripDcia occ'uieiitalis Randall 
Numbers of these large sand crabs much like the last in general 
appearance were taken at all times on sandy shores. 
Emeritu aiuilocja Stimp. 
This is the smaller very common sand crab. 
Panitl'trus biterrupttis Randall 
Young of the "lobster" were often found in tide pools. 
Alpheus {Crayon) dentipes Guerin 
These have been taken in sponge masses and in holdfasts. These 
interesting little snapping shrimps were collected a number of times 
especially during the last summer. When placed in aquarium jars 
they snapped the claws in such a manner as to make one believe the 
jars were cracking. The left claw open and closed is shown in Fig. 
19 from Miss Macdonald's drawing. 
Crayon nigromaciilatiis Sm 
Translucent white, with small black dots, a larger dark spot on 
either side near the caudal end of the body. Found commonly in 
sandy tide pools. 
Betieits long'uiactylus Lock., U.S.M. 
This is the most common lobster-like species found in the tide 
pools. It is of a uniform dark red brown. 
B. luirfordi Kingsley, U.S.M. 
Found in kelp holdfasts. Pale olive green, eggs translucent green. 
Stout, Stafford, La P'ollette and others. 
Spironlocaris palpalor Osen 
Antennal scale longer than the telson, maxilliped without exopod. 
Rostrum with superior margin not strongly convex, but nearly 
