1921] Schmitt: The Marine Decapod Crustacea of California 187 
Distribution—The U. 8. National Museum has recently received four other 
specimens, an ovigerous female taken off Point Fermin in 10 fathoms by the 
Venice Marine Biological Station, and two males and an ovigerous female col- 
lected at Laguna Beach by W. A. Hilton. 
Remarks.—Another male (fig. b above) dredged at Santa Catalina Island 
in 1863 by Dr. J. G. Cooper, measuring 4.3 mm. long to end of horns and 4.2 mm. 
wide, differs notably from the more typical forms in the following particulars: 
‘<The frontal lobes are prolonged in cylindrical blunt spines; the upper orbital 
margin has an inner rectangular sinus, while the fissure next the outer tooth is 
larger than in the typical form; the first tooth of the lateral margin is nearer the 
posterior tooth, than it is to the orbital tooth; the surface is more uneven, and 
more coarsely granulate. The legs are absent. I think the differences are not those 
of age, and indicate a distinct species, to which, however, I hesitate to give a name 
on account of the poor condition of the specimen’’ (Rathbun, 1904a, p. 169). 
... these crabs surely receive their full share of attention in the aquarium. 
They persist in carrying about upon their backs pieces of shell, pebbles, sticks, 
fragments of seaweed, or entire shells with their living contents, and seem much 
embarrassed without some such covering. When placed in a glass dish where 
nothing else was available, one seized a snail shell more than twice its own size 
and seemed perfectly content when it had this firmly gripped upon its back. 
They are found in 15-20 fathoms of water on gravel and shell beds. The two 
rear pairs of legs are peculiarly modified into upturned hooks for gripping objects 
carried on their backs. And the dorsal surface of the carapace is reduced to a 
plane (Nininger). 
Family LrucostpAE 
Carapace crab-like; more or less rounded, very hard, afferent (incurrent) open- 
ings to gill chambers lie on either side of mouth at base of third maxillipeds. 
Third maxillipeds completely close the buccal cavern; the three terminal joints 
(constituting palp) wholly concealed by the triangular fourth (merus) joint. 
Antennae small. Legs normal in size and position. Abdomen hidden under the 
thorax. Male and female genital openings sternal. 
Genus Randallia Stimpson 
Carapace strongly convex, subhemispherical, evenly rounded at sides, with 
two lobes or teeth at posterior margin. Front narrow, very short, with a concave 
anterior margin. Merus of third maxillipeds subtriangular, not much shorter than 
the ischium, reaching nearly as far forward as the front. Chelipeds rather long; 
merus subecylindrical; hand narrow; fingers acute and somewhat compressed. 
Ambulatory legs of moderate length; joints not dilated; dactyls styliform. 
Key TO THE CALIFORNIA SPECIES OF RANDALLIA 
I. Carapace of adult nearly smooth, sensibly longer than wide; space between 
posterior median pair of spines or tubercles less than between median and 
lateral. Young «ith unequal, more or less rough tubercles. 
ornata, p. 188. 
II. Carapace covered with large, pearly, beadlike, more or less equal tubercles; 
carapace suborbicular, but slightly longer than wide; space between 
posterior median pair of spines or tubercles greater than between median 
and lateral. (Not known north of San Diego.) 
bulligera, p. 189. 
