DECAPODS 169 
Carapace subcircular, a little broader than long; dorsally flat, finely 
granulate, the granules larger toward the outer margin; gastric and 
cardiac-intestinal regions bounded by deep grooves. ‘The front is occu- 
pied by two triangular lobes, each tipped with a blunt tooth, and sepa- 
rated from each other by a broad V-shaped sinus, which is prolonged on 
the dorsal surface by a broad, shallow depression continued to the gastric 
region; outer margin of each lobe slightly concave. Outer orbital tooth 
narrow, blunt, well marked. A little in front of the middle of the lateral 
margin is a tooth somewhat larger than the orbital, and directed forward 
and slightly outward. At one third the distance from the orbital to this 
branchial tooth is a much smaller triangular tooth directed outward. 
The antennule are hidden under the carapace. ‘The basal segment of 
the antennz is moderately enlarged. The anterior end of the buccal 
cavern and of the merus of the outer maxillipeds project slightly in front 
of the median sinus of the front. 
Chelipeds equal, rather short, stout, coarsely scabrous-granulate. Merus 
stout, unarmed. Carpus broader than long, having a shallow, plate-like 
blunt tooth along its outer surface, a short blunt tooth at inner angle. 
The palm is about as broad as long, bears a stout blunt spine or tooth 
on the outer side at the articulation of the carpus, and a lower, less 
conspicuous tooth at the articulation of the fingers; two feebly marked 
carine, one connecting the two teeth, the other lower down. The digits 
are longer than the upper margin of the palm, bent down, not gaping, 
the pollex much stouter than the dactylus, edges denticulate; the pollex 
has a superior longitudinal groove; its inner superior margin is subacute 
and continuous with that of the palm. Second pair of feet about twice 
as long as the carapace, dactylus longer than propodus. ‘Third pair 
exceeding the second by half the length of the dactylus. Last two pairs 
of feet missing. 
Color.—Carapace speckled with small black spots, in alcohol. 
Dimensions.— Length of carapace of male, to end of horns, 3.4 mm., 
width 3.7 mm. Length of female 2.8 mm., width 3 mm. 
Type locality.—Southern California, either at Catalina Harbor or 
Monterey (probably the former); W. H. Dall; 14, 19 (Cat. No. 
14,256). 
Additional specimen.—A female corresponding to the above was 
dredged in 1863 at Catalina Island by Dr. J. G. Cooper. With it 1s a 
male (Plate 1x, fig. 5) a little larger and as long as wide (4.3 mm. 
long to end of horns and 4.2 mm. wide), which differs notably in the 
following particulars: The frontal lobes are prolonged in cylindrical 
blunt spines; the upper orbital margin has an inner rectangular sinus, 
