1921] Schmitt: The Marine Decapod Crustacea of California 145 
Description.—Median projection of front narrow, triangular, acute, about 
twice as long as wide at the base and reaching well beyond the middle of the 
narrow, lanceolate eye scales, i.e., to or nearly to their acutely pointed tips; 
lateral projections of front but slightly in advance of the base of the median 
projection, rounded; anterior portion of the carapace about as wide as long, or 
a little less. Eye-stalks compressed, scarcely if at all widening distally; reaching 
about:to the middle of the terminal segment of the antennular peduncle when 
extended, and falling a little short of the antennal peduncle but slightly exceeding 
the antennal scale. Chelipeds not hairy, greater part of upper surface of large 
hand discoidal, widest at level of the bases of the fingers, with raised, finely 
incised, denticulate margins, which posteriorly separate discoidal face from a 
narrow, transversely and longitudinally convex basal (proximal) portion that fills 
in the angle which the upper surface makes with the wrist, or carpus; granules 
on upper face of carpus not confluent, distinct; the fingers are wide and flattened, 
widest distal to articulation of movable finger, outer margins but continuations 
of the denticulate raised outer margins of palm; small hand narrow, rounded, 
palm and fingers subequal, fingers slightly gaping. Dactyls of ambulatory legs 
strongly compressed, spinulous above and below, and terminating in a long, 
corneous claw. 
Dimensions.—Type, male (Cat. No. 53330, U. S. N. M.): length over all 30 mm., 
of carapace and rostrum 7.5 mm., of large hand 7.5 mm., of discoidal upper face 
of hand 6 mm., width of same 5 mm. 
Type Locality—Santa Catalina Island, California; taken by the Venice Marine 
Biological Station near Catalina Harbor (station T 156). 
Distribution—From Santa Catalina Island, and San Pedro to San Diego, 
California, 10 to 30 fathoms. 
Remarks.—This species, though remarkably like P. discoidalis (Milne Ed- 
wards) (see Milne Edwards and Bouvier, Mem. Mus. Comp. Zool., 14, 18, 76, 
pl. vi, figs. 7-14) from the West Indian region, differs sufficiently to be considered 
a distinct species. The rostriform median projection of the carapace of P. dis- 
coidalis is broadly triangular, about as wide at the base as long, the denticulations 
of the raised margins of the upper face of the large hand are less incised, rather 
more crenulate than denticulate; the granules on the carpus of the large cheliped 
are more or less confluent, forming transverse scabrous lines or ridges rather than 
rows of distinct granules. In many of the specimens of P. discoidalis the upper 
face of the hand is as much as one and a-half times as long as wide, with the tip 
of the immovable finger extending slightly beyond that of the movable one. A 
number of specimens have broader, rounder hands, with subequal fingers, as have 
all the specimens of P. holmesi which I have examined. 
Genus Parapagurus Smith 
Abdomen with paired appendages other than the uropods on the first and second 
segments in the male only. External maxillipeds widely separated at base; 
exopodite of first pair of maxillipeds non-flagellate. Chelipeds dissimilar and 
unequal, the right being vastly the larger. Fourth pair of legs subchelate. In 
the female there is only one oviduct, which opens on the coxa of the third left 
thoracic leg. 
