1921] Schmitt: The Marine Decapod Crustacea of California 261 
Biological Survey of San Francisco Bay.—Pinniza Uttoralis is 
represented in the collection by a single immature female specimen 
taken from a clam dredged at D 5709 (middle bay) in 10 to 121% 
fathoms on ‘‘muddy sand.’’ For this station the annual mean tem- 
perature is 13.05° C with an annual range of 7.8° to 18.0° C; the 
mean salinity 24.39, range 15.2 to 30.1. One specimen of Pinniza 
franciscana was also taken at this station. 
Pinnixa barnharti Rathbun 
Plate 41 
Pinnixa tumida Streets, Bull. U. S. Nat. Mus., 7, 115, 1877; not P. tumida 
Stimpson, 1858. 
Pinnixa faba Rathbun, H. A. E., 10, 188, 1904 (part: specimen from San 
Pedro). 
Pinnixa barnharti Rathbun, Bull. U. 8. Nat. Mus., 97, 149, text fig. 91, 
pl. .32; 1918: 
Original Description of Female.—Carapace hexagonal, very convex in both 
directions, sides truncate, antero-lateral margin a line of very fine granules not 
continued to hepatic region, side walls vertical, subhepatic region prominent, sur- 
face coarsely punctate toward the sides, furrow behind gastric region shallow, 
three deep pits on each side anteriorly, posterior margin very concave. Lobes 
of front prominent and arcuate, viewed from above. Orbits broadly oval, filled 
by the eyes. Antenna as long as width of front and one orbit. 
Chelipeds large; chelae rhomboidal, increasing greatly toward fingers, a sinus 
in lower margin near base of thumb; thumb subhorizontal, a little curved or 
convex beneath, of nearly equal width throughout, tip obliquely truncate, lower 
corner armed with a short, sharp tooth, which is crossed by the sharp tip of the 
dactylus; dactylus oblique, making a large triangular gape with the thumb; a 
strong tooth at middle of dactylus, a fringe of hair above; a patch of long hair 
in the gape. 
Merus of cheliped and [ambulatory] legs hairy above; merus and propodus 
of last two legs hairy below, carpus and propodus of last leg hairy above. 
[Ambulatory] legs thick, first nearly as long as second, but narrower, second 
reaching to dactylus of third, fourth to middle of carpus of third; merus of last 
3 legs convex above, propodus of all tapering, dactylus short, nearly straight, 
broad at base, acuminate. (Rathbun.) 
Dimensions.—Type, female: length of carapace 10.7 mm., width 16.2 mm. 
Color—tThe carapace in alcohol is largely a bluish purple; a few patches of 
same color on chelipeds and first three legs (Rathbun). 
Type Locality.—Venice, California; from cloaca of ‘‘sea cucumber’’ (holo- 
thurian). : 
Distribution—From Venice, California, to Ballenas Bay, Lower California 
(Rathbun). 
Remarks.—‘‘Chela of male very like that of female except palm a little 
shorter; in small but mature female, palm is still shorter....Commensal with 
holothurians, Molpadia’’ (Rathbun). 
