1921] Schmitt: The Marine Decapod Crustacea of California 265 
of the preceding species, is about halfway between Angel Island and 
the Southampton Shoal light, where three of the hauls lie in close 
proximity to one another (D 5706, 5718, 5825). At one of these 
(D 5825) as well as at its only upper (D 5715) and lower bay (D 
5723) stations, it was taken in company with P. franciscana and like 
it was found on bottom of the same general character; and it appar- 
ently has the same habits, for at two of the stations numerous worm 
tubes were brought up. The annual mean temperature and salinities, 
which range respectively from 12.7° to 13.3° C, and from 25.3 to 29.6, 
correspond very closely to those given for P. franciscana. 
Pinnixa hiatus Rathbun 
Plate 48, figures 1, 2, 3, and 4 
Pinnixa hiatus Rathbun, Bull. U. 8S. Nat. Mus., 97, 164, text fig. 102, pl. 36, 
figs. 1-4, 1918. 
Original Description of Female.—Carapace very wide, narrowed at sides, 
anterolateral margin arcuate without a definite angle and marked by a raised 
and finely granulate edge up to hepatic region; posterior margin very long and 
straight; front advanced, widely emarginate in dorsal view. Surface smooth, 
sparingly punctate, a groove behind gastric region. Subhepatic region prom- 
inent. Orbits oval, filled by eyes. 
Palm suboblong, upper margin convex, lower margin of palm and thumb 
sinuous, a granulated ridge on distal half just above lower edge. A correspond- 
ing ridge on dactylus. Thumb definitely shorter than dactylus and curving up 
toward it, extremity obliquely notched by means of a tuberculiform tooth. 
Dactylus curved, a tooth just behind middle; a wide gape when fingers are 
closed. 
Merus of first [ambulatory] leg slender, of other legs narrowed at distal 
end; carpus of all legs longer than propodus; propodus tapering distally, but 
wider at end than adjoining end of dactyl; dactyls styliform, more slender in 
first and second pairs; in third pair, the anterior edge of merus and posterior 
edge of propodus. is finely saw-toothed, posterior edge of merus more coarsely 
granulate, anterior edge of dactylus spinulous. Posterior margin of merus of 
second leg finely granulate. Posterior margin of third leg and both margins 
of last leg fringed with hair (Rathbun). 
Dimensions.—Type, female: length of carapace 3.6 mm., width 7.7 mm. 
Type Locality—Off Santa Catalina Island, California; 50 fathoms; known 
only from a single female specimen. 
Pinnixa tubicola Holmes 
Plate 43, figures 5, 6, 7, and 8 
Pinnixa tubicola Holmes, Proc. Calif. Acad. Sci., (2), 4, 569, pl. 20, figs. 
17-18, 1894 (1895); Occas. Papers Calif. Acad. Sci., 7, 91, 1900; Rath- 
bun, H. A. E., 10, 187, 1904; Weymouth, Stanford Univ. Publ., Univ. 
Ser., no. 4, 57, text fig. 4, 1910; Way, Puget Sd. Mar. Sta. Publ., 1, 
361, fig. 13, 1917; Rathbun, Bull. U. S. Nat. Mus., 97, 165, fig. 103, 
pl. 36, figs. 5-8, 1918. 
Characters.—General form subcylindrical. Carapace about two and one-half 
times as wide as long in the female, and twice as broad as long in the male; 
a shallow, transverse depression behind the gastric region which is a convex 
